/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/fibonacci.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 11:57:43,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 11:57:43,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 11:57:43,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 11:57:43,849 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 11:57:43,874 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 11:57:43,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 11:57:43,874 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 11:57:43,875 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 11:57:43,876 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 11:57:43,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 11:57:43,876 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 11:57:43,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 11:57:43,876 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 11:57:43,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 11:57:43,892 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 11:57:43,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 11:57:43,893 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 11:57:43,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 11:57:43,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 11:57:43,895 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 11:57:43,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 11:57:43,895 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 11:57:43,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 11:57:43,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 11:57:43,895 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 11:57:43,895 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 11:57:43,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 11:57:43,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 11:57:43,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 11:57:43,896 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 11:57:43,896 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 11:57:43,896 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 11:57:43,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 11:57:43,897 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 11:57:43,897 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 11:57:43,897 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 11:57:44,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 11:57:44,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 11:57:44,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 11:57:44,182 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 11:57:44,183 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 11:57:44,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/fibonacci.wvr.bpl [2021-08-21 11:57:44,185 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/fibonacci.wvr.bpl' [2021-08-21 11:57:44,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 11:57:44,223 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 11:57:44,225 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 11:57:44,225 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 11:57:44,225 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 11:57:44,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:57:44" (1/1) ... [2021-08-21 11:57:44,244 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:57:44" (1/1) ... [2021-08-21 11:57:44,252 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 11:57:44,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 11:57:44,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 11:57:44,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 11:57:44,262 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:57:44" (1/1) ... [2021-08-21 11:57:44,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:57:44" (1/1) ... [2021-08-21 11:57:44,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:57:44" (1/1) ... [2021-08-21 11:57:44,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:57:44" (1/1) ... [2021-08-21 11:57:44,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:57:44" (1/1) ... [2021-08-21 11:57:44,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:57:44" (1/1) ... [2021-08-21 11:57:44,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:57:44" (1/1) ... [2021-08-21 11:57:44,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 11:57:44,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 11:57:44,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 11:57:44,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 11:57:44,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:57:44" (1/1) ... [2021-08-21 11:57:44,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 11:57:44,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:44,351 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 11:57:44,358 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 11:57:44,387 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 11:57:44,388 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 11:57:44,388 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 11:57:44,389 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 11:57:44,389 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 11:57:44,389 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 11:57:44,389 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 11:57:44,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 11:57:44,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 11:57:44,390 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 11:57:44,600 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 11:57:44,600 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-21 11:57:44,602 INFO L202 PluginConnector]: Adding new model fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:57:44 BoogieIcfgContainer [2021-08-21 11:57:44,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 11:57:44,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 11:57:44,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 11:57:44,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 11:57:44,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:57:44" (1/2) ... [2021-08-21 11:57:44,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c65d89 and model type fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:57:44, skipping insertion in model container [2021-08-21 11:57:44,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:57:44" (2/2) ... [2021-08-21 11:57:44,608 INFO L111 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.bpl [2021-08-21 11:57:44,612 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 11:57:44,612 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 11:57:44,612 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 11:57:44,612 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 11:57:44,692 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 11:57:44,727 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 11:57:44,734 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 11:57:44,734 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 11:57:44,742 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2021-08-21 11:57:44,754 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:44,756 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:44,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 11:57:44,762 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:44,762 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:44,763 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:44,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:44,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1080708855, now seen corresponding path program 1 times [2021-08-21 11:57:44,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:44,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437260337] [2021-08-21 11:57:44,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:44,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:45,143 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 11:57:45,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:45,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437260337] [2021-08-21 11:57:45,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437260337] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:57:45,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:57:45,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 11:57:45,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640131747] [2021-08-21 11:57:45,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 11:57:45,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:45,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 11:57:45,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:57:45,166 INFO L87 Difference]: Start difference. First operand has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 11:57:45,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:45,255 INFO L93 Difference]: Finished difference Result 61 states and 108 transitions. [2021-08-21 11:57:45,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 11:57:45,274 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 11:57:45,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:45,288 INFO L225 Difference]: With dead ends: 61 [2021-08-21 11:57:45,288 INFO L226 Difference]: Without dead ends: 54 [2021-08-21 11:57:45,289 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:57:45,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-21 11:57:45,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2021-08-21 11:57:45,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:45,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 79 transitions. [2021-08-21 11:57:45,319 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 79 transitions. Word has length 13 [2021-08-21 11:57:45,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:45,319 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 79 transitions. [2021-08-21 11:57:45,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 11:57:45,320 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 79 transitions. [2021-08-21 11:57:45,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 11:57:45,321 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:45,321 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:45,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 11:57:45,321 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:45,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:45,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1086170513, now seen corresponding path program 2 times [2021-08-21 11:57:45,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:45,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695142753] [2021-08-21 11:57:45,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:45,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:45,459 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 11:57:45,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:45,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695142753] [2021-08-21 11:57:45,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695142753] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:57:45,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:57:45,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 11:57:45,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99693285] [2021-08-21 11:57:45,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 11:57:45,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:45,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 11:57:45,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:57:45,464 INFO L87 Difference]: Start difference. First operand 41 states and 79 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 11:57:45,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:45,531 INFO L93 Difference]: Finished difference Result 52 states and 95 transitions. [2021-08-21 11:57:45,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 11:57:45,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 11:57:45,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:45,533 INFO L225 Difference]: With dead ends: 52 [2021-08-21 11:57:45,533 INFO L226 Difference]: Without dead ends: 45 [2021-08-21 11:57:45,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:57:45,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-21 11:57:45,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-08-21 11:57:45,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:45,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 85 transitions. [2021-08-21 11:57:45,552 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 85 transitions. Word has length 13 [2021-08-21 11:57:45,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:45,553 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 85 transitions. [2021-08-21 11:57:45,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 11:57:45,554 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 85 transitions. [2021-08-21 11:57:45,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 11:57:45,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:45,555 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:45,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 11:57:45,557 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:45,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:45,558 INFO L82 PathProgramCache]: Analyzing trace with hash -831143929, now seen corresponding path program 1 times [2021-08-21 11:57:45,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:45,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914131154] [2021-08-21 11:57:45,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:45,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:45,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:45,629 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 11:57:45,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:45,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914131154] [2021-08-21 11:57:45,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914131154] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:57:45,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:57:45,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 11:57:45,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800661542] [2021-08-21 11:57:45,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 11:57:45,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:45,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 11:57:45,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:57:45,633 INFO L87 Difference]: Start difference. First operand 45 states and 85 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:45,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:45,679 INFO L93 Difference]: Finished difference Result 63 states and 114 transitions. [2021-08-21 11:57:45,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:57:45,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 11:57:45,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:45,693 INFO L225 Difference]: With dead ends: 63 [2021-08-21 11:57:45,693 INFO L226 Difference]: Without dead ends: 55 [2021-08-21 11:57:45,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:57:45,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-21 11:57:45,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2021-08-21 11:57:45,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:45,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2021-08-21 11:57:45,698 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 14 [2021-08-21 11:57:45,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:45,698 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2021-08-21 11:57:45,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:45,699 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2021-08-21 11:57:45,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 11:57:45,700 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:45,700 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:45,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 11:57:45,701 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:45,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:45,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1760303081, now seen corresponding path program 1 times [2021-08-21 11:57:45,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:45,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010161206] [2021-08-21 11:57:45,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:45,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:45,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:45,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:45,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010161206] [2021-08-21 11:57:45,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010161206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:45,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790946709] [2021-08-21 11:57:45,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:45,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:45,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:45,759 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 11:57:45,762 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 11:57:45,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:45,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 11:57:45,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:45,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790946709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:45,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:45,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 11:57:45,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103601053] [2021-08-21 11:57:45,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 11:57:45,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:45,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 11:57:45,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:57:45,967 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) 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 11:57:46,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:46,028 INFO L93 Difference]: Finished difference Result 59 states and 110 transitions. [2021-08-21 11:57:46,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 11:57:46,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) 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 14 [2021-08-21 11:57:46,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:46,032 INFO L225 Difference]: With dead ends: 59 [2021-08-21 11:57:46,033 INFO L226 Difference]: Without dead ends: 59 [2021-08-21 11:57:46,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:57:46,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-21 11:57:46,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2021-08-21 11:57:46,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.95) internal successors, (78), 40 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:46,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 78 transitions. [2021-08-21 11:57:46,046 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 78 transitions. Word has length 14 [2021-08-21 11:57:46,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:46,046 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 78 transitions. [2021-08-21 11:57:46,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) 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 11:57:46,047 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 78 transitions. [2021-08-21 11:57:46,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 11:57:46,047 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:46,047 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:46,075 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 11:57:46,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:46,265 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:46,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:46,266 INFO L82 PathProgramCache]: Analyzing trace with hash -959886517, now seen corresponding path program 2 times [2021-08-21 11:57:46,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:46,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489912157] [2021-08-21 11:57:46,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:46,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:46,302 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 11:57:46,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:46,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489912157] [2021-08-21 11:57:46,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489912157] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:57:46,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:57:46,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 11:57:46,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930874955] [2021-08-21 11:57:46,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 11:57:46,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:46,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 11:57:46,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:57:46,305 INFO L87 Difference]: Start difference. First operand 41 states and 78 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:46,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:46,348 INFO L93 Difference]: Finished difference Result 80 states and 146 transitions. [2021-08-21 11:57:46,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 11:57:46,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 11:57:46,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:46,349 INFO L225 Difference]: With dead ends: 80 [2021-08-21 11:57:46,349 INFO L226 Difference]: Without dead ends: 80 [2021-08-21 11:57:46,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:57:46,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-21 11:57:46,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 43. [2021-08-21 11:57:46,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:46,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 85 transitions. [2021-08-21 11:57:46,354 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 85 transitions. Word has length 14 [2021-08-21 11:57:46,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:46,354 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 85 transitions. [2021-08-21 11:57:46,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:46,354 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 85 transitions. [2021-08-21 11:57:46,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 11:57:46,355 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:46,355 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:46,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 11:57:46,355 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:46,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:46,356 INFO L82 PathProgramCache]: Analyzing trace with hash -388431711, now seen corresponding path program 3 times [2021-08-21 11:57:46,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:46,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977657607] [2021-08-21 11:57:46,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:46,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:46,385 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 11:57:46,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:46,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977657607] [2021-08-21 11:57:46,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977657607] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:57:46,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:57:46,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 11:57:46,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852338739] [2021-08-21 11:57:46,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 11:57:46,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:46,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 11:57:46,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:57:46,388 INFO L87 Difference]: Start difference. First operand 43 states and 85 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:46,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:46,447 INFO L93 Difference]: Finished difference Result 77 states and 137 transitions. [2021-08-21 11:57:46,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:57:46,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 11:57:46,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:46,448 INFO L225 Difference]: With dead ends: 77 [2021-08-21 11:57:46,448 INFO L226 Difference]: Without dead ends: 74 [2021-08-21 11:57:46,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:57:46,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-21 11:57:46,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 42. [2021-08-21 11:57:46,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:46,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2021-08-21 11:57:46,452 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 14 [2021-08-21 11:57:46,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:46,453 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2021-08-21 11:57:46,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:46,453 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2021-08-21 11:57:46,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 11:57:46,454 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:46,454 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:46,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 11:57:46,454 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:46,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:46,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1974964039, now seen corresponding path program 2 times [2021-08-21 11:57:46,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:46,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853105275] [2021-08-21 11:57:46,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:46,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:46,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:46,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853105275] [2021-08-21 11:57:46,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853105275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:46,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111055169] [2021-08-21 11:57:46,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:57:46,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:46,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:46,494 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 11:57:46,495 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 11:57:46,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:57:46,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:46,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 11:57:46,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:46,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111055169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:46,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:46,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 11:57:46,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963144566] [2021-08-21 11:57:46,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:57:46,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:46,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:57:46,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:57:46,661 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:46,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:46,700 INFO L93 Difference]: Finished difference Result 67 states and 123 transitions. [2021-08-21 11:57:46,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 11:57:46,701 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 11:57:46,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:46,701 INFO L225 Difference]: With dead ends: 67 [2021-08-21 11:57:46,702 INFO L226 Difference]: Without dead ends: 67 [2021-08-21 11:57:46,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:57:46,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-21 11:57:46,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2021-08-21 11:57:46,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:46,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 84 transitions. [2021-08-21 11:57:46,705 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 84 transitions. Word has length 14 [2021-08-21 11:57:46,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:46,705 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 84 transitions. [2021-08-21 11:57:46,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:46,705 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 84 transitions. [2021-08-21 11:57:46,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 11:57:46,706 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:46,706 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:46,733 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 11:57:46,930 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,SelfDestructingSolverStorable6 [2021-08-21 11:57:46,930 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:46,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:46,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1510372935, now seen corresponding path program 3 times [2021-08-21 11:57:46,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:46,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002677994] [2021-08-21 11:57:46,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:46,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:46,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:46,957 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 11:57:46,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:46,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002677994] [2021-08-21 11:57:46,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002677994] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:57:46,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:57:46,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 11:57:46,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927953074] [2021-08-21 11:57:46,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 11:57:46,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:46,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 11:57:46,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:57:46,959 INFO L87 Difference]: Start difference. First operand 43 states and 84 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:47,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:47,024 INFO L93 Difference]: Finished difference Result 60 states and 108 transitions. [2021-08-21 11:57:47,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 11:57:47,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 11:57:47,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:47,025 INFO L225 Difference]: With dead ends: 60 [2021-08-21 11:57:47,025 INFO L226 Difference]: Without dead ends: 58 [2021-08-21 11:57:47,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:57:47,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-21 11:57:47,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 43. [2021-08-21 11:57:47,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 83 transitions. [2021-08-21 11:57:47,028 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 83 transitions. Word has length 14 [2021-08-21 11:57:47,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:47,028 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 83 transitions. [2021-08-21 11:57:47,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:47,028 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 83 transitions. [2021-08-21 11:57:47,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 11:57:47,029 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:47,029 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:47,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-21 11:57:47,029 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:47,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:47,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1990959481, now seen corresponding path program 4 times [2021-08-21 11:57:47,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:47,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574725590] [2021-08-21 11:57:47,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:47,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:47,081 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 11:57:47,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:47,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574725590] [2021-08-21 11:57:47,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574725590] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:57:47,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:57:47,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 11:57:47,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049523620] [2021-08-21 11:57:47,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 11:57:47,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:47,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 11:57:47,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:57:47,084 INFO L87 Difference]: Start difference. First operand 43 states and 83 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:47,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:47,116 INFO L93 Difference]: Finished difference Result 63 states and 119 transitions. [2021-08-21 11:57:47,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 11:57:47,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 11:57:47,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:47,117 INFO L225 Difference]: With dead ends: 63 [2021-08-21 11:57:47,117 INFO L226 Difference]: Without dead ends: 63 [2021-08-21 11:57:47,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:57:47,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-21 11:57:47,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2021-08-21 11:57:47,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:47,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 80 transitions. [2021-08-21 11:57:47,120 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 80 transitions. Word has length 14 [2021-08-21 11:57:47,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:47,120 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 80 transitions. [2021-08-21 11:57:47,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:47,120 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 80 transitions. [2021-08-21 11:57:47,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 11:57:47,121 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:47,121 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:47,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-21 11:57:47,121 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:47,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:47,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1228296659, now seen corresponding path program 5 times [2021-08-21 11:57:47,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:47,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208937812] [2021-08-21 11:57:47,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:47,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:47,160 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 11:57:47,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:47,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208937812] [2021-08-21 11:57:47,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208937812] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:57:47,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:57:47,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 11:57:47,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006224128] [2021-08-21 11:57:47,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 11:57:47,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:47,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 11:57:47,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:57:47,162 INFO L87 Difference]: Start difference. First operand 41 states and 80 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:47,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:47,218 INFO L93 Difference]: Finished difference Result 65 states and 121 transitions. [2021-08-21 11:57:47,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 11:57:47,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 11:57:47,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:47,219 INFO L225 Difference]: With dead ends: 65 [2021-08-21 11:57:47,219 INFO L226 Difference]: Without dead ends: 65 [2021-08-21 11:57:47,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:57:47,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-21 11:57:47,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 41. [2021-08-21 11:57:47,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:47,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 80 transitions. [2021-08-21 11:57:47,222 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 80 transitions. Word has length 14 [2021-08-21 11:57:47,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:47,222 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 80 transitions. [2021-08-21 11:57:47,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:47,222 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 80 transitions. [2021-08-21 11:57:47,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 11:57:47,222 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:47,223 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:47,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-21 11:57:47,223 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:47,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:47,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1799751465, now seen corresponding path program 6 times [2021-08-21 11:57:47,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:47,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677354535] [2021-08-21 11:57:47,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:47,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:47,247 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 11:57:47,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:47,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677354535] [2021-08-21 11:57:47,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677354535] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:57:47,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:57:47,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 11:57:47,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964539688] [2021-08-21 11:57:47,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 11:57:47,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:47,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 11:57:47,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:57:47,250 INFO L87 Difference]: Start difference. First operand 41 states and 80 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:47,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:47,287 INFO L93 Difference]: Finished difference Result 58 states and 103 transitions. [2021-08-21 11:57:47,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 11:57:47,287 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 11:57:47,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:47,288 INFO L225 Difference]: With dead ends: 58 [2021-08-21 11:57:47,288 INFO L226 Difference]: Without dead ends: 55 [2021-08-21 11:57:47,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:57:47,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-21 11:57:47,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2021-08-21 11:57:47,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:47,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 73 transitions. [2021-08-21 11:57:47,290 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 73 transitions. Word has length 14 [2021-08-21 11:57:47,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:47,291 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 73 transitions. [2021-08-21 11:57:47,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:47,291 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 73 transitions. [2021-08-21 11:57:47,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 11:57:47,291 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:47,292 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:47,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-21 11:57:47,292 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:47,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:47,292 INFO L82 PathProgramCache]: Analyzing trace with hash -131820081, now seen corresponding path program 4 times [2021-08-21 11:57:47,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:47,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470724312] [2021-08-21 11:57:47,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:47,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:47,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:47,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:47,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470724312] [2021-08-21 11:57:47,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470724312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:47,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276162760] [2021-08-21 11:57:47,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:57:47,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:47,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:47,318 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 11:57:47,320 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 11:57:47,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:57:47,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:47,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 11:57:47,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:47,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:47,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276162760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:47,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:47,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 11:57:47,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456275229] [2021-08-21 11:57:47,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:57:47,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:47,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:57:47,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:57:47,455 INFO L87 Difference]: Start difference. First operand 39 states and 73 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:47,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:47,491 INFO L93 Difference]: Finished difference Result 60 states and 108 transitions. [2021-08-21 11:57:47,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 11:57:47,492 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 11:57:47,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:47,494 INFO L225 Difference]: With dead ends: 60 [2021-08-21 11:57:47,494 INFO L226 Difference]: Without dead ends: 60 [2021-08-21 11:57:47,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:57:47,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-21 11:57:47,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2021-08-21 11:57:47,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:47,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 79 transitions. [2021-08-21 11:57:47,498 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 79 transitions. Word has length 14 [2021-08-21 11:57:47,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:47,498 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 79 transitions. [2021-08-21 11:57:47,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:47,498 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 79 transitions. [2021-08-21 11:57:47,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 11:57:47,499 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:47,499 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:47,518 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 11:57:47,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:47,718 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:47,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:47,718 INFO L82 PathProgramCache]: Analyzing trace with hash -596411185, now seen corresponding path program 5 times [2021-08-21 11:57:47,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:47,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987111324] [2021-08-21 11:57:47,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:47,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:47,744 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 11:57:47,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:47,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987111324] [2021-08-21 11:57:47,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987111324] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:57:47,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:57:47,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 11:57:47,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990598111] [2021-08-21 11:57:47,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 11:57:47,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:47,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 11:57:47,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:57:47,746 INFO L87 Difference]: Start difference. First operand 41 states and 79 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:47,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:47,793 INFO L93 Difference]: Finished difference Result 74 states and 127 transitions. [2021-08-21 11:57:47,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:57:47,794 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 11:57:47,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:47,794 INFO L225 Difference]: With dead ends: 74 [2021-08-21 11:57:47,794 INFO L226 Difference]: Without dead ends: 72 [2021-08-21 11:57:47,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:57:47,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-21 11:57:47,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2021-08-21 11:57:47,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:47,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2021-08-21 11:57:47,797 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 14 [2021-08-21 11:57:47,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:47,797 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2021-08-21 11:57:47,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:47,797 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2021-08-21 11:57:47,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 11:57:47,798 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:47,798 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:47,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-21 11:57:47,798 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:47,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:47,798 INFO L82 PathProgramCache]: Analyzing trace with hash -213690797, now seen corresponding path program 6 times [2021-08-21 11:57:47,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:47,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590866364] [2021-08-21 11:57:47,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:47,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:47,820 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 11:57:47,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:47,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590866364] [2021-08-21 11:57:47,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590866364] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:57:47,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:57:47,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 11:57:47,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391217134] [2021-08-21 11:57:47,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 11:57:47,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:47,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 11:57:47,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:57:47,822 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:47,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:47,856 INFO L93 Difference]: Finished difference Result 44 states and 80 transitions. [2021-08-21 11:57:47,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:57:47,856 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 11:57:47,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:47,857 INFO L225 Difference]: With dead ends: 44 [2021-08-21 11:57:47,857 INFO L226 Difference]: Without dead ends: 40 [2021-08-21 11:57:47,857 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:57:47,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-21 11:57:47,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-08-21 11:57:47,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:47,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2021-08-21 11:57:47,861 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 14 [2021-08-21 11:57:47,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:47,861 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2021-08-21 11:57:47,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:47,861 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2021-08-21 11:57:47,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 11:57:47,862 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:47,862 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:47,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-21 11:57:47,862 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:47,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:47,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1291799271, now seen corresponding path program 1 times [2021-08-21 11:57:47,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:47,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341221252] [2021-08-21 11:57:47,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:47,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:47,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:48,007 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 11:57:48,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:48,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341221252] [2021-08-21 11:57:48,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341221252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:48,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48724890] [2021-08-21 11:57:48,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:48,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:48,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:48,011 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 11:57:48,033 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 11:57:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:48,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:57:48,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:48,357 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 11:57:48,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48724890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:48,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:48,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-21 11:57:48,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377042141] [2021-08-21 11:57:48,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:57:48,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:48,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:57:48,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:57:48,360 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:48,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:48,426 INFO L93 Difference]: Finished difference Result 61 states and 113 transitions. [2021-08-21 11:57:48,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:57:48,427 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 11:57:48,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:48,427 INFO L225 Difference]: With dead ends: 61 [2021-08-21 11:57:48,427 INFO L226 Difference]: Without dead ends: 54 [2021-08-21 11:57:48,429 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:57:48,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-21 11:57:48,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2021-08-21 11:57:48,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.94) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:48,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 97 transitions. [2021-08-21 11:57:48,433 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 97 transitions. Word has length 15 [2021-08-21 11:57:48,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:48,433 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 97 transitions. [2021-08-21 11:57:48,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:48,434 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 97 transitions. [2021-08-21 11:57:48,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 11:57:48,438 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:48,438 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:48,461 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 11:57:48,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 11:57:48,661 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:48,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:48,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1163056683, now seen corresponding path program 2 times [2021-08-21 11:57:48,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:48,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244055299] [2021-08-21 11:57:48,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:48,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:48,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:48,771 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 11:57:48,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:48,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244055299] [2021-08-21 11:57:48,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244055299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:48,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991263526] [2021-08-21 11:57:48,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:57:48,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:48,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:48,772 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 11:57:48,801 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 11:57:48,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:57:48,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:48,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:57:48,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:49,085 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 11:57:49,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991263526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:49,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:49,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 11:57:49,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245762510] [2021-08-21 11:57:49,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:57:49,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:49,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:57:49,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:57:49,087 INFO L87 Difference]: Start difference. First operand 51 states and 97 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 11:57:49,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:49,161 INFO L93 Difference]: Finished difference Result 76 states and 137 transitions. [2021-08-21 11:57:49,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:57:49,161 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 15 [2021-08-21 11:57:49,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:49,162 INFO L225 Difference]: With dead ends: 76 [2021-08-21 11:57:49,162 INFO L226 Difference]: Without dead ends: 69 [2021-08-21 11:57:49,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:57:49,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-21 11:57:49,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2021-08-21 11:57:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:49,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2021-08-21 11:57:49,169 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 15 [2021-08-21 11:57:49,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:49,170 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2021-08-21 11:57:49,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 11:57:49,170 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2021-08-21 11:57:49,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 11:57:49,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:49,170 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:49,195 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 11:57:49,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 11:57:49,387 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:49,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:49,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1517207889, now seen corresponding path program 3 times [2021-08-21 11:57:49,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:49,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169861071] [2021-08-21 11:57:49,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:49,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:49,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:49,475 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 11:57:49,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:49,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169861071] [2021-08-21 11:57:49,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169861071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:49,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393199634] [2021-08-21 11:57:49,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:57:49,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:49,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:49,485 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 11:57:49,486 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 11:57:49,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:57:49,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:49,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:57:49,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:49,759 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 11:57:49,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393199634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:49,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:49,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 11:57:49,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130201579] [2021-08-21 11:57:49,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:57:49,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:49,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:57:49,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:57:49,760 INFO L87 Difference]: Start difference. First operand 52 states and 101 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:49,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:49,825 INFO L93 Difference]: Finished difference Result 64 states and 119 transitions. [2021-08-21 11:57:49,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:57:49,825 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 11:57:49,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:49,826 INFO L225 Difference]: With dead ends: 64 [2021-08-21 11:57:49,826 INFO L226 Difference]: Without dead ends: 57 [2021-08-21 11:57:49,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:57:49,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-21 11:57:49,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2021-08-21 11:57:49,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:49,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2021-08-21 11:57:49,828 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 15 [2021-08-21 11:57:49,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:49,828 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2021-08-21 11:57:49,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:49,828 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2021-08-21 11:57:49,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 11:57:49,829 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:49,829 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:49,855 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 11:57:50,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 11:57:50,049 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:50,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:50,049 INFO L82 PathProgramCache]: Analyzing trace with hash 110977511, now seen corresponding path program 4 times [2021-08-21 11:57:50,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:50,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871501911] [2021-08-21 11:57:50,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:50,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:50,142 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 11:57:50,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:50,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871501911] [2021-08-21 11:57:50,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871501911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:50,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608367471] [2021-08-21 11:57:50,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:57:50,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:50,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:50,149 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 11:57:50,151 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 11:57:50,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:57:50,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:50,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:57:50,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:50,499 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 11:57:50,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608367471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:50,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:50,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 11:57:50,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859634704] [2021-08-21 11:57:50,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:57:50,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:50,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:57:50,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:57:50,501 INFO L87 Difference]: Start difference. First operand 52 states and 101 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 11:57:50,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:50,572 INFO L93 Difference]: Finished difference Result 80 states and 148 transitions. [2021-08-21 11:57:50,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:57:50,572 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 15 [2021-08-21 11:57:50,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:50,574 INFO L225 Difference]: With dead ends: 80 [2021-08-21 11:57:50,574 INFO L226 Difference]: Without dead ends: 73 [2021-08-21 11:57:50,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:57:50,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-21 11:57:50,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 55. [2021-08-21 11:57:50,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:50,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 111 transitions. [2021-08-21 11:57:50,576 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 111 transitions. Word has length 15 [2021-08-21 11:57:50,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:50,577 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 111 transitions. [2021-08-21 11:57:50,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 11:57:50,578 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 111 transitions. [2021-08-21 11:57:50,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 11:57:50,580 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:50,580 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:50,605 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 11:57:50,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:50,800 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:50,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:50,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1725680235, now seen corresponding path program 5 times [2021-08-21 11:57:50,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:50,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051149698] [2021-08-21 11:57:50,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:50,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:50,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:50,885 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 11:57:50,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:50,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051149698] [2021-08-21 11:57:50,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051149698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:50,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145683278] [2021-08-21 11:57:50,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:57:50,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:50,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:50,887 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 11:57:50,888 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 11:57:51,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:57:51,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:51,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:57:51,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:51,234 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 11:57:51,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145683278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:51,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:51,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 11:57:51,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285012877] [2021-08-21 11:57:51,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:57:51,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:51,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:57:51,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:57:51,236 INFO L87 Difference]: Start difference. First operand 55 states and 111 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:51,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:51,309 INFO L93 Difference]: Finished difference Result 82 states and 150 transitions. [2021-08-21 11:57:51,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:57:51,309 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 11:57:51,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:51,310 INFO L225 Difference]: With dead ends: 82 [2021-08-21 11:57:51,310 INFO L226 Difference]: Without dead ends: 75 [2021-08-21 11:57:51,310 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:57:51,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-21 11:57:51,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2021-08-21 11:57:51,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:51,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 107 transitions. [2021-08-21 11:57:51,312 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 107 transitions. Word has length 15 [2021-08-21 11:57:51,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:51,312 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 107 transitions. [2021-08-21 11:57:51,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:51,313 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 107 transitions. [2021-08-21 11:57:51,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 11:57:51,313 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:51,313 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:51,340 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 11:57:51,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:51,541 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:51,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:51,541 INFO L82 PathProgramCache]: Analyzing trace with hash -353613593, now seen corresponding path program 6 times [2021-08-21 11:57:51,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:51,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18472121] [2021-08-21 11:57:51,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:51,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:51,617 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 11:57:51,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:51,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18472121] [2021-08-21 11:57:51,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18472121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:51,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224339170] [2021-08-21 11:57:51,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:57:51,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:51,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:51,618 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 11:57:51,619 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 11:57:51,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 11:57:51,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:51,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:57:51,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:51,939 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 11:57:51,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224339170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:51,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:51,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-21 11:57:51,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505553816] [2021-08-21 11:57:51,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:57:51,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:51,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:57:51,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:57:51,940 INFO L87 Difference]: Start difference. First operand 54 states and 107 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:52,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:52,015 INFO L93 Difference]: Finished difference Result 67 states and 126 transitions. [2021-08-21 11:57:52,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:57:52,015 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 11:57:52,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:52,016 INFO L225 Difference]: With dead ends: 67 [2021-08-21 11:57:52,016 INFO L226 Difference]: Without dead ends: 60 [2021-08-21 11:57:52,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:57:52,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-21 11:57:52,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2021-08-21 11:57:52,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:52,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 113 transitions. [2021-08-21 11:57:52,018 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 113 transitions. Word has length 15 [2021-08-21 11:57:52,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:52,018 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 113 transitions. [2021-08-21 11:57:52,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:52,018 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 113 transitions. [2021-08-21 11:57:52,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:57:52,019 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:52,019 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:52,041 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 11:57:52,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:52,233 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:52,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:52,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1417691671, now seen corresponding path program 7 times [2021-08-21 11:57:52,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:52,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100841163] [2021-08-21 11:57:52,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:52,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:52,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:52,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:52,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100841163] [2021-08-21 11:57:52,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100841163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:52,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151646794] [2021-08-21 11:57:52,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:57:52,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:52,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:52,285 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 11:57:52,287 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 11:57:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:52,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:57:52,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:52,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:52,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151646794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:52,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:52,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 11:57:52,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063571625] [2021-08-21 11:57:52,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:57:52,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:52,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:57:52,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:57:52,502 INFO L87 Difference]: Start difference. First operand 58 states and 113 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:52,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:52,578 INFO L93 Difference]: Finished difference Result 84 states and 155 transitions. [2021-08-21 11:57:52,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:57:52,578 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:57:52,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:52,579 INFO L225 Difference]: With dead ends: 84 [2021-08-21 11:57:52,579 INFO L226 Difference]: Without dead ends: 73 [2021-08-21 11:57:52,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:57:52,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-21 11:57:52,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2021-08-21 11:57:52,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 52 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:52,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 103 transitions. [2021-08-21 11:57:52,581 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 103 transitions. Word has length 16 [2021-08-21 11:57:52,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:52,581 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 103 transitions. [2021-08-21 11:57:52,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:52,581 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 103 transitions. [2021-08-21 11:57:52,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:57:52,582 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:52,582 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:52,607 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 11:57:52,801 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,SelfDestructingSolverStorable20 [2021-08-21 11:57:52,801 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:52,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:52,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1616438265, now seen corresponding path program 8 times [2021-08-21 11:57:52,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:52,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726799048] [2021-08-21 11:57:52,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:52,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:52,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:52,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726799048] [2021-08-21 11:57:52,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726799048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:52,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334863010] [2021-08-21 11:57:52,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:57:52,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:52,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:52,861 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 11:57:52,862 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 11:57:53,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:57:53,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:53,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:57:53,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:53,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334863010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:53,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:53,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 11:57:53,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393840092] [2021-08-21 11:57:53,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:57:53,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:53,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:57:53,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:57:53,079 INFO L87 Difference]: Start difference. First operand 53 states and 103 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:53,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:53,138 INFO L93 Difference]: Finished difference Result 81 states and 154 transitions. [2021-08-21 11:57:53,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:57:53,138 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:57:53,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:53,139 INFO L225 Difference]: With dead ends: 81 [2021-08-21 11:57:53,139 INFO L226 Difference]: Without dead ends: 81 [2021-08-21 11:57:53,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:57:53,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-21 11:57:53,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2021-08-21 11:57:53,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.0) internal successors, (106), 53 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:53,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 106 transitions. [2021-08-21 11:57:53,142 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 106 transitions. Word has length 16 [2021-08-21 11:57:53,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:53,142 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 106 transitions. [2021-08-21 11:57:53,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:53,142 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 106 transitions. [2021-08-21 11:57:53,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:57:53,142 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:53,142 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:53,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-08-21 11:57:53,352 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,SelfDestructingSolverStorable21 [2021-08-21 11:57:53,353 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:53,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:53,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1437143285, now seen corresponding path program 9 times [2021-08-21 11:57:53,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:53,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684541021] [2021-08-21 11:57:53,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:53,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:53,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:53,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684541021] [2021-08-21 11:57:53,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684541021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:53,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164750635] [2021-08-21 11:57:53,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:57:53,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:53,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:53,387 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 11:57:53,419 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 11:57:53,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:57:53,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:53,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:57:53,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:53,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:53,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164750635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:53,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:53,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 11:57:53,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352576972] [2021-08-21 11:57:53,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:57:53,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:53,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:57:53,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:57:53,638 INFO L87 Difference]: Start difference. First operand 54 states and 106 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:53,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:53,778 INFO L93 Difference]: Finished difference Result 154 states and 282 transitions. [2021-08-21 11:57:53,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 11:57:53,779 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:57:53,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:53,779 INFO L225 Difference]: With dead ends: 154 [2021-08-21 11:57:53,780 INFO L226 Difference]: Without dead ends: 154 [2021-08-21 11:57:53,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:57:53,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-21 11:57:53,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 62. [2021-08-21 11:57:53,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1639344262295084) internal successors, (132), 61 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:53,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 132 transitions. [2021-08-21 11:57:53,783 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 132 transitions. Word has length 16 [2021-08-21 11:57:53,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:53,783 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 132 transitions. [2021-08-21 11:57:53,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:53,783 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 132 transitions. [2021-08-21 11:57:53,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:57:53,784 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:53,784 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:53,804 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 11:57:54,003 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,SelfDestructingSolverStorable22 [2021-08-21 11:57:54,003 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:54,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:54,003 INFO L82 PathProgramCache]: Analyzing trace with hash -865688479, now seen corresponding path program 10 times [2021-08-21 11:57:54,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:54,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758151137] [2021-08-21 11:57:54,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:54,003 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:54,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:54,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758151137] [2021-08-21 11:57:54,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758151137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:54,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816440529] [2021-08-21 11:57:54,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:57:54,036 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:54,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:54,061 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 11:57:54,062 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 11:57:54,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:57:54,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:54,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:57:54,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:54,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816440529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:54,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:54,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 11:57:54,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183675484] [2021-08-21 11:57:54,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:57:54,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:54,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:57:54,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:57:54,290 INFO L87 Difference]: Start difference. First operand 62 states and 132 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:54,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:54,455 INFO L93 Difference]: Finished difference Result 157 states and 283 transitions. [2021-08-21 11:57:54,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 11:57:54,455 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:57:54,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:54,456 INFO L225 Difference]: With dead ends: 157 [2021-08-21 11:57:54,456 INFO L226 Difference]: Without dead ends: 154 [2021-08-21 11:57:54,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-08-21 11:57:54,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-21 11:57:54,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 63. [2021-08-21 11:57:54,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:54,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 130 transitions. [2021-08-21 11:57:54,459 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 130 transitions. Word has length 16 [2021-08-21 11:57:54,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:54,459 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 130 transitions. [2021-08-21 11:57:54,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:54,459 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 130 transitions. [2021-08-21 11:57:54,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:57:54,459 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:54,459 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:54,516 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 11:57:54,660 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,SelfDestructingSolverStorable23 [2021-08-21 11:57:54,660 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:54,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:54,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1497707271, now seen corresponding path program 11 times [2021-08-21 11:57:54,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:54,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348914848] [2021-08-21 11:57:54,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:54,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:54,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:54,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348914848] [2021-08-21 11:57:54,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348914848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:54,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662943920] [2021-08-21 11:57:54,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:57:54,700 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:54,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:54,701 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 11:57:54,731 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 11:57:54,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:57:54,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:54,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:57:54,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:54,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662943920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:54,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:54,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 11:57:54,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562160795] [2021-08-21 11:57:54,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:57:54,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:54,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:57:54,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:57:54,979 INFO L87 Difference]: Start difference. First operand 63 states and 130 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:55,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:55,093 INFO L93 Difference]: Finished difference Result 160 states and 307 transitions. [2021-08-21 11:57:55,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 11:57:55,094 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:57:55,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:55,094 INFO L225 Difference]: With dead ends: 160 [2021-08-21 11:57:55,094 INFO L226 Difference]: Without dead ends: 160 [2021-08-21 11:57:55,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:57:55,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-08-21 11:57:55,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 70. [2021-08-21 11:57:55,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.217391304347826) internal successors, (153), 69 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:55,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 153 transitions. [2021-08-21 11:57:55,101 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 153 transitions. Word has length 16 [2021-08-21 11:57:55,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:55,102 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 153 transitions. [2021-08-21 11:57:55,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:55,102 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 153 transitions. [2021-08-21 11:57:55,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:57:55,103 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:55,103 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:55,128 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 11:57:55,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:55,317 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:55,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:55,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1033116167, now seen corresponding path program 12 times [2021-08-21 11:57:55,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:55,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667685437] [2021-08-21 11:57:55,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:55,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:55,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:55,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667685437] [2021-08-21 11:57:55,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667685437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:55,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410900438] [2021-08-21 11:57:55,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:57:55,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:55,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:55,360 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 11:57:55,363 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 11:57:55,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 11:57:55,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:55,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:57:55,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:55,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410900438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:55,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:55,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 11:57:55,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346099177] [2021-08-21 11:57:55,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:57:55,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:55,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:57:55,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:57:55,628 INFO L87 Difference]: Start difference. First operand 70 states and 153 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:55,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:55,779 INFO L93 Difference]: Finished difference Result 114 states and 223 transitions. [2021-08-21 11:57:55,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 11:57:55,780 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:57:55,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:55,781 INFO L225 Difference]: With dead ends: 114 [2021-08-21 11:57:55,781 INFO L226 Difference]: Without dead ends: 110 [2021-08-21 11:57:55,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:57:55,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-08-21 11:57:55,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 72. [2021-08-21 11:57:55,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.183098591549296) internal successors, (155), 71 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:55,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 155 transitions. [2021-08-21 11:57:55,784 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 155 transitions. Word has length 16 [2021-08-21 11:57:55,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:55,784 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 155 transitions. [2021-08-21 11:57:55,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:55,784 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 155 transitions. [2021-08-21 11:57:55,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:57:55,784 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:55,784 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:55,813 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 11:57:55,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 11:57:55,985 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:55,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:55,985 INFO L82 PathProgramCache]: Analyzing trace with hash -330458677, now seen corresponding path program 13 times [2021-08-21 11:57:55,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:55,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910477464] [2021-08-21 11:57:55,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:55,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:56,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:56,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910477464] [2021-08-21 11:57:56,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910477464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:56,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267299718] [2021-08-21 11:57:56,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:57:56,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:56,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:56,021 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 11:57:56,022 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 11:57:56,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:56,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:57:56,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:56,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:56,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267299718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:56,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:56,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 11:57:56,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596073412] [2021-08-21 11:57:56,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:57:56,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:56,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:57:56,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:57:56,287 INFO L87 Difference]: Start difference. First operand 72 states and 155 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:56,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:56,411 INFO L93 Difference]: Finished difference Result 132 states and 247 transitions. [2021-08-21 11:57:56,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 11:57:56,414 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:57:56,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:56,414 INFO L225 Difference]: With dead ends: 132 [2021-08-21 11:57:56,414 INFO L226 Difference]: Without dead ends: 126 [2021-08-21 11:57:56,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:57:56,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-08-21 11:57:56,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2021-08-21 11:57:56,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.1549295774647885) internal successors, (153), 71 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:56,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 153 transitions. [2021-08-21 11:57:56,417 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 153 transitions. Word has length 16 [2021-08-21 11:57:56,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:56,418 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 153 transitions. [2021-08-21 11:57:56,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:56,418 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 153 transitions. [2021-08-21 11:57:56,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:57:56,418 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:56,418 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:56,436 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 11:57:56,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 11:57:56,629 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:56,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:56,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1051975989, now seen corresponding path program 14 times [2021-08-21 11:57:56,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:56,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222659711] [2021-08-21 11:57:56,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:56,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:56,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:56,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222659711] [2021-08-21 11:57:56,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222659711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:56,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557136177] [2021-08-21 11:57:56,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:57:56,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:56,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:56,661 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 11:57:56,674 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 11:57:56,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:57:56,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:56,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:57:56,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:56,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557136177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:56,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:56,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-21 11:57:56,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132581130] [2021-08-21 11:57:56,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:57:56,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:56,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:57:56,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:57:56,964 INFO L87 Difference]: Start difference. First operand 72 states and 153 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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 11:57:57,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:57,069 INFO L93 Difference]: Finished difference Result 186 states and 367 transitions. [2021-08-21 11:57:57,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 11:57:57,070 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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 16 [2021-08-21 11:57:57,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:57,071 INFO L225 Difference]: With dead ends: 186 [2021-08-21 11:57:57,071 INFO L226 Difference]: Without dead ends: 186 [2021-08-21 11:57:57,071 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:57:57,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-08-21 11:57:57,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 84. [2021-08-21 11:57:57,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.3132530120481927) internal successors, (192), 83 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:57,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 192 transitions. [2021-08-21 11:57:57,074 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 192 transitions. Word has length 16 [2021-08-21 11:57:57,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:57,075 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 192 transitions. [2021-08-21 11:57:57,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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 11:57:57,075 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 192 transitions. [2021-08-21 11:57:57,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:57:57,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:57,075 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:57,098 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 11:57:57,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 11:57:57,299 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:57,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:57,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1516567093, now seen corresponding path program 15 times [2021-08-21 11:57:57,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:57,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848112553] [2021-08-21 11:57:57,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:57,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:57,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:57:57,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:57,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848112553] [2021-08-21 11:57:57,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848112553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:57,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019162340] [2021-08-21 11:57:57,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:57:57,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:57,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:57,326 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 11:57:57,327 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 11:57:57,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 11:57:57,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:57,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:57:57,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:57,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019162340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:57,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:57,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-21 11:57:57,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789699574] [2021-08-21 11:57:57,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:57:57,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:57,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:57:57,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:57:57,624 INFO L87 Difference]: Start difference. First operand 84 states and 192 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:57,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:57,794 INFO L93 Difference]: Finished difference Result 157 states and 310 transitions. [2021-08-21 11:57:57,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 11:57:57,794 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:57:57,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:57,795 INFO L225 Difference]: With dead ends: 157 [2021-08-21 11:57:57,795 INFO L226 Difference]: Without dead ends: 155 [2021-08-21 11:57:57,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 136.3ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:57:57,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-08-21 11:57:57,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 84. [2021-08-21 11:57:57,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:57,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 191 transitions. [2021-08-21 11:57:57,799 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 191 transitions. Word has length 16 [2021-08-21 11:57:57,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:57,799 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 191 transitions. [2021-08-21 11:57:57,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:57,799 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 191 transitions. [2021-08-21 11:57:57,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:57:57,799 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:57,799 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:57,817 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 11:57:58,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 11:57:58,009 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:58,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:58,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1550166321, now seen corresponding path program 16 times [2021-08-21 11:57:58,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:58,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059661389] [2021-08-21 11:57:58,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:58,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:58,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:58,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059661389] [2021-08-21 11:57:58,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059661389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:58,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168790467] [2021-08-21 11:57:58,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:57:58,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:58,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:58,053 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 11:57:58,068 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 11:57:58,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:57:58,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:58,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:57:58,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:58,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:58,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168790467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:58,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:58,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 11:57:58,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388554049] [2021-08-21 11:57:58,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 11:57:58,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:58,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 11:57:58,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:57:58,365 INFO L87 Difference]: Start difference. First operand 84 states and 191 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:58,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:58,527 INFO L93 Difference]: Finished difference Result 146 states and 304 transitions. [2021-08-21 11:57:58,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 11:57:58,529 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:57:58,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:58,529 INFO L225 Difference]: With dead ends: 146 [2021-08-21 11:57:58,529 INFO L226 Difference]: Without dead ends: 142 [2021-08-21 11:57:58,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 140.7ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:57:58,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-08-21 11:57:58,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 94. [2021-08-21 11:57:58,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.3655913978494625) internal successors, (220), 93 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:58,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 220 transitions. [2021-08-21 11:57:58,534 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 220 transitions. Word has length 16 [2021-08-21 11:57:58,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:58,534 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 220 transitions. [2021-08-21 11:57:58,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:58,535 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 220 transitions. [2021-08-21 11:57:58,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:57:58,535 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:58,535 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:58,563 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 11:57:58,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:58,759 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:58,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:58,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1574395569, now seen corresponding path program 17 times [2021-08-21 11:57:58,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:58,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116310438] [2021-08-21 11:57:58,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:58,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:58,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:58,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116310438] [2021-08-21 11:57:58,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116310438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:58,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871460325] [2021-08-21 11:57:58,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:57:58,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:58,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:58,790 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 11:57:58,791 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 11:57:58,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 11:57:58,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:58,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:57:58,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:59,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871460325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:59,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:59,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 11:57:59,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210966243] [2021-08-21 11:57:59,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:57:59,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:59,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:57:59,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:57:59,053 INFO L87 Difference]: Start difference. First operand 94 states and 220 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:59,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:59,114 INFO L93 Difference]: Finished difference Result 128 states and 284 transitions. [2021-08-21 11:57:59,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:57:59,115 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:57:59,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:59,116 INFO L225 Difference]: With dead ends: 128 [2021-08-21 11:57:59,116 INFO L226 Difference]: Without dead ends: 128 [2021-08-21 11:57:59,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:57:59,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-21 11:57:59,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2021-08-21 11:57:59,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.391304347826087) internal successors, (220), 92 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:59,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 220 transitions. [2021-08-21 11:57:59,121 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 220 transitions. Word has length 16 [2021-08-21 11:57:59,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:59,121 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 220 transitions. [2021-08-21 11:57:59,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:59,121 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 220 transitions. [2021-08-21 11:57:59,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:57:59,121 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:59,122 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:59,139 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 11:57:59,332 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,SelfDestructingSolverStorable30 [2021-08-21 11:57:59,332 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:59,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:59,333 INFO L82 PathProgramCache]: Analyzing trace with hash -561703037, now seen corresponding path program 18 times [2021-08-21 11:57:59,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:59,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948195955] [2021-08-21 11:57:59,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:59,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:59,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:59,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:59,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948195955] [2021-08-21 11:57:59,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948195955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:59,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032620027] [2021-08-21 11:57:59,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:57:59,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:59,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:59,366 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 11:57:59,368 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 11:57:59,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 11:57:59,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:59,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:57:59,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:59,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032620027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:59,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:59,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 11:57:59,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535203939] [2021-08-21 11:57:59,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:57:59,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:59,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:57:59,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:57:59,655 INFO L87 Difference]: Start difference. First operand 93 states and 220 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:59,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:59,761 INFO L93 Difference]: Finished difference Result 128 states and 288 transitions. [2021-08-21 11:57:59,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:57:59,761 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:57:59,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:59,762 INFO L225 Difference]: With dead ends: 128 [2021-08-21 11:57:59,762 INFO L226 Difference]: Without dead ends: 128 [2021-08-21 11:57:59,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:57:59,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-21 11:57:59,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2021-08-21 11:57:59,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.422680412371134) internal successors, (235), 97 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:59,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 235 transitions. [2021-08-21 11:57:59,765 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 235 transitions. Word has length 16 [2021-08-21 11:57:59,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:59,766 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 235 transitions. [2021-08-21 11:57:59,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:59,766 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 235 transitions. [2021-08-21 11:57:59,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:57:59,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:59,766 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:59,793 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 11:57:59,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:59,985 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:59,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:59,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1584467723, now seen corresponding path program 19 times [2021-08-21 11:57:59,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:59,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068791704] [2021-08-21 11:57:59,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:59,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:00,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:00,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068791704] [2021-08-21 11:58:00,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068791704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:00,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070609419] [2021-08-21 11:58:00,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:58:00,018 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:00,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:00,021 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 11:58:00,047 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 11:58:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:00,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:58:00,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:00,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070609419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:00,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:00,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 11:58:00,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674115382] [2021-08-21 11:58:00,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:58:00,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:00,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:58:00,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:58:00,360 INFO L87 Difference]: Start difference. First operand 98 states and 235 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:00,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:00,511 INFO L93 Difference]: Finished difference Result 175 states and 369 transitions. [2021-08-21 11:58:00,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 11:58:00,513 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:58:00,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:00,514 INFO L225 Difference]: With dead ends: 175 [2021-08-21 11:58:00,514 INFO L226 Difference]: Without dead ends: 175 [2021-08-21 11:58:00,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:58:00,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-08-21 11:58:00,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 101. [2021-08-21 11:58:00,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.46) internal successors, (246), 100 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:00,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 246 transitions. [2021-08-21 11:58:00,519 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 246 transitions. Word has length 16 [2021-08-21 11:58:00,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:00,519 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 246 transitions. [2021-08-21 11:58:00,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:00,519 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 246 transitions. [2021-08-21 11:58:00,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:58:00,520 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:00,520 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:00,542 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 11:58:00,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:00,741 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:00,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:00,741 INFO L82 PathProgramCache]: Analyzing trace with hash -2139044767, now seen corresponding path program 20 times [2021-08-21 11:58:00,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:00,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082508788] [2021-08-21 11:58:00,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:00,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:00,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:00,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082508788] [2021-08-21 11:58:00,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082508788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:00,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064919787] [2021-08-21 11:58:00,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:58:00,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:00,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:00,792 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 11:58:00,793 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 11:58:01,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:58:01,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:01,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:58:01,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:01,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064919787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:01,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:01,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 11:58:01,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907146237] [2021-08-21 11:58:01,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:58:01,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:01,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:58:01,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:58:01,067 INFO L87 Difference]: Start difference. First operand 101 states and 246 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:01,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:01,206 INFO L93 Difference]: Finished difference Result 143 states and 309 transitions. [2021-08-21 11:58:01,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 11:58:01,206 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:58:01,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:01,207 INFO L225 Difference]: With dead ends: 143 [2021-08-21 11:58:01,207 INFO L226 Difference]: Without dead ends: 137 [2021-08-21 11:58:01,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:58:01,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-21 11:58:01,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2021-08-21 11:58:01,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.4329896907216493) internal successors, (236), 97 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:01,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 236 transitions. [2021-08-21 11:58:01,210 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 236 transitions. Word has length 16 [2021-08-21 11:58:01,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:01,210 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 236 transitions. [2021-08-21 11:58:01,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:01,211 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 236 transitions. [2021-08-21 11:58:01,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:58:01,211 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:01,211 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:01,234 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 11:58:01,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:01,434 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:01,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:01,434 INFO L82 PathProgramCache]: Analyzing trace with hash 224350983, now seen corresponding path program 21 times [2021-08-21 11:58:01,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:01,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762345000] [2021-08-21 11:58:01,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:01,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:01,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:01,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762345000] [2021-08-21 11:58:01,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762345000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:01,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723545238] [2021-08-21 11:58:01,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:58:01,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:01,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:01,469 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 11:58:01,495 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 11:58:01,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:58:01,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:01,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:58:01,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:01,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723545238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:01,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:01,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 11:58:01,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091488032] [2021-08-21 11:58:01,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:58:01,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:01,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:58:01,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:58:01,800 INFO L87 Difference]: Start difference. First operand 98 states and 236 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:01,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:01,913 INFO L93 Difference]: Finished difference Result 189 states and 398 transitions. [2021-08-21 11:58:01,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 11:58:01,913 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:58:01,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:01,914 INFO L225 Difference]: With dead ends: 189 [2021-08-21 11:58:01,914 INFO L226 Difference]: Without dead ends: 189 [2021-08-21 11:58:01,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:58:01,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-08-21 11:58:01,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 106. [2021-08-21 11:58:01,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.5047619047619047) internal successors, (263), 105 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:01,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 263 transitions. [2021-08-21 11:58:01,921 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 263 transitions. Word has length 16 [2021-08-21 11:58:01,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:01,921 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 263 transitions. [2021-08-21 11:58:01,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:01,921 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 263 transitions. [2021-08-21 11:58:01,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:58:01,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:01,922 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:01,948 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 11:58:02,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:02,137 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:02,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:02,137 INFO L82 PathProgramCache]: Analyzing trace with hash -240240121, now seen corresponding path program 22 times [2021-08-21 11:58:02,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:02,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874348873] [2021-08-21 11:58:02,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:02,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:02,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:02,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:02,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874348873] [2021-08-21 11:58:02,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874348873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:02,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223617493] [2021-08-21 11:58:02,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:58:02,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:02,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:02,169 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 11:58:02,170 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 11:58:02,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:58:02,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:02,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:58:02,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:02,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223617493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:02,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:02,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 11:58:02,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171684710] [2021-08-21 11:58:02,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:58:02,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:02,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:58:02,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:58:02,485 INFO L87 Difference]: Start difference. First operand 106 states and 263 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:02,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:02,643 INFO L93 Difference]: Finished difference Result 179 states and 382 transitions. [2021-08-21 11:58:02,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 11:58:02,644 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:58:02,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:02,645 INFO L225 Difference]: With dead ends: 179 [2021-08-21 11:58:02,645 INFO L226 Difference]: Without dead ends: 177 [2021-08-21 11:58:02,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-08-21 11:58:02,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-08-21 11:58:02,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 101. [2021-08-21 11:58:02,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.44) internal successors, (244), 100 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:02,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 244 transitions. [2021-08-21 11:58:02,649 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 244 transitions. Word has length 16 [2021-08-21 11:58:02,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:02,649 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 244 transitions. [2021-08-21 11:58:02,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:02,649 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 244 transitions. [2021-08-21 11:58:02,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:58:02,649 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:02,649 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:02,674 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 11:58:02,850 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,SelfDestructingSolverStorable35 [2021-08-21 11:58:02,850 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:02,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:02,850 INFO L82 PathProgramCache]: Analyzing trace with hash -273839349, now seen corresponding path program 23 times [2021-08-21 11:58:02,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:02,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711730941] [2021-08-21 11:58:02,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:02,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:02,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:02,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711730941] [2021-08-21 11:58:02,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711730941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:02,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364134216] [2021-08-21 11:58:02,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:58:02,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:02,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:02,890 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 11:58:02,891 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 11:58:03,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:58:03,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:03,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:58:03,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:03,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364134216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:03,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:03,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 11:58:03,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962760428] [2021-08-21 11:58:03,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:58:03,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:03,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:58:03,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:58:03,186 INFO L87 Difference]: Start difference. First operand 101 states and 244 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:03,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:03,304 INFO L93 Difference]: Finished difference Result 150 states and 322 transitions. [2021-08-21 11:58:03,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 11:58:03,304 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:58:03,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:03,305 INFO L225 Difference]: With dead ends: 150 [2021-08-21 11:58:03,305 INFO L226 Difference]: Without dead ends: 146 [2021-08-21 11:58:03,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:58:03,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-08-21 11:58:03,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 101. [2021-08-21 11:58:03,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.42) internal successors, (242), 100 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 11:58:03,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 242 transitions. [2021-08-21 11:58:03,308 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 242 transitions. Word has length 16 [2021-08-21 11:58:03,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:03,308 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 242 transitions. [2021-08-21 11:58:03,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:03,309 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 242 transitions. [2021-08-21 11:58:03,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:58:03,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:03,309 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:03,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:03,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 11:58:03,532 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:03,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:03,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1294409209, now seen corresponding path program 24 times [2021-08-21 11:58:03,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:03,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024372419] [2021-08-21 11:58:03,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:03,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:03,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:03,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024372419] [2021-08-21 11:58:03,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024372419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:03,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766731837] [2021-08-21 11:58:03,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:58:03,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:03,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:03,564 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 11:58:03,564 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 11:58:03,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 11:58:03,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:03,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:58:03,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:03,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766731837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:03,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:03,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 11:58:03,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207301786] [2021-08-21 11:58:03,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:58:03,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:03,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:58:03,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:58:03,861 INFO L87 Difference]: Start difference. First operand 101 states and 242 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:03,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:03,913 INFO L93 Difference]: Finished difference Result 114 states and 266 transitions. [2021-08-21 11:58:03,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:58:03,914 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:58:03,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:03,914 INFO L225 Difference]: With dead ends: 114 [2021-08-21 11:58:03,914 INFO L226 Difference]: Without dead ends: 108 [2021-08-21 11:58:03,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:58:03,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-21 11:58:03,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2021-08-21 11:58:03,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.41) internal successors, (241), 100 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:03,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 241 transitions. [2021-08-21 11:58:03,917 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 241 transitions. Word has length 16 [2021-08-21 11:58:03,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:03,917 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 241 transitions. [2021-08-21 11:58:03,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:03,917 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 241 transitions. [2021-08-21 11:58:03,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:58:03,918 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:03,918 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:03,939 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 11:58:04,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 11:58:04,137 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:04,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:04,137 INFO L82 PathProgramCache]: Analyzing trace with hash 766994383, now seen corresponding path program 25 times [2021-08-21 11:58:04,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:04,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821303822] [2021-08-21 11:58:04,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:04,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:04,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:04,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821303822] [2021-08-21 11:58:04,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821303822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:04,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271671969] [2021-08-21 11:58:04,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:58:04,180 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:04,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:04,193 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 11:58:04,195 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 11:58:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:04,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:58:04,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:04,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:04,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271671969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:04,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:04,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 11:58:04,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657009042] [2021-08-21 11:58:04,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 11:58:04,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:04,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 11:58:04,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:58:04,518 INFO L87 Difference]: Start difference. First operand 101 states and 241 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 11:58:04,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:04,640 INFO L93 Difference]: Finished difference Result 167 states and 364 transitions. [2021-08-21 11:58:04,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 11:58:04,640 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 16 [2021-08-21 11:58:04,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:04,641 INFO L225 Difference]: With dead ends: 167 [2021-08-21 11:58:04,641 INFO L226 Difference]: Without dead ends: 167 [2021-08-21 11:58:04,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-08-21 11:58:04,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-08-21 11:58:04,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 104. [2021-08-21 11:58:04,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.436893203883495) internal successors, (251), 103 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:04,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 251 transitions. [2021-08-21 11:58:04,645 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 251 transitions. Word has length 16 [2021-08-21 11:58:04,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:04,645 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 251 transitions. [2021-08-21 11:58:04,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 11:58:04,645 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 251 transitions. [2021-08-21 11:58:04,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:58:04,645 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:04,646 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:04,666 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 11:58:04,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 11:58:04,857 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:04,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:04,857 INFO L82 PathProgramCache]: Analyzing trace with hash 724981967, now seen corresponding path program 26 times [2021-08-21 11:58:04,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:04,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520840020] [2021-08-21 11:58:04,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:04,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:04,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:04,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520840020] [2021-08-21 11:58:04,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520840020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:04,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690428364] [2021-08-21 11:58:04,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:58:04,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:04,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:04,884 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 11:58:04,885 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 11:58:05,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:58:05,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:05,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:58:05,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:05,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690428364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:05,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:05,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-21 11:58:05,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589965600] [2021-08-21 11:58:05,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:58:05,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:05,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:58:05,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:58:05,212 INFO L87 Difference]: Start difference. First operand 104 states and 251 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:05,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:05,308 INFO L93 Difference]: Finished difference Result 217 states and 462 transitions. [2021-08-21 11:58:05,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 11:58:05,309 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:58:05,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:05,310 INFO L225 Difference]: With dead ends: 217 [2021-08-21 11:58:05,310 INFO L226 Difference]: Without dead ends: 217 [2021-08-21 11:58:05,310 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:58:05,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-08-21 11:58:05,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 115. [2021-08-21 11:58:05,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.526315789473684) internal successors, (288), 114 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:05,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2021-08-21 11:58:05,314 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 16 [2021-08-21 11:58:05,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:05,315 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2021-08-21 11:58:05,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:05,315 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2021-08-21 11:58:05,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:58:05,315 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:05,315 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:05,347 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 11:58:05,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 11:58:05,529 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:05,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:05,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1296436773, now seen corresponding path program 27 times [2021-08-21 11:58:05,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:05,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950080291] [2021-08-21 11:58:05,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:05,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:05,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:05,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:05,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:05,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950080291] [2021-08-21 11:58:05,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950080291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:05,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776396218] [2021-08-21 11:58:05,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:58:05,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:05,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:05,559 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 11:58:05,565 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 11:58:05,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 11:58:05,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:05,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:58:05,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:05,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776396218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:05,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:05,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-21 11:58:05,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490629150] [2021-08-21 11:58:05,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:58:05,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:05,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:58:05,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:58:05,883 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:06,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:06,008 INFO L93 Difference]: Finished difference Result 201 states and 430 transitions. [2021-08-21 11:58:06,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 11:58:06,009 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:58:06,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:06,009 INFO L225 Difference]: With dead ends: 201 [2021-08-21 11:58:06,010 INFO L226 Difference]: Without dead ends: 198 [2021-08-21 11:58:06,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:58:06,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-08-21 11:58:06,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 109. [2021-08-21 11:58:06,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.4537037037037037) internal successors, (265), 108 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:06,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 265 transitions. [2021-08-21 11:58:06,013 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 265 transitions. Word has length 16 [2021-08-21 11:58:06,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:06,014 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 265 transitions. [2021-08-21 11:58:06,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:06,014 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 265 transitions. [2021-08-21 11:58:06,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:58:06,014 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:06,014 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:06,055 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 11:58:06,237 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,SelfDestructingSolverStorable40 [2021-08-21 11:58:06,237 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:06,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:06,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1831666575, now seen corresponding path program 28 times [2021-08-21 11:58:06,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:06,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943181683] [2021-08-21 11:58:06,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:06,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:06,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:06,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943181683] [2021-08-21 11:58:06,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943181683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:06,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906396225] [2021-08-21 11:58:06,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:58:06,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:06,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:06,273 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 11:58:06,273 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 11:58:06,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:58:06,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:06,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:58:06,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:06,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906396225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:06,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:06,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 11:58:06,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629018547] [2021-08-21 11:58:06,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 11:58:06,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:06,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 11:58:06,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:58:06,603 INFO L87 Difference]: Start difference. First operand 109 states and 265 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 11:58:06,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:06,761 INFO L93 Difference]: Finished difference Result 183 states and 400 transitions. [2021-08-21 11:58:06,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 11:58:06,761 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 16 [2021-08-21 11:58:06,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:06,762 INFO L225 Difference]: With dead ends: 183 [2021-08-21 11:58:06,762 INFO L226 Difference]: Without dead ends: 177 [2021-08-21 11:58:06,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:58:06,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-08-21 11:58:06,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 122. [2021-08-21 11:58:06,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.4958677685950414) internal successors, (302), 121 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:06,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 302 transitions. [2021-08-21 11:58:06,765 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 302 transitions. Word has length 16 [2021-08-21 11:58:06,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:06,765 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 302 transitions. [2021-08-21 11:58:06,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 11:58:06,765 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 302 transitions. [2021-08-21 11:58:06,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 11:58:06,765 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:06,766 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:06,785 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 11:58:06,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:06,981 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:06,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:06,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1456641271, now seen corresponding path program 29 times [2021-08-21 11:58:06,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:06,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321266946] [2021-08-21 11:58:06,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:06,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:07,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:07,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:07,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321266946] [2021-08-21 11:58:07,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321266946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:07,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559340039] [2021-08-21 11:58:07,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:58:07,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:07,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:07,112 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 11:58:07,112 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 11:58:07,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:58:07,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:07,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 11:58:07,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:07,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559340039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:07,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:07,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-21 11:58:07,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080498393] [2021-08-21 11:58:07,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 11:58:07,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:07,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 11:58:07,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:58:07,656 INFO L87 Difference]: Start difference. First operand 122 states and 302 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:07,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:07,826 INFO L93 Difference]: Finished difference Result 223 states and 473 transitions. [2021-08-21 11:58:07,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 11:58:07,827 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 11:58:07,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:07,828 INFO L225 Difference]: With dead ends: 223 [2021-08-21 11:58:07,828 INFO L226 Difference]: Without dead ends: 203 [2021-08-21 11:58:07,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 158.8ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:58:07,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-08-21 11:58:07,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2021-08-21 11:58:07,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.475177304964539) internal successors, (349), 141 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:07,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 349 transitions. [2021-08-21 11:58:07,835 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 349 transitions. Word has length 17 [2021-08-21 11:58:07,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:07,837 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 349 transitions. [2021-08-21 11:58:07,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:07,837 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 349 transitions. [2021-08-21 11:58:07,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 11:58:07,837 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:07,837 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:07,856 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 11:58:08,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:08,049 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:08,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:08,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1398193685, now seen corresponding path program 30 times [2021-08-21 11:58:08,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:08,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024325599] [2021-08-21 11:58:08,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:08,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:08,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:08,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024325599] [2021-08-21 11:58:08,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024325599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:08,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750249996] [2021-08-21 11:58:08,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:58:08,190 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:08,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:08,190 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 11:58:08,191 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 11:58:08,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 11:58:08,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:08,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 11:58:08,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:08,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:08,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750249996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:08,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:08,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 11:58:08,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699004756] [2021-08-21 11:58:08,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 11:58:08,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:08,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 11:58:08,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:58:08,683 INFO L87 Difference]: Start difference. First operand 142 states and 349 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:08,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:08,805 INFO L93 Difference]: Finished difference Result 253 states and 530 transitions. [2021-08-21 11:58:08,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:58:08,805 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 11:58:08,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:08,806 INFO L225 Difference]: With dead ends: 253 [2021-08-21 11:58:08,806 INFO L226 Difference]: Without dead ends: 246 [2021-08-21 11:58:08,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:58:08,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-08-21 11:58:08,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 149. [2021-08-21 11:58:08,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.527027027027027) internal successors, (374), 148 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:08,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 374 transitions. [2021-08-21 11:58:08,811 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 374 transitions. Word has length 17 [2021-08-21 11:58:08,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:08,811 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 374 transitions. [2021-08-21 11:58:08,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:08,811 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 374 transitions. [2021-08-21 11:58:08,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 11:58:08,811 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:08,811 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:08,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-21 11:58:09,034 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,SelfDestructingSolverStorable43 [2021-08-21 11:58:09,034 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:09,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:09,035 INFO L82 PathProgramCache]: Analyzing trace with hash 216509039, now seen corresponding path program 31 times [2021-08-21 11:58:09,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:09,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543033894] [2021-08-21 11:58:09,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:09,035 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:09,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:09,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:09,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543033894] [2021-08-21 11:58:09,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543033894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:09,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761238100] [2021-08-21 11:58:09,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:58:09,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:09,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:09,142 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 11:58:09,143 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 11:58:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:09,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 11:58:09,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:09,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:09,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761238100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:09,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:09,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 11:58:09,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027068389] [2021-08-21 11:58:09,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 11:58:09,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:09,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 11:58:09,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:58:09,641 INFO L87 Difference]: Start difference. First operand 149 states and 374 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:09,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:09,795 INFO L93 Difference]: Finished difference Result 239 states and 510 transitions. [2021-08-21 11:58:09,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:58:09,796 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 11:58:09,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:09,797 INFO L225 Difference]: With dead ends: 239 [2021-08-21 11:58:09,797 INFO L226 Difference]: Without dead ends: 223 [2021-08-21 11:58:09,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 148.0ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:58:09,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-08-21 11:58:09,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 148. [2021-08-21 11:58:09,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.5238095238095237) internal successors, (371), 147 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:09,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 371 transitions. [2021-08-21 11:58:09,801 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 371 transitions. Word has length 17 [2021-08-21 11:58:09,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:09,802 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 371 transitions. [2021-08-21 11:58:09,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:09,802 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 371 transitions. [2021-08-21 11:58:09,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 11:58:09,802 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:09,802 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:09,829 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 11:58:10,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:10,021 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:10,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:10,021 INFO L82 PathProgramCache]: Analyzing trace with hash -826738879, now seen corresponding path program 32 times [2021-08-21 11:58:10,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:10,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741554079] [2021-08-21 11:58:10,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:10,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:10,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:10,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:10,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741554079] [2021-08-21 11:58:10,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741554079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:10,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083800302] [2021-08-21 11:58:10,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:58:10,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:10,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:10,133 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 11:58:10,135 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 11:58:10,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:58:10,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:10,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 11:58:10,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:10,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083800302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:10,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:10,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-21 11:58:10,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30691275] [2021-08-21 11:58:10,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 11:58:10,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:10,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 11:58:10,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:58:10,712 INFO L87 Difference]: Start difference. First operand 148 states and 371 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:10,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:10,856 INFO L93 Difference]: Finished difference Result 224 states and 484 transitions. [2021-08-21 11:58:10,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:58:10,856 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 11:58:10,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:10,857 INFO L225 Difference]: With dead ends: 224 [2021-08-21 11:58:10,857 INFO L226 Difference]: Without dead ends: 217 [2021-08-21 11:58:10,857 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 144.4ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:58:10,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-08-21 11:58:10,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 148. [2021-08-21 11:58:10,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.5238095238095237) internal successors, (371), 147 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:10,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 371 transitions. [2021-08-21 11:58:10,861 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 371 transitions. Word has length 17 [2021-08-21 11:58:10,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:10,861 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 371 transitions. [2021-08-21 11:58:10,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:10,862 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 371 transitions. [2021-08-21 11:58:10,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 11:58:10,862 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:10,862 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:10,891 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 11:58:11,080 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,SelfDestructingSolverStorable45 [2021-08-21 11:58:11,081 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:11,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:11,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1799080409, now seen corresponding path program 33 times [2021-08-21 11:58:11,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:11,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304081640] [2021-08-21 11:58:11,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:11,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:11,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:11,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:11,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304081640] [2021-08-21 11:58:11,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304081640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:11,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464908504] [2021-08-21 11:58:11,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:58:11,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:11,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:11,182 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 11:58:11,183 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 11:58:11,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:58:11,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:11,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 11:58:11,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:11,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:11,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464908504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:11,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:11,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-21 11:58:11,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004369756] [2021-08-21 11:58:11,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 11:58:11,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:11,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 11:58:11,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:58:11,706 INFO L87 Difference]: Start difference. First operand 148 states and 371 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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 11:58:11,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:11,800 INFO L93 Difference]: Finished difference Result 218 states and 492 transitions. [2021-08-21 11:58:11,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:58:11,800 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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 17 [2021-08-21 11:58:11,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:11,801 INFO L225 Difference]: With dead ends: 218 [2021-08-21 11:58:11,801 INFO L226 Difference]: Without dead ends: 211 [2021-08-21 11:58:11,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:58:11,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-08-21 11:58:11,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 157. [2021-08-21 11:58:11,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.551282051282051) internal successors, (398), 156 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:11,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 398 transitions. [2021-08-21 11:58:11,805 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 398 transitions. Word has length 17 [2021-08-21 11:58:11,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:11,806 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 398 transitions. [2021-08-21 11:58:11,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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 11:58:11,806 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 398 transitions. [2021-08-21 11:58:11,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 11:58:11,806 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:11,806 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:11,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:12,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:12,029 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:12,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:12,029 INFO L82 PathProgramCache]: Analyzing trace with hash -184377685, now seen corresponding path program 34 times [2021-08-21 11:58:12,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:12,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097401501] [2021-08-21 11:58:12,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:12,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:12,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:12,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097401501] [2021-08-21 11:58:12,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097401501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:12,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267924909] [2021-08-21 11:58:12,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:58:12,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:12,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:12,138 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 11:58:12,139 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 11:58:12,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:58:12,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:12,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 11:58:12,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:12,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267924909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:12,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:12,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-21 11:58:12,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310161923] [2021-08-21 11:58:12,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 11:58:12,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:12,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 11:58:12,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:58:12,698 INFO L87 Difference]: Start difference. First operand 157 states and 398 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:12,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:12,817 INFO L93 Difference]: Finished difference Result 220 states and 491 transitions. [2021-08-21 11:58:12,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:58:12,818 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 11:58:12,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:12,818 INFO L225 Difference]: With dead ends: 220 [2021-08-21 11:58:12,818 INFO L226 Difference]: Without dead ends: 211 [2021-08-21 11:58:12,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:58:12,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-08-21 11:58:12,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 156. [2021-08-21 11:58:12,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.535483870967742) internal successors, (393), 155 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:12,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 393 transitions. [2021-08-21 11:58:12,822 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 393 transitions. Word has length 17 [2021-08-21 11:58:12,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:12,823 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 393 transitions. [2021-08-21 11:58:12,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:12,823 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 393 transitions. [2021-08-21 11:58:12,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 11:58:12,823 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:12,823 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:12,846 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 11:58:13,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-21 11:58:13,039 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:13,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:13,040 INFO L82 PathProgramCache]: Analyzing trace with hash 2031295783, now seen corresponding path program 35 times [2021-08-21 11:58:13,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:13,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941106440] [2021-08-21 11:58:13,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:13,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:13,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:13,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941106440] [2021-08-21 11:58:13,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941106440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:13,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911719685] [2021-08-21 11:58:13,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:58:13,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:13,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:13,130 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 11:58:13,131 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 11:58:13,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 11:58:13,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:13,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 11:58:13,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:13,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911719685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:13,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:13,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-21 11:58:13,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379326284] [2021-08-21 11:58:13,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 11:58:13,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:13,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 11:58:13,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:58:13,719 INFO L87 Difference]: Start difference. First operand 156 states and 393 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:13,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:13,824 INFO L93 Difference]: Finished difference Result 203 states and 463 transitions. [2021-08-21 11:58:13,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:58:13,825 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 11:58:13,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:13,825 INFO L225 Difference]: With dead ends: 203 [2021-08-21 11:58:13,826 INFO L226 Difference]: Without dead ends: 196 [2021-08-21 11:58:13,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:58:13,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-08-21 11:58:13,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 156. [2021-08-21 11:58:13,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.535483870967742) internal successors, (393), 155 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:13,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 393 transitions. [2021-08-21 11:58:13,829 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 393 transitions. Word has length 17 [2021-08-21 11:58:13,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:13,830 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 393 transitions. [2021-08-21 11:58:13,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:13,830 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 393 transitions. [2021-08-21 11:58:13,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 11:58:13,830 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:13,830 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:13,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-08-21 11:58:14,055 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,SelfDestructingSolverStorable48 [2021-08-21 11:58:14,055 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:14,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:14,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1341666965, now seen corresponding path program 36 times [2021-08-21 11:58:14,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:14,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279097445] [2021-08-21 11:58:14,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:14,055 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:14,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:14,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279097445] [2021-08-21 11:58:14,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279097445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:14,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72255033] [2021-08-21 11:58:14,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:58:14,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:14,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:14,186 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 11:58:14,187 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 11:58:14,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 11:58:14,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:14,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 11:58:14,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:14,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:14,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72255033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:14,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:14,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 11:58:14,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027581751] [2021-08-21 11:58:14,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 11:58:14,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:14,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 11:58:14,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:58:14,786 INFO L87 Difference]: Start difference. First operand 156 states and 393 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:14,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:14,914 INFO L93 Difference]: Finished difference Result 276 states and 609 transitions. [2021-08-21 11:58:14,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:58:14,915 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 11:58:14,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:14,916 INFO L225 Difference]: With dead ends: 276 [2021-08-21 11:58:14,916 INFO L226 Difference]: Without dead ends: 259 [2021-08-21 11:58:14,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:58:14,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-08-21 11:58:14,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 173. [2021-08-21 11:58:14,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.604651162790698) internal successors, (448), 172 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:14,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 448 transitions. [2021-08-21 11:58:14,919 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 448 transitions. Word has length 17 [2021-08-21 11:58:14,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:14,920 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 448 transitions. [2021-08-21 11:58:14,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:14,920 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 448 transitions. [2021-08-21 11:58:14,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 11:58:14,920 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:14,920 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:14,941 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 11:58:15,133 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,SelfDestructingSolverStorable49 [2021-08-21 11:58:15,133 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:15,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:15,133 INFO L82 PathProgramCache]: Analyzing trace with hash 273035759, now seen corresponding path program 37 times [2021-08-21 11:58:15,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:15,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517896813] [2021-08-21 11:58:15,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:15,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:15,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:15,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:15,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517896813] [2021-08-21 11:58:15,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517896813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:15,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466190127] [2021-08-21 11:58:15,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:58:15,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:15,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:15,235 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:58:15,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 11:58:15,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:15,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 11:58:15,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:15,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466190127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:15,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:15,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 11:58:15,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91017667] [2021-08-21 11:58:15,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 11:58:15,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:15,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 11:58:15,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:58:15,829 INFO L87 Difference]: Start difference. First operand 173 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:15,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:15,958 INFO L93 Difference]: Finished difference Result 277 states and 604 transitions. [2021-08-21 11:58:15,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:58:15,959 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 11:58:15,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:15,960 INFO L225 Difference]: With dead ends: 277 [2021-08-21 11:58:15,960 INFO L226 Difference]: Without dead ends: 261 [2021-08-21 11:58:15,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 134.7ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:58:15,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-08-21 11:58:15,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 170. [2021-08-21 11:58:15,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.57396449704142) internal successors, (435), 169 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:15,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 435 transitions. [2021-08-21 11:58:15,967 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 435 transitions. Word has length 17 [2021-08-21 11:58:15,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:15,967 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 435 transitions. [2021-08-21 11:58:15,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:15,968 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 435 transitions. [2021-08-21 11:58:15,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 11:58:15,973 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:15,973 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:15,993 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 11:58:16,177 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,SelfDestructingSolverStorable50 [2021-08-21 11:58:16,177 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:16,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:16,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1806258069, now seen corresponding path program 38 times [2021-08-21 11:58:16,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:16,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502153517] [2021-08-21 11:58:16,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:16,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:16,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:16,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502153517] [2021-08-21 11:58:16,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502153517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:16,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128882231] [2021-08-21 11:58:16,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:58:16,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:16,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:16,271 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 11:58:16,273 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 11:58:16,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:58:16,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:16,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 11:58:16,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:16,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:16,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128882231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:16,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:16,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-21 11:58:16,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175025692] [2021-08-21 11:58:16,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 11:58:16,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:16,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 11:58:16,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:58:16,907 INFO L87 Difference]: Start difference. First operand 170 states and 435 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 11:58:17,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:17,057 INFO L93 Difference]: Finished difference Result 262 states and 576 transitions. [2021-08-21 11:58:17,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 11:58:17,058 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 17 [2021-08-21 11:58:17,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:17,059 INFO L225 Difference]: With dead ends: 262 [2021-08-21 11:58:17,059 INFO L226 Difference]: Without dead ends: 244 [2021-08-21 11:58:17,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:58:17,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-08-21 11:58:17,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 169. [2021-08-21 11:58:17,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.5773809523809526) internal successors, (433), 168 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:17,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 433 transitions. [2021-08-21 11:58:17,063 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 433 transitions. Word has length 17 [2021-08-21 11:58:17,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:17,063 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 433 transitions. [2021-08-21 11:58:17,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 11:58:17,063 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 433 transitions. [2021-08-21 11:58:17,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 11:58:17,064 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:17,064 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:17,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-21 11:58:17,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:17,273 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:17,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:17,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1839857297, now seen corresponding path program 39 times [2021-08-21 11:58:17,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:17,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603014495] [2021-08-21 11:58:17,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:17,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:17,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:17,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:17,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603014495] [2021-08-21 11:58:17,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603014495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:17,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795992763] [2021-08-21 11:58:17,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:58:17,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:17,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:17,381 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 11:58:17,382 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 11:58:17,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 11:58:17,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:17,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 11:58:17,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:18,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795992763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:18,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:18,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-21 11:58:18,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112931654] [2021-08-21 11:58:18,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 11:58:18,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:18,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 11:58:18,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:58:18,113 INFO L87 Difference]: Start difference. First operand 169 states and 433 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 11:58:18,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:18,255 INFO L93 Difference]: Finished difference Result 233 states and 528 transitions. [2021-08-21 11:58:18,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:58:18,255 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 17 [2021-08-21 11:58:18,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:18,256 INFO L225 Difference]: With dead ends: 233 [2021-08-21 11:58:18,256 INFO L226 Difference]: Without dead ends: 226 [2021-08-21 11:58:18,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:58:18,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-08-21 11:58:18,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 175. [2021-08-21 11:58:18,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.5402298850574714) internal successors, (442), 174 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:18,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 442 transitions. [2021-08-21 11:58:18,260 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 442 transitions. Word has length 17 [2021-08-21 11:58:18,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:18,260 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 442 transitions. [2021-08-21 11:58:18,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 11:58:18,260 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 442 transitions. [2021-08-21 11:58:18,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 11:58:18,261 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:18,261 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:18,278 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 11:58:18,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:18,465 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:18,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:18,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1383679381, now seen corresponding path program 40 times [2021-08-21 11:58:18,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:18,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23430411] [2021-08-21 11:58:18,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:18,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:18,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:18,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:18,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23430411] [2021-08-21 11:58:18,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23430411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:18,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064707311] [2021-08-21 11:58:18,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:58:18,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:18,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:18,590 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 11:58:18,616 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 11:58:19,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:58:19,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:19,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 11:58:19,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:19,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064707311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:19,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:19,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-21 11:58:19,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044808387] [2021-08-21 11:58:19,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 11:58:19,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:19,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 11:58:19,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:58:19,272 INFO L87 Difference]: Start difference. First operand 175 states and 442 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:19,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:19,407 INFO L93 Difference]: Finished difference Result 259 states and 585 transitions. [2021-08-21 11:58:19,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:58:19,408 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 11:58:19,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:19,409 INFO L225 Difference]: With dead ends: 259 [2021-08-21 11:58:19,409 INFO L226 Difference]: Without dead ends: 249 [2021-08-21 11:58:19,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 138.7ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:58:19,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-08-21 11:58:19,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 182. [2021-08-21 11:58:19,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.569060773480663) internal successors, (465), 181 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:19,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 465 transitions. [2021-08-21 11:58:19,412 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 465 transitions. Word has length 17 [2021-08-21 11:58:19,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:19,412 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 465 transitions. [2021-08-21 11:58:19,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:19,412 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 465 transitions. [2021-08-21 11:58:19,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 11:58:19,413 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:19,413 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:19,432 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 11:58:19,622 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,SelfDestructingSolverStorable53 [2021-08-21 11:58:19,622 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:19,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:19,623 INFO L82 PathProgramCache]: Analyzing trace with hash 231023343, now seen corresponding path program 41 times [2021-08-21 11:58:19,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:19,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431116723] [2021-08-21 11:58:19,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:19,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:19,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:19,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:19,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:19,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431116723] [2021-08-21 11:58:19,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431116723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:19,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81333196] [2021-08-21 11:58:19,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:58:19,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:19,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:19,728 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 11:58:19,730 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 11:58:20,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 11:58:20,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:20,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 11:58:20,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:20,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81333196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:20,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:20,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-21 11:58:20,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136311668] [2021-08-21 11:58:20,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 11:58:20,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:20,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 11:58:20,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:58:20,433 INFO L87 Difference]: Start difference. First operand 182 states and 465 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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 11:58:20,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:20,514 INFO L93 Difference]: Finished difference Result 247 states and 565 transitions. [2021-08-21 11:58:20,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:58:20,514 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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 17 [2021-08-21 11:58:20,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:20,515 INFO L225 Difference]: With dead ends: 247 [2021-08-21 11:58:20,515 INFO L226 Difference]: Without dead ends: 240 [2021-08-21 11:58:20,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:58:20,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-08-21 11:58:20,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 183. [2021-08-21 11:58:20,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5494505494505493) internal successors, (464), 182 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:20,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 464 transitions. [2021-08-21 11:58:20,519 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 464 transitions. Word has length 17 [2021-08-21 11:58:20,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:20,519 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 464 transitions. [2021-08-21 11:58:20,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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 11:58:20,519 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 464 transitions. [2021-08-21 11:58:20,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 11:58:20,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:20,520 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:20,537 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 11:58:20,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:20,720 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:20,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:20,721 INFO L82 PathProgramCache]: Analyzing trace with hash -812224575, now seen corresponding path program 42 times [2021-08-21 11:58:20,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:20,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974577317] [2021-08-21 11:58:20,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:20,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:20,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:20,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:20,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974577317] [2021-08-21 11:58:20,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974577317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:20,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503005210] [2021-08-21 11:58:20,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:58:20,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:20,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:20,804 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 11:58:20,804 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 11:58:21,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 11:58:21,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:21,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 11:58:21,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:21,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:21,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503005210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:21,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:21,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-21 11:58:21,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066941276] [2021-08-21 11:58:21,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 11:58:21,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:21,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 11:58:21,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:58:21,498 INFO L87 Difference]: Start difference. First operand 183 states and 464 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 11:58:21,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:21,594 INFO L93 Difference]: Finished difference Result 231 states and 537 transitions. [2021-08-21 11:58:21,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:58:21,595 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 17 [2021-08-21 11:58:21,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:21,596 INFO L225 Difference]: With dead ends: 231 [2021-08-21 11:58:21,596 INFO L226 Difference]: Without dead ends: 224 [2021-08-21 11:58:21,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:58:21,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-08-21 11:58:21,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 182. [2021-08-21 11:58:21,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.546961325966851) internal successors, (461), 181 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:21,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 461 transitions. [2021-08-21 11:58:21,599 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 461 transitions. Word has length 17 [2021-08-21 11:58:21,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:21,599 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 461 transitions. [2021-08-21 11:58:21,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 11:58:21,599 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 461 transitions. [2021-08-21 11:58:21,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:21,600 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:21,600 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:21,624 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 11:58:21,823 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,SelfDestructingSolverStorable55 [2021-08-21 11:58:21,823 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:21,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:21,824 INFO L82 PathProgramCache]: Analyzing trace with hash -2062140921, now seen corresponding path program 43 times [2021-08-21 11:58:21,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:21,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442238450] [2021-08-21 11:58:21,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:21,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:21,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:21,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442238450] [2021-08-21 11:58:21,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442238450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:21,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111584080] [2021-08-21 11:58:21,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:58:21,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:21,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:21,878 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 11:58:21,879 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 11:58:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:22,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:22,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:22,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111584080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:22,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:22,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-21 11:58:22,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042676608] [2021-08-21 11:58:22,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 11:58:22,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:22,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 11:58:22,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:58:22,470 INFO L87 Difference]: Start difference. First operand 182 states and 461 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:22,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:22,546 INFO L93 Difference]: Finished difference Result 295 states and 722 transitions. [2021-08-21 11:58:22,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 11:58:22,546 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:58:22,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:22,548 INFO L225 Difference]: With dead ends: 295 [2021-08-21 11:58:22,548 INFO L226 Difference]: Without dead ends: 281 [2021-08-21 11:58:22,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-08-21 11:58:22,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-08-21 11:58:22,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 177. [2021-08-21 11:58:22,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.5625) internal successors, (451), 176 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:22,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 451 transitions. [2021-08-21 11:58:22,552 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 451 transitions. Word has length 18 [2021-08-21 11:58:22,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:22,553 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 451 transitions. [2021-08-21 11:58:22,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:22,553 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 451 transitions. [2021-08-21 11:58:22,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:22,553 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:22,553 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:22,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-21 11:58:22,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:22,769 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:22,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:22,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1630888425, now seen corresponding path program 44 times [2021-08-21 11:58:22,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:22,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444977624] [2021-08-21 11:58:22,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:22,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:22,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:22,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:22,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444977624] [2021-08-21 11:58:22,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444977624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:22,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814353785] [2021-08-21 11:58:22,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:58:22,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:22,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:22,816 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 11:58:22,817 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 11:58:23,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:58:23,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:23,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:23,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:23,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814353785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:23,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:23,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-21 11:58:23,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845567351] [2021-08-21 11:58:23,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 11:58:23,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:23,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 11:58:23,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:58:23,521 INFO L87 Difference]: Start difference. First operand 177 states and 451 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:23,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:23,583 INFO L93 Difference]: Finished difference Result 302 states and 747 transitions. [2021-08-21 11:58:23,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:58:23,584 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:58:23,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:23,585 INFO L225 Difference]: With dead ends: 302 [2021-08-21 11:58:23,585 INFO L226 Difference]: Without dead ends: 302 [2021-08-21 11:58:23,585 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:58:23,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-08-21 11:58:23,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 183. [2021-08-21 11:58:23,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.576923076923077) internal successors, (469), 182 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:23,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 469 transitions. [2021-08-21 11:58:23,591 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 469 transitions. Word has length 18 [2021-08-21 11:58:23,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:23,591 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 469 transitions. [2021-08-21 11:58:23,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:23,591 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 469 transitions. [2021-08-21 11:58:23,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:23,592 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:23,592 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:23,614 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 11:58:23,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:23,814 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:23,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:23,815 INFO L82 PathProgramCache]: Analyzing trace with hash 768473931, now seen corresponding path program 45 times [2021-08-21 11:58:23,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:23,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522768026] [2021-08-21 11:58:23,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:23,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:23,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:23,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:23,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522768026] [2021-08-21 11:58:23,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522768026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:23,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255417456] [2021-08-21 11:58:23,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:58:23,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:23,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:23,861 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 11:58:23,862 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 11:58:24,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:58:24,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:24,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:24,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:24,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255417456] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:24,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:24,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 11:58:24,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844420171] [2021-08-21 11:58:24,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:58:24,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:24,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:58:24,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:24,464 INFO L87 Difference]: Start difference. First operand 183 states and 469 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:24,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:24,666 INFO L93 Difference]: Finished difference Result 476 states and 1093 transitions. [2021-08-21 11:58:24,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 11:58:24,667 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:58:24,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:24,669 INFO L225 Difference]: With dead ends: 476 [2021-08-21 11:58:24,669 INFO L226 Difference]: Without dead ends: 474 [2021-08-21 11:58:24,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 170.5ms TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2021-08-21 11:58:24,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-08-21 11:58:24,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 222. [2021-08-21 11:58:24,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.746606334841629) internal successors, (607), 221 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:24,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 607 transitions. [2021-08-21 11:58:24,675 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 607 transitions. Word has length 18 [2021-08-21 11:58:24,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:24,675 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 607 transitions. [2021-08-21 11:58:24,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:24,675 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 607 transitions. [2021-08-21 11:58:24,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:24,676 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:24,676 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:24,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-21 11:58:24,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-21 11:58:24,900 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:24,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:24,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1339928737, now seen corresponding path program 46 times [2021-08-21 11:58:24,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:24,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147434269] [2021-08-21 11:58:24,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:24,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:24,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:24,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:24,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147434269] [2021-08-21 11:58:24,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147434269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:24,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833665868] [2021-08-21 11:58:24,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:58:24,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:24,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:24,949 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 11:58:24,956 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 11:58:25,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:58:25,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:25,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:25,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:25,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833665868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:25,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:25,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 11:58:25,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461467884] [2021-08-21 11:58:25,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:58:25,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:25,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:58:25,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:25,561 INFO L87 Difference]: Start difference. First operand 222 states and 607 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:25,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:25,799 INFO L93 Difference]: Finished difference Result 476 states and 1089 transitions. [2021-08-21 11:58:25,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 11:58:25,800 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:58:25,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:25,801 INFO L225 Difference]: With dead ends: 476 [2021-08-21 11:58:25,801 INFO L226 Difference]: Without dead ends: 470 [2021-08-21 11:58:25,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 192.7ms TimeCoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2021-08-21 11:58:25,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-08-21 11:58:25,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 205. [2021-08-21 11:58:25,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.661764705882353) internal successors, (543), 204 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:25,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 543 transitions. [2021-08-21 11:58:25,807 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 543 transitions. Word has length 18 [2021-08-21 11:58:25,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:25,807 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 543 transitions. [2021-08-21 11:58:25,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:25,807 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 543 transitions. [2021-08-21 11:58:25,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:25,808 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:25,808 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:25,827 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 11:58:26,016 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,SelfDestructingSolverStorable59 [2021-08-21 11:58:26,017 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:26,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:26,017 INFO L82 PathProgramCache]: Analyzing trace with hash -591642809, now seen corresponding path program 47 times [2021-08-21 11:58:26,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:26,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070594139] [2021-08-21 11:58:26,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:26,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:26,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:26,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:26,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070594139] [2021-08-21 11:58:26,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070594139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:26,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342623971] [2021-08-21 11:58:26,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:58:26,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:26,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:26,065 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 11:58:26,066 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 11:58:26,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:58:26,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:26,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:26,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:26,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342623971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:26,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:26,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 11:58:26,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227670240] [2021-08-21 11:58:26,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:58:26,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:26,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:58:26,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:26,691 INFO L87 Difference]: Start difference. First operand 205 states and 543 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:26,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:26,904 INFO L93 Difference]: Finished difference Result 423 states and 962 transitions. [2021-08-21 11:58:26,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 11:58:26,905 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:58:26,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:26,906 INFO L225 Difference]: With dead ends: 423 [2021-08-21 11:58:26,906 INFO L226 Difference]: Without dead ends: 423 [2021-08-21 11:58:26,906 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 162.3ms TimeCoverageRelationStatistics Valid=259, Invalid=443, Unknown=0, NotChecked=0, Total=702 [2021-08-21 11:58:26,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-08-21 11:58:26,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 211. [2021-08-21 11:58:26,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.6904761904761907) internal successors, (565), 210 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:26,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 565 transitions. [2021-08-21 11:58:26,911 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 565 transitions. Word has length 18 [2021-08-21 11:58:26,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:26,911 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 565 transitions. [2021-08-21 11:58:26,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:26,912 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 565 transitions. [2021-08-21 11:58:26,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:26,912 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:26,912 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:26,936 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 11:58:27,128 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,SelfDestructingSolverStorable60 [2021-08-21 11:58:27,129 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:27,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:27,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1056233913, now seen corresponding path program 48 times [2021-08-21 11:58:27,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:27,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228354315] [2021-08-21 11:58:27,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:27,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:27,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:27,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:27,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228354315] [2021-08-21 11:58:27,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228354315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:27,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660597526] [2021-08-21 11:58:27,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:58:27,176 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:27,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:27,185 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 11:58:27,189 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 11:58:27,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:58:27,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:27,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:27,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:27,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:27,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660597526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:27,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:27,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 11:58:27,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69900764] [2021-08-21 11:58:27,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:58:27,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:27,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:58:27,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:27,819 INFO L87 Difference]: Start difference. First operand 211 states and 565 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:58:28,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:28,065 INFO L93 Difference]: Finished difference Result 326 states and 774 transitions. [2021-08-21 11:58:28,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 11:58:28,065 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 18 [2021-08-21 11:58:28,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:28,066 INFO L225 Difference]: With dead ends: 326 [2021-08-21 11:58:28,066 INFO L226 Difference]: Without dead ends: 322 [2021-08-21 11:58:28,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 199.8ms TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 11:58:28,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-08-21 11:58:28,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 205. [2021-08-21 11:58:28,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.6666666666666665) internal successors, (544), 204 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:28,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 544 transitions. [2021-08-21 11:58:28,071 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 544 transitions. Word has length 18 [2021-08-21 11:58:28,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:28,071 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 544 transitions. [2021-08-21 11:58:28,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:58:28,071 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 544 transitions. [2021-08-21 11:58:28,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:28,072 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:28,072 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:28,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-21 11:58:28,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:28,285 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:28,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:28,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1875158539, now seen corresponding path program 49 times [2021-08-21 11:58:28,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:28,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584967726] [2021-08-21 11:58:28,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:28,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:28,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:28,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584967726] [2021-08-21 11:58:28,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584967726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:28,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138378250] [2021-08-21 11:58:28,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:58:28,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:28,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:28,337 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 11:58:28,340 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 11:58:28,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:28,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:28,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:28,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:28,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138378250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:28,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:28,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 11:58:28,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756226959] [2021-08-21 11:58:28,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:58:28,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:28,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:58:28,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:28,962 INFO L87 Difference]: Start difference. First operand 205 states and 544 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:29,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:29,182 INFO L93 Difference]: Finished difference Result 460 states and 1057 transitions. [2021-08-21 11:58:29,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 11:58:29,182 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:58:29,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:29,184 INFO L225 Difference]: With dead ends: 460 [2021-08-21 11:58:29,184 INFO L226 Difference]: Without dead ends: 451 [2021-08-21 11:58:29,184 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 179.5ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-08-21 11:58:29,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-08-21 11:58:29,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 215. [2021-08-21 11:58:29,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.682242990654206) internal successors, (574), 214 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:29,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 574 transitions. [2021-08-21 11:58:29,188 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 574 transitions. Word has length 18 [2021-08-21 11:58:29,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:29,189 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 574 transitions. [2021-08-21 11:58:29,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:29,189 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 574 transitions. [2021-08-21 11:58:29,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:29,189 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:29,190 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:29,221 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 11:58:29,412 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,SelfDestructingSolverStorable62 [2021-08-21 11:58:29,413 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:29,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:29,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1287413217, now seen corresponding path program 50 times [2021-08-21 11:58:29,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:29,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708145123] [2021-08-21 11:58:29,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:29,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:29,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:29,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708145123] [2021-08-21 11:58:29,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708145123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:29,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485707725] [2021-08-21 11:58:29,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:58:29,457 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:29,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:29,472 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 11:58:29,473 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 11:58:30,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:58:30,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:30,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:30,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:30,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485707725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:30,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:30,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 11:58:30,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244372405] [2021-08-21 11:58:30,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:58:30,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:30,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:58:30,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:30,106 INFO L87 Difference]: Start difference. First operand 215 states and 574 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:30,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:30,293 INFO L93 Difference]: Finished difference Result 374 states and 891 transitions. [2021-08-21 11:58:30,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 11:58:30,293 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:58:30,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:30,295 INFO L225 Difference]: With dead ends: 374 [2021-08-21 11:58:30,295 INFO L226 Difference]: Without dead ends: 365 [2021-08-21 11:58:30,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-08-21 11:58:30,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-08-21 11:58:30,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 215. [2021-08-21 11:58:30,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.6728971962616823) internal successors, (572), 214 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:30,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 572 transitions. [2021-08-21 11:58:30,324 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 572 transitions. Word has length 18 [2021-08-21 11:58:30,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:30,324 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 572 transitions. [2021-08-21 11:58:30,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:30,325 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 572 transitions. [2021-08-21 11:58:30,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:30,325 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:30,325 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:30,349 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 11:58:30,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:30,541 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:30,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:30,541 INFO L82 PathProgramCache]: Analyzing trace with hash -134229365, now seen corresponding path program 51 times [2021-08-21 11:58:30,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:30,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545351428] [2021-08-21 11:58:30,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:30,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:30,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:30,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:30,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545351428] [2021-08-21 11:58:30,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545351428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:30,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956355384] [2021-08-21 11:58:30,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:58:30,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:30,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:30,581 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 11:58:30,583 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 11:58:31,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:58:31,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:31,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:31,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:31,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956355384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:31,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:31,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-21 11:58:31,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12034866] [2021-08-21 11:58:31,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:58:31,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:31,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:58:31,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:31,243 INFO L87 Difference]: Start difference. First operand 215 states and 572 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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 11:58:31,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:31,428 INFO L93 Difference]: Finished difference Result 439 states and 1014 transitions. [2021-08-21 11:58:31,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 11:58:31,428 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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 18 [2021-08-21 11:58:31,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:31,430 INFO L225 Difference]: With dead ends: 439 [2021-08-21 11:58:31,430 INFO L226 Difference]: Without dead ends: 436 [2021-08-21 11:58:31,430 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 149.4ms TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2021-08-21 11:58:31,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-08-21 11:58:31,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 233. [2021-08-21 11:58:31,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.689655172413793) internal successors, (624), 232 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:31,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 624 transitions. [2021-08-21 11:58:31,434 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 624 transitions. Word has length 18 [2021-08-21 11:58:31,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:31,434 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 624 transitions. [2021-08-21 11:58:31,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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 11:58:31,435 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 624 transitions. [2021-08-21 11:58:31,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:31,435 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:31,435 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:31,465 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 11:58:31,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:31,656 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:31,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:31,657 INFO L82 PathProgramCache]: Analyzing trace with hash -598820469, now seen corresponding path program 52 times [2021-08-21 11:58:31,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:31,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073820664] [2021-08-21 11:58:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:31,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:31,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:31,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073820664] [2021-08-21 11:58:31,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073820664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:31,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419092796] [2021-08-21 11:58:31,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:58:31,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:31,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:31,699 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 11:58:31,700 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 11:58:32,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:58:32,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:32,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:32,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:32,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419092796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:32,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:32,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-21 11:58:32,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670846373] [2021-08-21 11:58:32,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:58:32,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:32,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:58:32,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:32,359 INFO L87 Difference]: Start difference. First operand 233 states and 624 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:32,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:32,599 INFO L93 Difference]: Finished difference Result 389 states and 889 transitions. [2021-08-21 11:58:32,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 11:58:32,600 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:58:32,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:32,601 INFO L225 Difference]: With dead ends: 389 [2021-08-21 11:58:32,601 INFO L226 Difference]: Without dead ends: 383 [2021-08-21 11:58:32,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 212.7ms TimeCoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 11:58:32,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-08-21 11:58:32,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 216. [2021-08-21 11:58:32,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.6511627906976742) internal successors, (570), 215 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:32,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 570 transitions. [2021-08-21 11:58:32,605 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 570 transitions. Word has length 18 [2021-08-21 11:58:32,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:32,605 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 570 transitions. [2021-08-21 11:58:32,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:32,605 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 570 transitions. [2021-08-21 11:58:32,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:32,606 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:32,606 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:32,629 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 11:58:32,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:32,825 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:32,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:32,825 INFO L82 PathProgramCache]: Analyzing trace with hash -632419697, now seen corresponding path program 53 times [2021-08-21 11:58:32,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:32,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779773439] [2021-08-21 11:58:32,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:32,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:32,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:32,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779773439] [2021-08-21 11:58:32,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779773439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:32,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95879194] [2021-08-21 11:58:32,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:58:32,866 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:32,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:32,867 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 11:58:32,867 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 11:58:33,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 11:58:33,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:33,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:33,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:33,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95879194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:33,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:33,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-21 11:58:33,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465538469] [2021-08-21 11:58:33,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 11:58:33,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:33,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 11:58:33,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:58:33,533 INFO L87 Difference]: Start difference. First operand 216 states and 570 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:33,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:33,778 INFO L93 Difference]: Finished difference Result 347 states and 818 transitions. [2021-08-21 11:58:33,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 11:58:33,778 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:58:33,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:33,779 INFO L225 Difference]: With dead ends: 347 [2021-08-21 11:58:33,779 INFO L226 Difference]: Without dead ends: 339 [2021-08-21 11:58:33,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 221.3ms TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 11:58:33,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-08-21 11:58:33,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 227. [2021-08-21 11:58:33,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.65929203539823) internal successors, (601), 226 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:33,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 601 transitions. [2021-08-21 11:58:33,783 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 601 transitions. Word has length 18 [2021-08-21 11:58:33,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:33,783 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 601 transitions. [2021-08-21 11:58:33,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:33,783 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 601 transitions. [2021-08-21 11:58:33,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:33,784 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:33,784 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:33,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-21 11:58:33,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:33,985 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:33,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:33,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1160685511, now seen corresponding path program 54 times [2021-08-21 11:58:33,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:33,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342831940] [2021-08-21 11:58:33,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:33,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:33,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:34,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:34,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342831940] [2021-08-21 11:58:34,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342831940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:34,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337690069] [2021-08-21 11:58:34,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:58:34,022 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:34,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:34,023 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 11:58:34,045 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 11:58:34,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:58:34,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:34,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:34,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:34,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:34,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337690069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:34,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:34,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-08-21 11:58:34,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075760804] [2021-08-21 11:58:34,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:58:34,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:34,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:58:34,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:34,743 INFO L87 Difference]: Start difference. First operand 227 states and 601 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:34,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:34,920 INFO L93 Difference]: Finished difference Result 526 states and 1217 transitions. [2021-08-21 11:58:34,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 11:58:34,921 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:58:34,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:34,923 INFO L225 Difference]: With dead ends: 526 [2021-08-21 11:58:34,923 INFO L226 Difference]: Without dead ends: 523 [2021-08-21 11:58:34,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 152.2ms TimeCoverageRelationStatistics Valid=226, Invalid=374, Unknown=0, NotChecked=0, Total=600 [2021-08-21 11:58:34,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-08-21 11:58:34,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 274. [2021-08-21 11:58:34,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.7472527472527473) internal successors, (750), 273 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:34,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 750 transitions. [2021-08-21 11:58:34,929 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 750 transitions. Word has length 18 [2021-08-21 11:58:34,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:34,929 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 750 transitions. [2021-08-21 11:58:34,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:34,929 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 750 transitions. [2021-08-21 11:58:34,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:34,930 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:34,930 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:34,951 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 11:58:35,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-21 11:58:35,145 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:35,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:35,145 INFO L82 PathProgramCache]: Analyzing trace with hash 696094407, now seen corresponding path program 55 times [2021-08-21 11:58:35,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:35,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048045545] [2021-08-21 11:58:35,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:35,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:35,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:35,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048045545] [2021-08-21 11:58:35,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048045545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:35,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686786932] [2021-08-21 11:58:35,181 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:58:35,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:35,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:35,183 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 11:58:35,212 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 11:58:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:35,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:35,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:35,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686786932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:35,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:35,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-08-21 11:58:35,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300889967] [2021-08-21 11:58:35,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:58:35,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:35,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:58:35,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:35,906 INFO L87 Difference]: Start difference. First operand 274 states and 750 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:36,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:36,190 INFO L93 Difference]: Finished difference Result 468 states and 1095 transitions. [2021-08-21 11:58:36,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 11:58:36,191 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:58:36,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:36,192 INFO L225 Difference]: With dead ends: 468 [2021-08-21 11:58:36,192 INFO L226 Difference]: Without dead ends: 464 [2021-08-21 11:58:36,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 11:58:36,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-08-21 11:58:36,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 272. [2021-08-21 11:58:36,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.734317343173432) internal successors, (741), 271 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:36,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 741 transitions. [2021-08-21 11:58:36,198 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 741 transitions. Word has length 18 [2021-08-21 11:58:36,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:36,199 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 741 transitions. [2021-08-21 11:58:36,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:36,199 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 741 transitions. [2021-08-21 11:58:36,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:36,199 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:36,200 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:36,224 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 11:58:36,422 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,SelfDestructingSolverStorable68 [2021-08-21 11:58:36,422 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:36,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:36,422 INFO L82 PathProgramCache]: Analyzing trace with hash 662495179, now seen corresponding path program 56 times [2021-08-21 11:58:36,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:36,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631177927] [2021-08-21 11:58:36,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:36,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:36,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:36,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:36,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631177927] [2021-08-21 11:58:36,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631177927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:36,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107296685] [2021-08-21 11:58:36,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:58:36,464 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:36,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:36,465 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 11:58:36,466 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 11:58:37,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:58:37,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:37,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:37,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:37,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107296685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:37,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:37,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-21 11:58:37,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647302195] [2021-08-21 11:58:37,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 11:58:37,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:37,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 11:58:37,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:58:37,171 INFO L87 Difference]: Start difference. First operand 272 states and 741 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:37,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:37,423 INFO L93 Difference]: Finished difference Result 487 states and 1167 transitions. [2021-08-21 11:58:37,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 11:58:37,424 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:58:37,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:37,425 INFO L225 Difference]: With dead ends: 487 [2021-08-21 11:58:37,425 INFO L226 Difference]: Without dead ends: 479 [2021-08-21 11:58:37,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 224.7ms TimeCoverageRelationStatistics Valid=387, Invalid=873, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 11:58:37,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-08-21 11:58:37,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 293. [2021-08-21 11:58:37,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.791095890410959) internal successors, (815), 292 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:37,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 815 transitions. [2021-08-21 11:58:37,431 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 815 transitions. Word has length 18 [2021-08-21 11:58:37,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:37,431 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 815 transitions. [2021-08-21 11:58:37,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:37,431 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 815 transitions. [2021-08-21 11:58:37,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:37,432 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:37,432 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:37,454 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 11:58:37,646 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,SelfDestructingSolverStorable69 [2021-08-21 11:58:37,646 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:37,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:37,646 INFO L82 PathProgramCache]: Analyzing trace with hash -379080889, now seen corresponding path program 57 times [2021-08-21 11:58:37,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:37,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231729821] [2021-08-21 11:58:37,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:37,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:37,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:37,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231729821] [2021-08-21 11:58:37,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231729821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:37,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569038639] [2021-08-21 11:58:37,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:58:37,702 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:37,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:37,703 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 11:58:37,704 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 11:58:38,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:58:38,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:38,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:38,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:38,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569038639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:38,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:38,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 11:58:38,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613511607] [2021-08-21 11:58:38,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:58:38,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:38,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:58:38,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:58:38,442 INFO L87 Difference]: Start difference. First operand 293 states and 815 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:38,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:38,703 INFO L93 Difference]: Finished difference Result 466 states and 1157 transitions. [2021-08-21 11:58:38,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 11:58:38,703 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:58:38,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:38,705 INFO L225 Difference]: With dead ends: 466 [2021-08-21 11:58:38,705 INFO L226 Difference]: Without dead ends: 454 [2021-08-21 11:58:38,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 245.0ms TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 11:58:38,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-08-21 11:58:38,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 312. [2021-08-21 11:58:38,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.8006430868167205) internal successors, (871), 311 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 11:58:38,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 871 transitions. [2021-08-21 11:58:38,710 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 871 transitions. Word has length 18 [2021-08-21 11:58:38,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:38,710 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 871 transitions. [2021-08-21 11:58:38,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:38,710 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 871 transitions. [2021-08-21 11:58:38,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:38,711 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:38,711 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:38,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:38,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:38,912 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:38,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:38,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1183743623, now seen corresponding path program 58 times [2021-08-21 11:58:38,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:38,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423580062] [2021-08-21 11:58:38,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:38,912 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:38,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:38,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423580062] [2021-08-21 11:58:38,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423580062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:38,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286744542] [2021-08-21 11:58:38,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:58:38,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:38,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:38,954 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 11:58:38,955 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 11:58:39,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:58:39,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:39,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:39,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:39,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:39,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286744542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:39,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:39,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-21 11:58:39,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529508739] [2021-08-21 11:58:39,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 11:58:39,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:39,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 11:58:39,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:58:39,649 INFO L87 Difference]: Start difference. First operand 312 states and 871 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:39,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:39,725 INFO L93 Difference]: Finished difference Result 436 states and 1155 transitions. [2021-08-21 11:58:39,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:58:39,725 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:58:39,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:39,726 INFO L225 Difference]: With dead ends: 436 [2021-08-21 11:58:39,726 INFO L226 Difference]: Without dead ends: 436 [2021-08-21 11:58:39,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:58:39,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-08-21 11:58:39,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 316. [2021-08-21 11:58:39,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.812698412698413) internal successors, (886), 315 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:39,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 886 transitions. [2021-08-21 11:58:39,732 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 886 transitions. Word has length 18 [2021-08-21 11:58:39,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:39,732 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 886 transitions. [2021-08-21 11:58:39,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:39,732 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 886 transitions. [2021-08-21 11:58:39,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:39,733 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:39,733 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:39,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-21 11:58:39,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:39,946 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:39,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:39,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1782526253, now seen corresponding path program 59 times [2021-08-21 11:58:39,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:39,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087123988] [2021-08-21 11:58:39,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:39,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:39,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:39,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:39,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:39,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087123988] [2021-08-21 11:58:39,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087123988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:39,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362010236] [2021-08-21 11:58:39,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:58:39,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:39,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:39,991 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 11:58:39,992 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 11:58:40,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 11:58:40,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:40,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:40,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:40,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362010236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:40,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:40,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 11:58:40,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143683265] [2021-08-21 11:58:40,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:58:40,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:40,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:58:40,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:40,693 INFO L87 Difference]: Start difference. First operand 316 states and 886 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:40,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:40,806 INFO L93 Difference]: Finished difference Result 389 states and 1033 transitions. [2021-08-21 11:58:40,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 11:58:40,806 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:58:40,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:40,807 INFO L225 Difference]: With dead ends: 389 [2021-08-21 11:58:40,807 INFO L226 Difference]: Without dead ends: 389 [2021-08-21 11:58:40,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:58:40,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-08-21 11:58:40,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 319. [2021-08-21 11:58:40,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.8144654088050314) internal successors, (895), 318 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:40,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 895 transitions. [2021-08-21 11:58:40,813 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 895 transitions. Word has length 18 [2021-08-21 11:58:40,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:40,814 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 895 transitions. [2021-08-21 11:58:40,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:40,814 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 895 transitions. [2021-08-21 11:58:40,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:40,815 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:40,815 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:40,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-21 11:58:41,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:41,029 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:41,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:41,029 INFO L82 PathProgramCache]: Analyzing trace with hash 324257867, now seen corresponding path program 60 times [2021-08-21 11:58:41,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:41,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686564081] [2021-08-21 11:58:41,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:41,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:41,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:41,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:41,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686564081] [2021-08-21 11:58:41,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686564081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:41,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282059200] [2021-08-21 11:58:41,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:58:41,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:41,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:41,077 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 11:58:41,082 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 11:58:41,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 11:58:41,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:41,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:41,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:41,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:41,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282059200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:41,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:41,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 11:58:41,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405398375] [2021-08-21 11:58:41,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:58:41,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:41,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:58:41,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:41,789 INFO L87 Difference]: Start difference. First operand 319 states and 895 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:41,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:41,943 INFO L93 Difference]: Finished difference Result 399 states and 1054 transitions. [2021-08-21 11:58:41,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 11:58:41,943 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:58:41,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:41,945 INFO L225 Difference]: With dead ends: 399 [2021-08-21 11:58:41,945 INFO L226 Difference]: Without dead ends: 399 [2021-08-21 11:58:41,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:58:41,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-08-21 11:58:41,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 322. [2021-08-21 11:58:41,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.8161993769470404) internal successors, (904), 321 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:41,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 904 transitions. [2021-08-21 11:58:41,952 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 904 transitions. Word has length 18 [2021-08-21 11:58:41,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:41,952 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 904 transitions. [2021-08-21 11:58:41,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:41,952 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 904 transitions. [2021-08-21 11:58:41,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:41,953 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:41,953 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:41,974 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 11:58:42,153 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,SelfDestructingSolverStorable73 [2021-08-21 11:58:42,154 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:42,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:42,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1824538669, now seen corresponding path program 61 times [2021-08-21 11:58:42,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:42,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167451789] [2021-08-21 11:58:42,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:42,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:42,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:42,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:42,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167451789] [2021-08-21 11:58:42,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167451789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:42,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281468923] [2021-08-21 11:58:42,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:58:42,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:42,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:42,202 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 11:58:42,203 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 11:58:42,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:42,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:42,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:42,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281468923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:42,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:42,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 11:58:42,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411160351] [2021-08-21 11:58:42,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:58:42,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:42,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:58:42,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:42,923 INFO L87 Difference]: Start difference. First operand 322 states and 904 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:43,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:43,152 INFO L93 Difference]: Finished difference Result 497 states and 1220 transitions. [2021-08-21 11:58:43,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 11:58:43,152 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:58:43,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:43,154 INFO L225 Difference]: With dead ends: 497 [2021-08-21 11:58:43,154 INFO L226 Difference]: Without dead ends: 497 [2021-08-21 11:58:43,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 189.7ms TimeCoverageRelationStatistics Valid=259, Invalid=443, Unknown=0, NotChecked=0, Total=702 [2021-08-21 11:58:43,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-08-21 11:58:43,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 319. [2021-08-21 11:58:43,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.8207547169811322) internal successors, (897), 318 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:43,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 897 transitions. [2021-08-21 11:58:43,159 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 897 transitions. Word has length 18 [2021-08-21 11:58:43,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:43,159 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 897 transitions. [2021-08-21 11:58:43,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:43,159 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 897 transitions. [2021-08-21 11:58:43,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:43,159 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:43,160 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:43,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-21 11:58:43,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:43,360 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:43,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:43,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1253083863, now seen corresponding path program 62 times [2021-08-21 11:58:43,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:43,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068626669] [2021-08-21 11:58:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:43,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:43,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:43,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068626669] [2021-08-21 11:58:43,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068626669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:43,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306486804] [2021-08-21 11:58:43,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:58:43,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:43,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:43,412 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 11:58:43,436 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 11:58:44,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:58:44,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:44,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:44,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:44,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:44,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306486804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:44,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:44,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 11:58:44,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391158084] [2021-08-21 11:58:44,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:58:44,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:44,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:58:44,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:44,184 INFO L87 Difference]: Start difference. First operand 319 states and 897 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:44,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:44,399 INFO L93 Difference]: Finished difference Result 422 states and 1069 transitions. [2021-08-21 11:58:44,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 11:58:44,399 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:58:44,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:44,400 INFO L225 Difference]: With dead ends: 422 [2021-08-21 11:58:44,400 INFO L226 Difference]: Without dead ends: 416 [2021-08-21 11:58:44,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 11:58:44,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-08-21 11:58:44,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 313. [2021-08-21 11:58:44,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.8108974358974357) internal successors, (877), 312 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:44,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 877 transitions. [2021-08-21 11:58:44,405 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 877 transitions. Word has length 18 [2021-08-21 11:58:44,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:44,405 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 877 transitions. [2021-08-21 11:58:44,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:44,405 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 877 transitions. [2021-08-21 11:58:44,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:44,406 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:44,406 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:44,424 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 11:58:44,608 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,SelfDestructingSolverStorable75 [2021-08-21 11:58:44,608 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:44,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:44,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1110311887, now seen corresponding path program 63 times [2021-08-21 11:58:44,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:44,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513995251] [2021-08-21 11:58:44,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:44,608 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:44,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:44,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:44,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513995251] [2021-08-21 11:58:44,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513995251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:44,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913357586] [2021-08-21 11:58:44,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:58:44,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:44,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:44,651 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 11:58:44,652 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 11:58:45,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:58:45,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:45,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:45,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:45,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913357586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:45,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:45,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 11:58:45,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088403213] [2021-08-21 11:58:45,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:58:45,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:45,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:58:45,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:45,392 INFO L87 Difference]: Start difference. First operand 313 states and 877 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:45,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:45,573 INFO L93 Difference]: Finished difference Result 573 states and 1416 transitions. [2021-08-21 11:58:45,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 11:58:45,574 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:58:45,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:45,576 INFO L225 Difference]: With dead ends: 573 [2021-08-21 11:58:45,576 INFO L226 Difference]: Without dead ends: 570 [2021-08-21 11:58:45,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2021-08-21 11:58:45,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-08-21 11:58:45,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 353. [2021-08-21 11:58:45,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.875) internal successors, (1012), 352 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:45,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1012 transitions. [2021-08-21 11:58:45,584 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1012 transitions. Word has length 18 [2021-08-21 11:58:45,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:45,584 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 1012 transitions. [2021-08-21 11:58:45,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:45,584 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1012 transitions. [2021-08-21 11:58:45,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:45,585 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:45,585 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:45,611 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 11:58:45,800 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,SelfDestructingSolverStorable76 [2021-08-21 11:58:45,801 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:45,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:45,801 INFO L82 PathProgramCache]: Analyzing trace with hash 645720783, now seen corresponding path program 64 times [2021-08-21 11:58:45,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:45,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674630850] [2021-08-21 11:58:45,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:45,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:45,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:45,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:45,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674630850] [2021-08-21 11:58:45,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674630850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:45,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989802038] [2021-08-21 11:58:45,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:58:45,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:45,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:45,862 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 11:58:45,863 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 11:58:46,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:58:46,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:46,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:46,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:46,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989802038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:46,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:46,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 11:58:46,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783163942] [2021-08-21 11:58:46,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:58:46,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:46,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:58:46,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:46,599 INFO L87 Difference]: Start difference. First operand 353 states and 1012 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:58:46,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:46,845 INFO L93 Difference]: Finished difference Result 554 states and 1385 transitions. [2021-08-21 11:58:46,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 11:58:46,846 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 18 [2021-08-21 11:58:46,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:46,847 INFO L225 Difference]: With dead ends: 554 [2021-08-21 11:58:46,847 INFO L226 Difference]: Without dead ends: 550 [2021-08-21 11:58:46,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 195.7ms TimeCoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2021-08-21 11:58:46,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-08-21 11:58:46,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 334. [2021-08-21 11:58:46,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.8228228228228227) internal successors, (940), 333 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 11:58:46,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 940 transitions. [2021-08-21 11:58:46,853 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 940 transitions. Word has length 18 [2021-08-21 11:58:46,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:46,853 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 940 transitions. [2021-08-21 11:58:46,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:58:46,853 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 940 transitions. [2021-08-21 11:58:46,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:46,853 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:46,854 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:46,871 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 11:58:47,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-21 11:58:47,054 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:47,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:47,054 INFO L82 PathProgramCache]: Analyzing trace with hash 612121555, now seen corresponding path program 65 times [2021-08-21 11:58:47,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:47,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080176406] [2021-08-21 11:58:47,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:47,055 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:47,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:47,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080176406] [2021-08-21 11:58:47,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080176406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:47,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22334992] [2021-08-21 11:58:47,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:58:47,097 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:47,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:47,098 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 11:58:47,100 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 11:58:47,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:58:47,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:47,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:47,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:47,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22334992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:47,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:47,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 11:58:47,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730327166] [2021-08-21 11:58:47,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:58:47,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:47,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:58:47,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:47,843 INFO L87 Difference]: Start difference. First operand 334 states and 940 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:58:48,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:48,050 INFO L93 Difference]: Finished difference Result 542 states and 1356 transitions. [2021-08-21 11:58:48,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 11:58:48,051 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 18 [2021-08-21 11:58:48,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:48,053 INFO L225 Difference]: With dead ends: 542 [2021-08-21 11:58:48,053 INFO L226 Difference]: Without dead ends: 534 [2021-08-21 11:58:48,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 189.0ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-08-21 11:58:48,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-08-21 11:58:48,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 348. [2021-08-21 11:58:48,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.829971181556196) internal successors, (982), 347 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:48,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 982 transitions. [2021-08-21 11:58:48,060 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 982 transitions. Word has length 18 [2021-08-21 11:58:48,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:48,060 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 982 transitions. [2021-08-21 11:58:48,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:58:48,060 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 982 transitions. [2021-08-21 11:58:48,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:48,061 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:48,061 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:48,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-21 11:58:48,280 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,SelfDestructingSolverStorable78 [2021-08-21 11:58:48,281 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:48,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:48,281 INFO L82 PathProgramCache]: Analyzing trace with hash -429454513, now seen corresponding path program 66 times [2021-08-21 11:58:48,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:48,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208974079] [2021-08-21 11:58:48,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:48,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:48,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:48,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:48,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208974079] [2021-08-21 11:58:48,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208974079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:48,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254967866] [2021-08-21 11:58:48,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:58:48,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:48,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:48,338 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 11:58:48,355 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 11:58:49,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 11:58:49,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:49,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:49,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:49,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254967866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:49,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:49,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 11:58:49,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889208869] [2021-08-21 11:58:49,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:58:49,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:49,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:58:49,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:49,100 INFO L87 Difference]: Start difference. First operand 348 states and 982 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:58:49,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:49,251 INFO L93 Difference]: Finished difference Result 473 states and 1218 transitions. [2021-08-21 11:58:49,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 11:58:49,251 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 18 [2021-08-21 11:58:49,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:49,253 INFO L225 Difference]: With dead ends: 473 [2021-08-21 11:58:49,253 INFO L226 Difference]: Without dead ends: 467 [2021-08-21 11:58:49,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 151.2ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-08-21 11:58:49,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-08-21 11:58:49,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 349. [2021-08-21 11:58:49,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.82183908045977) internal successors, (982), 348 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:49,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 982 transitions. [2021-08-21 11:58:49,259 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 982 transitions. Word has length 18 [2021-08-21 11:58:49,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:49,259 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 982 transitions. [2021-08-21 11:58:49,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:58:49,259 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 982 transitions. [2021-08-21 11:58:49,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:49,260 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:49,260 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:49,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-21 11:58:49,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:49,467 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:49,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:49,467 INFO L82 PathProgramCache]: Analyzing trace with hash -2002349101, now seen corresponding path program 67 times [2021-08-21 11:58:49,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:49,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914116462] [2021-08-21 11:58:49,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:49,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:49,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:49,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914116462] [2021-08-21 11:58:49,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914116462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:49,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226779127] [2021-08-21 11:58:49,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:58:49,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:49,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:49,511 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 11:58:49,512 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 11:58:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:50,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:50,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:50,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226779127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:50,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:50,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-21 11:58:50,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964358773] [2021-08-21 11:58:50,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 11:58:50,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:50,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 11:58:50,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:58:50,264 INFO L87 Difference]: Start difference. First operand 349 states and 982 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:50,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:50,323 INFO L93 Difference]: Finished difference Result 405 states and 1105 transitions. [2021-08-21 11:58:50,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 11:58:50,323 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:58:50,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:50,325 INFO L225 Difference]: With dead ends: 405 [2021-08-21 11:58:50,325 INFO L226 Difference]: Without dead ends: 397 [2021-08-21 11:58:50,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:58:50,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-08-21 11:58:50,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 349. [2021-08-21 11:58:50,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.8189655172413794) internal successors, (981), 348 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:50,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 981 transitions. [2021-08-21 11:58:50,331 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 981 transitions. Word has length 18 [2021-08-21 11:58:50,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:50,332 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 981 transitions. [2021-08-21 11:58:50,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:50,332 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 981 transitions. [2021-08-21 11:58:50,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:50,332 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:50,332 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:50,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-21 11:58:50,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:50,533 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:50,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:50,533 INFO L82 PathProgramCache]: Analyzing trace with hash 752388103, now seen corresponding path program 68 times [2021-08-21 11:58:50,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:50,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896762945] [2021-08-21 11:58:50,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:50,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:50,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:50,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896762945] [2021-08-21 11:58:50,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896762945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:50,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786196620] [2021-08-21 11:58:50,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:58:50,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:50,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:50,586 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 11:58:50,587 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 11:58:51,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:58:51,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:51,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:51,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:51,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786196620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:51,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:51,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-21 11:58:51,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576307168] [2021-08-21 11:58:51,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 11:58:51,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:51,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 11:58:51,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:58:51,362 INFO L87 Difference]: Start difference. First operand 349 states and 981 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:51,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:51,592 INFO L93 Difference]: Finished difference Result 447 states and 1174 transitions. [2021-08-21 11:58:51,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 11:58:51,593 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:58:51,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:51,594 INFO L225 Difference]: With dead ends: 447 [2021-08-21 11:58:51,595 INFO L226 Difference]: Without dead ends: 447 [2021-08-21 11:58:51,595 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 185.4ms TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2021-08-21 11:58:51,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-08-21 11:58:51,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 354. [2021-08-21 11:58:51,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.818696883852691) internal successors, (995), 353 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:51,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 995 transitions. [2021-08-21 11:58:51,601 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 995 transitions. Word has length 18 [2021-08-21 11:58:51,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:51,601 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 995 transitions. [2021-08-21 11:58:51,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:51,601 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 995 transitions. [2021-08-21 11:58:51,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:51,602 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:51,602 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:51,627 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 11:58:51,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:51,820 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:51,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:51,821 INFO L82 PathProgramCache]: Analyzing trace with hash -549996793, now seen corresponding path program 69 times [2021-08-21 11:58:51,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:51,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459620730] [2021-08-21 11:58:51,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:51,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:51,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:51,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:51,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459620730] [2021-08-21 11:58:51,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459620730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:51,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160384533] [2021-08-21 11:58:51,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:58:51,863 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:51,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:51,864 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 11:58:51,865 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 11:58:52,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:58:52,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:52,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:52,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:52,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160384533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:52,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:52,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-21 11:58:52,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477462460] [2021-08-21 11:58:52,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:58:52,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:52,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:58:52,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:52,670 INFO L87 Difference]: Start difference. First operand 354 states and 995 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:58:52,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:52,832 INFO L93 Difference]: Finished difference Result 485 states and 1256 transitions. [2021-08-21 11:58:52,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 11:58:52,832 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 18 [2021-08-21 11:58:52,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:52,834 INFO L225 Difference]: With dead ends: 485 [2021-08-21 11:58:52,834 INFO L226 Difference]: Without dead ends: 483 [2021-08-21 11:58:52,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 145.5ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-08-21 11:58:52,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-08-21 11:58:52,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 352. [2021-08-21 11:58:52,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.8290598290598292) internal successors, (993), 351 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:52,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 993 transitions. [2021-08-21 11:58:52,840 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 993 transitions. Word has length 18 [2021-08-21 11:58:52,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:52,841 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 993 transitions. [2021-08-21 11:58:52,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:58:52,841 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 993 transitions. [2021-08-21 11:58:52,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:52,841 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:52,841 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:52,861 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 11:58:53,048 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,SelfDestructingSolverStorable82 [2021-08-21 11:58:53,049 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:53,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:53,049 INFO L82 PathProgramCache]: Analyzing trace with hash -592009209, now seen corresponding path program 70 times [2021-08-21 11:58:53,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:53,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913445721] [2021-08-21 11:58:53,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:53,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:53,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:53,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:53,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913445721] [2021-08-21 11:58:53,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913445721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:53,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293726335] [2021-08-21 11:58:53,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:58:53,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:53,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:53,087 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 11:58:53,089 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 11:58:53,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:58:53,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:53,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:53,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:53,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:53,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293726335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:53,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:53,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-21 11:58:53,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222001794] [2021-08-21 11:58:53,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:58:53,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:53,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:58:53,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:53,875 INFO L87 Difference]: Start difference. First operand 352 states and 993 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:58:54,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:54,066 INFO L93 Difference]: Finished difference Result 553 states and 1393 transitions. [2021-08-21 11:58:54,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 11:58:54,066 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 18 [2021-08-21 11:58:54,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:54,067 INFO L225 Difference]: With dead ends: 553 [2021-08-21 11:58:54,067 INFO L226 Difference]: Without dead ends: 553 [2021-08-21 11:58:54,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2021-08-21 11:58:54,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-08-21 11:58:54,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 355. [2021-08-21 11:58:54,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.824858757062147) internal successors, (1000), 354 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:54,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1000 transitions. [2021-08-21 11:58:54,073 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1000 transitions. Word has length 18 [2021-08-21 11:58:54,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:54,073 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1000 transitions. [2021-08-21 11:58:54,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:58:54,073 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1000 transitions. [2021-08-21 11:58:54,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:54,073 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:54,074 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:54,091 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 11:58:54,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:54,274 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:54,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:54,274 INFO L82 PathProgramCache]: Analyzing trace with hash -20554403, now seen corresponding path program 71 times [2021-08-21 11:58:54,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:54,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816495453] [2021-08-21 11:58:54,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:54,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:54,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:54,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:54,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816495453] [2021-08-21 11:58:54,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816495453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:54,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277977655] [2021-08-21 11:58:54,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:58:54,317 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:54,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:54,317 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 11:58:54,318 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 11:58:55,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 11:58:55,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:55,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:55,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:55,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277977655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:55,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:55,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-21 11:58:55,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430066462] [2021-08-21 11:58:55,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:58:55,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:55,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:58:55,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:55,106 INFO L87 Difference]: Start difference. First operand 355 states and 1000 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:58:55,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:55,365 INFO L93 Difference]: Finished difference Result 530 states and 1319 transitions. [2021-08-21 11:58:55,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 11:58:55,366 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 18 [2021-08-21 11:58:55,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:55,367 INFO L225 Difference]: With dead ends: 530 [2021-08-21 11:58:55,367 INFO L226 Difference]: Without dead ends: 521 [2021-08-21 11:58:55,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 11:58:55,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-08-21 11:58:55,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 341. [2021-08-21 11:58:55,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.8) internal successors, (952), 340 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:55,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 952 transitions. [2021-08-21 11:58:55,372 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 952 transitions. Word has length 18 [2021-08-21 11:58:55,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:55,372 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 952 transitions. [2021-08-21 11:58:55,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:58:55,372 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 952 transitions. [2021-08-21 11:58:55,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:55,373 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:55,373 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:55,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-21 11:58:55,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:55,574 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:55,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:55,574 INFO L82 PathProgramCache]: Analyzing trace with hash 514675399, now seen corresponding path program 72 times [2021-08-21 11:58:55,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:55,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552458912] [2021-08-21 11:58:55,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:55,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:55,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:55,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:55,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552458912] [2021-08-21 11:58:55,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552458912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:55,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050667522] [2021-08-21 11:58:55,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:58:55,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:55,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:55,624 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 11:58:55,625 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 11:58:56,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 11:58:56,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:56,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:56,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:56,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050667522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:56,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:56,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-21 11:58:56,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403427042] [2021-08-21 11:58:56,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 11:58:56,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:56,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 11:58:56,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:58:56,428 INFO L87 Difference]: Start difference. First operand 341 states and 952 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:56,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:56,667 INFO L93 Difference]: Finished difference Result 483 states and 1236 transitions. [2021-08-21 11:58:56,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 11:58:56,667 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:58:56,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:56,668 INFO L225 Difference]: With dead ends: 483 [2021-08-21 11:58:56,668 INFO L226 Difference]: Without dead ends: 471 [2021-08-21 11:58:56,668 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 213.7ms TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 11:58:56,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-08-21 11:58:56,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 348. [2021-08-21 11:58:56,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.809798270893372) internal successors, (975), 347 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:56,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 975 transitions. [2021-08-21 11:58:56,673 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 975 transitions. Word has length 18 [2021-08-21 11:58:56,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:56,673 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 975 transitions. [2021-08-21 11:58:56,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:56,673 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 975 transitions. [2021-08-21 11:58:56,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:56,674 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:56,674 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:56,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:56,874 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,SelfDestructingSolverStorable85 [2021-08-21 11:58:56,875 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:56,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:56,875 INFO L82 PathProgramCache]: Analyzing trace with hash 2025321811, now seen corresponding path program 73 times [2021-08-21 11:58:56,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:56,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526291109] [2021-08-21 11:58:56,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:56,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:56,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:56,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526291109] [2021-08-21 11:58:56,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526291109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:56,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981843888] [2021-08-21 11:58:56,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:58:56,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:56,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:56,937 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 11:58:56,938 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 11:58:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:57,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:57,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:57,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981843888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:57,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:57,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 11:58:57,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566928765] [2021-08-21 11:58:57,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:58:57,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:57,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:58:57,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:58:57,768 INFO L87 Difference]: Start difference. First operand 348 states and 975 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:58,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:58,006 INFO L93 Difference]: Finished difference Result 521 states and 1344 transitions. [2021-08-21 11:58:58,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 11:58:58,006 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:58:58,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:58,007 INFO L225 Difference]: With dead ends: 521 [2021-08-21 11:58:58,007 INFO L226 Difference]: Without dead ends: 521 [2021-08-21 11:58:58,007 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 208.2ms TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2021-08-21 11:58:58,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-08-21 11:58:58,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 368. [2021-08-21 11:58:58,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.8147138964577656) internal successors, (1033), 367 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:58,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1033 transitions. [2021-08-21 11:58:58,012 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1033 transitions. Word has length 18 [2021-08-21 11:58:58,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:58,012 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 1033 transitions. [2021-08-21 11:58:58,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:58,013 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1033 transitions. [2021-08-21 11:58:58,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:58,013 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:58,013 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:58,031 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 11:58:58,213 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,SelfDestructingSolverStorable86 [2021-08-21 11:58:58,216 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:58,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:58,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1882087477, now seen corresponding path program 74 times [2021-08-21 11:58:58,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:58,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514605897] [2021-08-21 11:58:58,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:58,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:58,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:58,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514605897] [2021-08-21 11:58:58,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514605897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:58,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564344970] [2021-08-21 11:58:58,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:58:58,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:58,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:58,262 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 11:58:58,291 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 11:58:59,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:58:59,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:59,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:58:59,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:59,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:59,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564344970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:59,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:59,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-21 11:58:59,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672486345] [2021-08-21 11:58:59,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 11:58:59,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:59,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 11:58:59,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:58:59,132 INFO L87 Difference]: Start difference. First operand 368 states and 1033 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:59,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:59,334 INFO L93 Difference]: Finished difference Result 613 states and 1567 transitions. [2021-08-21 11:58:59,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 11:58:59,335 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:58:59,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:59,336 INFO L225 Difference]: With dead ends: 613 [2021-08-21 11:58:59,336 INFO L226 Difference]: Without dead ends: 613 [2021-08-21 11:58:59,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 174.2ms TimeCoverageRelationStatistics Valid=230, Invalid=472, Unknown=0, NotChecked=0, Total=702 [2021-08-21 11:58:59,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-08-21 11:58:59,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 413. [2021-08-21 11:58:59,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.8567961165048543) internal successors, (1177), 412 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:59,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1177 transitions. [2021-08-21 11:58:59,343 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1177 transitions. Word has length 18 [2021-08-21 11:58:59,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:59,343 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1177 transitions. [2021-08-21 11:58:59,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:59,343 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1177 transitions. [2021-08-21 11:58:59,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:58:59,344 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:59,344 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:59,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-21 11:58:59,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:59,544 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:59,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:59,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1038301613, now seen corresponding path program 75 times [2021-08-21 11:58:59,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:59,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534754034] [2021-08-21 11:58:59,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:59,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:59,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:59,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:59,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534754034] [2021-08-21 11:58:59,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534754034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:59,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182980447] [2021-08-21 11:58:59,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:58:59,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:59,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:59,592 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 11:58:59,619 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 11:59:00,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:59:00,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:00,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:59:00,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:00,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182980447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:00,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:00,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-08-21 11:59:00,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377680178] [2021-08-21 11:59:00,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:59:00,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:00,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:59:00,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:00,577 INFO L87 Difference]: Start difference. First operand 413 states and 1177 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:00,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:00,773 INFO L93 Difference]: Finished difference Result 723 states and 1864 transitions. [2021-08-21 11:59:00,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 11:59:00,774 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:00,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:00,775 INFO L225 Difference]: With dead ends: 723 [2021-08-21 11:59:00,775 INFO L226 Difference]: Without dead ends: 723 [2021-08-21 11:59:00,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=226, Invalid=374, Unknown=0, NotChecked=0, Total=600 [2021-08-21 11:59:00,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-08-21 11:59:00,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 473. [2021-08-21 11:59:00,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.9110169491525424) internal successors, (1374), 472 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:00,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1374 transitions. [2021-08-21 11:59:00,782 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1374 transitions. Word has length 18 [2021-08-21 11:59:00,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:00,782 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 1374 transitions. [2021-08-21 11:59:00,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:00,783 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1374 transitions. [2021-08-21 11:59:00,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:00,783 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:00,783 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:00,802 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 11:59:00,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:00,984 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:00,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:00,984 INFO L82 PathProgramCache]: Analyzing trace with hash -466846807, now seen corresponding path program 76 times [2021-08-21 11:59:00,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:00,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293243614] [2021-08-21 11:59:00,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:00,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:01,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:01,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:01,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293243614] [2021-08-21 11:59:01,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293243614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:01,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699435116] [2021-08-21 11:59:01,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:59:01,016 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:01,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:01,016 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 11:59:01,017 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 11:59:01,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:59:01,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:01,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:59:01,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:01,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699435116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:01,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:01,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-08-21 11:59:01,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475972496] [2021-08-21 11:59:01,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:59:01,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:01,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:59:01,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:01,862 INFO L87 Difference]: Start difference. First operand 473 states and 1374 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:02,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:02,168 INFO L93 Difference]: Finished difference Result 693 states and 1787 transitions. [2021-08-21 11:59:02,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 11:59:02,168 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:02,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:02,169 INFO L225 Difference]: With dead ends: 693 [2021-08-21 11:59:02,169 INFO L226 Difference]: Without dead ends: 687 [2021-08-21 11:59:02,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 256.2ms TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 11:59:02,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-08-21 11:59:02,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 463. [2021-08-21 11:59:02,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.8896103896103895) internal successors, (1335), 462 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 11:59:02,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1335 transitions. [2021-08-21 11:59:02,177 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1335 transitions. Word has length 18 [2021-08-21 11:59:02,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:02,177 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 1335 transitions. [2021-08-21 11:59:02,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:02,177 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1335 transitions. [2021-08-21 11:59:02,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:02,178 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:02,178 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:02,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-21 11:59:02,380 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,SelfDestructingSolverStorable89 [2021-08-21 11:59:02,380 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:02,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:02,381 INFO L82 PathProgramCache]: Analyzing trace with hash 68382995, now seen corresponding path program 77 times [2021-08-21 11:59:02,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:02,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089175623] [2021-08-21 11:59:02,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:02,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:02,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:02,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:02,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089175623] [2021-08-21 11:59:02,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089175623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:02,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40782759] [2021-08-21 11:59:02,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:59:02,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:02,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:02,418 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 11:59:02,419 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 11:59:03,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:59:03,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:03,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:59:03,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:03,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:03,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40782759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:03,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:03,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-21 11:59:03,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873498815] [2021-08-21 11:59:03,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 11:59:03,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:03,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 11:59:03,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:03,292 INFO L87 Difference]: Start difference. First operand 463 states and 1335 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:03,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:03,549 INFO L93 Difference]: Finished difference Result 706 states and 1819 transitions. [2021-08-21 11:59:03,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 11:59:03,549 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:03,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:03,550 INFO L225 Difference]: With dead ends: 706 [2021-08-21 11:59:03,550 INFO L226 Difference]: Without dead ends: 694 [2021-08-21 11:59:03,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 230.9ms TimeCoverageRelationStatistics Valid=387, Invalid=873, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 11:59:03,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-08-21 11:59:03,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 476. [2021-08-21 11:59:03,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.903157894736842) internal successors, (1379), 475 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:03,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1379 transitions. [2021-08-21 11:59:03,558 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1379 transitions. Word has length 18 [2021-08-21 11:59:03,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:03,558 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1379 transitions. [2021-08-21 11:59:03,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:03,558 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1379 transitions. [2021-08-21 11:59:03,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:03,559 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:03,559 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:03,577 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 11:59:03,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:03,759 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:03,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:03,760 INFO L82 PathProgramCache]: Analyzing trace with hash -519362327, now seen corresponding path program 78 times [2021-08-21 11:59:03,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:03,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170613334] [2021-08-21 11:59:03,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:03,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:03,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:03,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:03,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170613334] [2021-08-21 11:59:03,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170613334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:03,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758657093] [2021-08-21 11:59:03,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:59:03,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:03,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:03,802 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 11:59:03,803 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 11:59:04,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 11:59:04,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:04,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:59:04,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:04,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758657093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:04,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:04,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 11:59:04,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708599427] [2021-08-21 11:59:04,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:59:04,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:04,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:59:04,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:59:04,655 INFO L87 Difference]: Start difference. First operand 476 states and 1379 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:04,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:04,895 INFO L93 Difference]: Finished difference Result 674 states and 1783 transitions. [2021-08-21 11:59:04,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 11:59:04,895 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:04,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:04,897 INFO L225 Difference]: With dead ends: 674 [2021-08-21 11:59:04,897 INFO L226 Difference]: Without dead ends: 656 [2021-08-21 11:59:04,897 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 229.2ms TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 11:59:04,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-08-21 11:59:04,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 498. [2021-08-21 11:59:04,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 2.9014084507042255) internal successors, (1442), 497 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:04,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1442 transitions. [2021-08-21 11:59:04,904 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1442 transitions. Word has length 18 [2021-08-21 11:59:04,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:04,904 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1442 transitions. [2021-08-21 11:59:04,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:04,904 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1442 transitions. [2021-08-21 11:59:04,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:59:04,905 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:04,905 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:04,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-21 11:59:05,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:05,105 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:05,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:05,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1008686311, now seen corresponding path program 79 times [2021-08-21 11:59:05,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:05,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206189101] [2021-08-21 11:59:05,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:05,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:05,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:05,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206189101] [2021-08-21 11:59:05,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206189101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:05,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366307611] [2021-08-21 11:59:05,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:59:05,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:05,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:05,260 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 11:59:05,262 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 11:59:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:06,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 11:59:06,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:06,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:06,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366307611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:06,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:06,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-08-21 11:59:06,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089290117] [2021-08-21 11:59:06,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 11:59:06,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:06,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 11:59:06,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:06,275 INFO L87 Difference]: Start difference. First operand 498 states and 1442 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:06,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:06,528 INFO L93 Difference]: Finished difference Result 678 states and 1761 transitions. [2021-08-21 11:59:06,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 11:59:06,528 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 11:59:06,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:06,529 INFO L225 Difference]: With dead ends: 678 [2021-08-21 11:59:06,530 INFO L226 Difference]: Without dead ends: 655 [2021-08-21 11:59:06,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 214.6ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-08-21 11:59:06,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-08-21 11:59:06,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 531. [2021-08-21 11:59:06,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 2.8679245283018866) internal successors, (1520), 530 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:06,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1520 transitions. [2021-08-21 11:59:06,539 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1520 transitions. Word has length 19 [2021-08-21 11:59:06,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:06,539 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 1520 transitions. [2021-08-21 11:59:06,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:06,539 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1520 transitions. [2021-08-21 11:59:06,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:59:06,540 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:06,541 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:06,568 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 11:59:06,764 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,SelfDestructingSolverStorable92 [2021-08-21 11:59:06,764 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:06,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:06,764 INFO L82 PathProgramCache]: Analyzing trace with hash -455666133, now seen corresponding path program 80 times [2021-08-21 11:59:06,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:06,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498145020] [2021-08-21 11:59:06,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:06,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:06,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:06,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:06,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498145020] [2021-08-21 11:59:06,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498145020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:06,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108073318] [2021-08-21 11:59:06,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:59:06,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:06,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:06,898 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 11:59:06,899 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 11:59:07,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:59:07,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:07,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 11:59:07,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:08,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:08,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108073318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:08,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:08,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-08-21 11:59:08,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181618721] [2021-08-21 11:59:08,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 11:59:08,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:08,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 11:59:08,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:08,014 INFO L87 Difference]: Start difference. First operand 531 states and 1520 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:08,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:08,162 INFO L93 Difference]: Finished difference Result 714 states and 1853 transitions. [2021-08-21 11:59:08,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 11:59:08,163 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 11:59:08,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:08,164 INFO L225 Difference]: With dead ends: 714 [2021-08-21 11:59:08,164 INFO L226 Difference]: Without dead ends: 707 [2021-08-21 11:59:08,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 154.8ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-21 11:59:08,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-08-21 11:59:08,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 555. [2021-08-21 11:59:08,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.895306859205776) internal successors, (1604), 554 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:08,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1604 transitions. [2021-08-21 11:59:08,173 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1604 transitions. Word has length 19 [2021-08-21 11:59:08,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:08,173 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 1604 transitions. [2021-08-21 11:59:08,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:08,174 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1604 transitions. [2021-08-21 11:59:08,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:59:08,174 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:08,174 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:08,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:08,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:08,375 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:08,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:08,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1159036591, now seen corresponding path program 81 times [2021-08-21 11:59:08,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:08,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707663522] [2021-08-21 11:59:08,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:08,376 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:08,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:08,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:08,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:08,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707663522] [2021-08-21 11:59:08,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707663522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:08,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533699863] [2021-08-21 11:59:08,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:59:08,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:08,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:08,505 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 11:59:08,532 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 11:59:09,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:59:09,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:09,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 11:59:09,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:09,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533699863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:09,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:09,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-21 11:59:09,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144133447] [2021-08-21 11:59:09,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:59:09,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:09,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:59:09,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:59:09,645 INFO L87 Difference]: Start difference. First operand 555 states and 1604 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:09,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:09,821 INFO L93 Difference]: Finished difference Result 700 states and 1833 transitions. [2021-08-21 11:59:09,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 11:59:09,821 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 11:59:09,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:09,823 INFO L225 Difference]: With dead ends: 700 [2021-08-21 11:59:09,823 INFO L226 Difference]: Without dead ends: 684 [2021-08-21 11:59:09,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 185.6ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:59:09,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-08-21 11:59:09,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 542. [2021-08-21 11:59:09,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.8927911275415896) internal successors, (1565), 541 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:09,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1565 transitions. [2021-08-21 11:59:09,831 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1565 transitions. Word has length 19 [2021-08-21 11:59:09,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:09,831 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1565 transitions. [2021-08-21 11:59:09,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:09,831 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1565 transitions. [2021-08-21 11:59:09,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:59:09,832 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:09,832 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:09,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-08-21 11:59:10,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:10,033 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:10,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:10,033 INFO L82 PathProgramCache]: Analyzing trace with hash 115788673, now seen corresponding path program 82 times [2021-08-21 11:59:10,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:10,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909523414] [2021-08-21 11:59:10,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:10,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:10,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:10,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:10,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:10,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909523414] [2021-08-21 11:59:10,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909523414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:10,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47433777] [2021-08-21 11:59:10,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:59:10,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:10,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:10,167 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 11:59:10,167 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 11:59:10,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:59:10,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:10,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 11:59:10,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:11,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:11,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47433777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:11,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:11,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-08-21 11:59:11,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004923969] [2021-08-21 11:59:11,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 11:59:11,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:11,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 11:59:11,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:11,248 INFO L87 Difference]: Start difference. First operand 542 states and 1565 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:11,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:11,439 INFO L93 Difference]: Finished difference Result 698 states and 1814 transitions. [2021-08-21 11:59:11,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 11:59:11,440 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 11:59:11,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:11,442 INFO L225 Difference]: With dead ends: 698 [2021-08-21 11:59:11,442 INFO L226 Difference]: Without dead ends: 691 [2021-08-21 11:59:11,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 183.3ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:59:11,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-08-21 11:59:11,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 542. [2021-08-21 11:59:11,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.8927911275415896) internal successors, (1565), 541 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:11,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1565 transitions. [2021-08-21 11:59:11,452 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1565 transitions. Word has length 19 [2021-08-21 11:59:11,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:11,452 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1565 transitions. [2021-08-21 11:59:11,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:11,453 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1565 transitions. [2021-08-21 11:59:11,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:59:11,454 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:11,454 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:11,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:11,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:11,669 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:11,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:11,669 INFO L82 PathProgramCache]: Analyzing trace with hash 651018475, now seen corresponding path program 83 times [2021-08-21 11:59:11,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:11,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569820880] [2021-08-21 11:59:11,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:11,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:11,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:11,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569820880] [2021-08-21 11:59:11,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569820880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:11,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819320880] [2021-08-21 11:59:11,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:59:11,804 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:11,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:11,805 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 11:59:11,806 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 11:59:12,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 11:59:12,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:12,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 11:59:12,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:12,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819320880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:12,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:12,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-08-21 11:59:12,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622029199] [2021-08-21 11:59:12,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 11:59:12,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:12,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 11:59:12,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:12,888 INFO L87 Difference]: Start difference. First operand 542 states and 1565 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:13,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:13,106 INFO L93 Difference]: Finished difference Result 664 states and 1755 transitions. [2021-08-21 11:59:13,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 11:59:13,106 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 11:59:13,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:13,107 INFO L225 Difference]: With dead ends: 664 [2021-08-21 11:59:13,108 INFO L226 Difference]: Without dead ends: 657 [2021-08-21 11:59:13,108 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 208.8ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:59:13,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-08-21 11:59:13,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 542. [2021-08-21 11:59:13,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.8927911275415896) internal successors, (1565), 541 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:13,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1565 transitions. [2021-08-21 11:59:13,115 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1565 transitions. Word has length 19 [2021-08-21 11:59:13,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:13,115 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1565 transitions. [2021-08-21 11:59:13,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:13,115 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1565 transitions. [2021-08-21 11:59:13,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:59:13,115 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:13,115 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:13,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:13,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:13,316 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:13,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:13,316 INFO L82 PathProgramCache]: Analyzing trace with hash -2144423449, now seen corresponding path program 84 times [2021-08-21 11:59:13,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:13,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986418541] [2021-08-21 11:59:13,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:13,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:13,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:13,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:13,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986418541] [2021-08-21 11:59:13,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986418541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:13,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662045954] [2021-08-21 11:59:13,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:59:13,448 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:13,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:13,450 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 11:59:13,451 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 11:59:14,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:59:14,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:14,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 11:59:14,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:14,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:14,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662045954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:14,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:14,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-08-21 11:59:14,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480515377] [2021-08-21 11:59:14,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:59:14,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:14,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:59:14,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:59:14,556 INFO L87 Difference]: Start difference. First operand 542 states and 1565 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 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 11:59:14,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:14,694 INFO L93 Difference]: Finished difference Result 660 states and 1787 transitions. [2021-08-21 11:59:14,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:59:14,694 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 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 19 [2021-08-21 11:59:14,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:14,695 INFO L225 Difference]: With dead ends: 660 [2021-08-21 11:59:14,695 INFO L226 Difference]: Without dead ends: 653 [2021-08-21 11:59:14,695 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-21 11:59:14,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-08-21 11:59:14,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 555. [2021-08-21 11:59:14,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.9097472924187726) internal successors, (1612), 554 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:14,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1612 transitions. [2021-08-21 11:59:14,703 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1612 transitions. Word has length 19 [2021-08-21 11:59:14,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:14,703 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 1612 transitions. [2021-08-21 11:59:14,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 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 11:59:14,703 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1612 transitions. [2021-08-21 11:59:14,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:59:14,704 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:14,704 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:14,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-21 11:59:14,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:14,905 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:14,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:14,905 INFO L82 PathProgramCache]: Analyzing trace with hash -529720725, now seen corresponding path program 85 times [2021-08-21 11:59:14,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:14,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010415906] [2021-08-21 11:59:14,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:14,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:15,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:15,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:15,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010415906] [2021-08-21 11:59:15,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010415906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:15,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50677595] [2021-08-21 11:59:15,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:59:15,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:15,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:15,032 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 11:59:15,055 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 11:59:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:15,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 11:59:15,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:16,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:16,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50677595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:16,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:16,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-08-21 11:59:16,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310626954] [2021-08-21 11:59:16,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:59:16,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:16,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:59:16,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:59:16,160 INFO L87 Difference]: Start difference. First operand 555 states and 1612 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:16,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:16,309 INFO L93 Difference]: Finished difference Result 661 states and 1784 transitions. [2021-08-21 11:59:16,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:59:16,309 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 11:59:16,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:16,311 INFO L225 Difference]: With dead ends: 661 [2021-08-21 11:59:16,311 INFO L226 Difference]: Without dead ends: 652 [2021-08-21 11:59:16,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 163.6ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:59:16,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-08-21 11:59:16,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 555. [2021-08-21 11:59:16,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.904332129963899) internal successors, (1609), 554 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:16,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1609 transitions. [2021-08-21 11:59:16,321 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1609 transitions. Word has length 19 [2021-08-21 11:59:16,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:16,321 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 1609 transitions. [2021-08-21 11:59:16,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:16,321 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1609 transitions. [2021-08-21 11:59:16,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:59:16,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:16,322 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:16,348 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 11:59:16,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-08-21 11:59:16,537 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:16,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:16,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1685952743, now seen corresponding path program 86 times [2021-08-21 11:59:16,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:16,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170462407] [2021-08-21 11:59:16,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:16,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:16,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:16,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170462407] [2021-08-21 11:59:16,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170462407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:16,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923323979] [2021-08-21 11:59:16,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:59:16,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:16,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:16,648 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 11:59:16,649 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 11:59:17,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:59:17,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:17,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 11:59:17,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:17,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923323979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:17,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:17,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-08-21 11:59:17,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329204628] [2021-08-21 11:59:17,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 11:59:17,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:17,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 11:59:17,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:17,768 INFO L87 Difference]: Start difference. First operand 555 states and 1609 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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 11:59:17,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:17,918 INFO L93 Difference]: Finished difference Result 635 states and 1737 transitions. [2021-08-21 11:59:17,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:59:17,918 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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 19 [2021-08-21 11:59:17,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:17,919 INFO L225 Difference]: With dead ends: 635 [2021-08-21 11:59:17,919 INFO L226 Difference]: Without dead ends: 628 [2021-08-21 11:59:17,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 175.4ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-21 11:59:17,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-08-21 11:59:17,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 555. [2021-08-21 11:59:17,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.904332129963899) internal successors, (1609), 554 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:17,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1609 transitions. [2021-08-21 11:59:17,927 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1609 transitions. Word has length 19 [2021-08-21 11:59:17,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:17,927 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 1609 transitions. [2021-08-21 11:59:17,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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 11:59:17,927 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1609 transitions. [2021-08-21 11:59:17,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:59:17,928 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:17,928 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:17,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-21 11:59:18,132 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,SelfDestructingSolverStorable99 [2021-08-21 11:59:18,133 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:18,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:18,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1338674603, now seen corresponding path program 87 times [2021-08-21 11:59:18,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:18,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812082976] [2021-08-21 11:59:18,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:18,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:18,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:18,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:18,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:18,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812082976] [2021-08-21 11:59:18,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812082976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:18,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016180916] [2021-08-21 11:59:18,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:59:18,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:18,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:18,268 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 11:59:18,270 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 11:59:19,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:59:19,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:19,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 11:59:19,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:19,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:19,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016180916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:19,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:19,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-21 11:59:19,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113260030] [2021-08-21 11:59:19,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 11:59:19,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:19,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 11:59:19,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:19,450 INFO L87 Difference]: Start difference. First operand 555 states and 1609 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:19,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:19,620 INFO L93 Difference]: Finished difference Result 776 states and 2043 transitions. [2021-08-21 11:59:19,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 11:59:19,621 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 11:59:19,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:19,622 INFO L225 Difference]: With dead ends: 776 [2021-08-21 11:59:19,622 INFO L226 Difference]: Without dead ends: 759 [2021-08-21 11:59:19,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 191.8ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:59:19,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-08-21 11:59:19,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 594. [2021-08-21 11:59:19,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 2.9409780775716694) internal successors, (1744), 593 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:19,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1744 transitions. [2021-08-21 11:59:19,631 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1744 transitions. Word has length 19 [2021-08-21 11:59:19,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:19,631 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 1744 transitions. [2021-08-21 11:59:19,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:19,631 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1744 transitions. [2021-08-21 11:59:19,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:59:19,632 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:19,632 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:19,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-21 11:59:19,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-21 11:59:19,833 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:19,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:19,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1341589969, now seen corresponding path program 88 times [2021-08-21 11:59:19,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:19,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298136159] [2021-08-21 11:59:19,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:19,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:19,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:19,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298136159] [2021-08-21 11:59:19,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298136159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:19,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692063584] [2021-08-21 11:59:19,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:59:19,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:19,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:19,946 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 11:59:19,947 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 11:59:20,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:59:20,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:20,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 11:59:20,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:21,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:21,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692063584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:21,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:21,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-08-21 11:59:21,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414405774] [2021-08-21 11:59:21,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:59:21,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:21,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:59:21,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:59:21,117 INFO L87 Difference]: Start difference. First operand 594 states and 1744 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 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 11:59:21,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:21,284 INFO L93 Difference]: Finished difference Result 774 states and 2026 transitions. [2021-08-21 11:59:21,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 11:59:21,284 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 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 19 [2021-08-21 11:59:21,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:21,286 INFO L225 Difference]: With dead ends: 774 [2021-08-21 11:59:21,286 INFO L226 Difference]: Without dead ends: 756 [2021-08-21 11:59:21,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 176.3ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:59:21,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-08-21 11:59:21,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 583. [2021-08-21 11:59:21,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.922680412371134) internal successors, (1701), 582 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:21,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1701 transitions. [2021-08-21 11:59:21,297 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1701 transitions. Word has length 19 [2021-08-21 11:59:21,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:21,297 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 1701 transitions. [2021-08-21 11:59:21,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 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 11:59:21,297 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1701 transitions. [2021-08-21 11:59:21,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:59:21,298 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:21,298 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:21,328 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 11:59:21,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-21 11:59:21,519 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:21,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:21,520 INFO L82 PathProgramCache]: Analyzing trace with hash 874083499, now seen corresponding path program 89 times [2021-08-21 11:59:21,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:21,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179924886] [2021-08-21 11:59:21,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:21,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:21,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:21,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179924886] [2021-08-21 11:59:21,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179924886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:21,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144518060] [2021-08-21 11:59:21,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:59:21,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:21,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:21,633 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 11:59:21,634 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 11:59:22,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:59:22,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:22,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 11:59:22,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:22,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144518060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:22,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:22,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-21 11:59:22,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970420361] [2021-08-21 11:59:22,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 11:59:22,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:22,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 11:59:22,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:22,794 INFO L87 Difference]: Start difference. First operand 583 states and 1701 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:23,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:23,047 INFO L93 Difference]: Finished difference Result 744 states and 1952 transitions. [2021-08-21 11:59:23,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 11:59:23,047 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 11:59:23,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:23,048 INFO L225 Difference]: With dead ends: 744 [2021-08-21 11:59:23,049 INFO L226 Difference]: Without dead ends: 722 [2021-08-21 11:59:23,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 194.9ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:59:23,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-08-21 11:59:23,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 580. [2021-08-21 11:59:23,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 2.9153713298791017) internal successors, (1688), 579 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:23,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1688 transitions. [2021-08-21 11:59:23,059 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1688 transitions. Word has length 19 [2021-08-21 11:59:23,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:23,059 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 1688 transitions. [2021-08-21 11:59:23,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:23,060 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1688 transitions. [2021-08-21 11:59:23,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:59:23,060 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:23,061 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:23,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:23,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:23,273 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:23,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:23,274 INFO L82 PathProgramCache]: Analyzing trace with hash 840484271, now seen corresponding path program 90 times [2021-08-21 11:59:23,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:23,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28604142] [2021-08-21 11:59:23,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:23,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:23,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:23,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:23,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28604142] [2021-08-21 11:59:23,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28604142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:23,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389491693] [2021-08-21 11:59:23,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:59:23,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:23,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:23,407 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 11:59:23,407 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 11:59:24,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:59:24,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:24,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 11:59:24,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:24,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389491693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:24,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:24,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-21 11:59:24,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037017551] [2021-08-21 11:59:24,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 11:59:24,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:24,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 11:59:24,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:24,603 INFO L87 Difference]: Start difference. First operand 580 states and 1688 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:24,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:24,781 INFO L93 Difference]: Finished difference Result 695 states and 1864 transitions. [2021-08-21 11:59:24,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 11:59:24,781 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 11:59:24,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:24,782 INFO L225 Difference]: With dead ends: 695 [2021-08-21 11:59:24,782 INFO L226 Difference]: Without dead ends: 688 [2021-08-21 11:59:24,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 185.5ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:59:24,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-08-21 11:59:24,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 582. [2021-08-21 11:59:24,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 2.910499139414802) internal successors, (1691), 581 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:24,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1691 transitions. [2021-08-21 11:59:24,790 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1691 transitions. Word has length 19 [2021-08-21 11:59:24,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:24,790 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 1691 transitions. [2021-08-21 11:59:24,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:24,791 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1691 transitions. [2021-08-21 11:59:24,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:59:24,791 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:24,792 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:24,820 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 11:59:25,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-21 11:59:25,017 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:25,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:25,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1868116993, now seen corresponding path program 91 times [2021-08-21 11:59:25,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:25,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414219407] [2021-08-21 11:59:25,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:25,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:25,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:25,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:25,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414219407] [2021-08-21 11:59:25,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414219407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:25,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262272258] [2021-08-21 11:59:25,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:59:25,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:25,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:25,157 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 11:59:25,182 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 11:59:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:26,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 11:59:26,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:26,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262272258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:26,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:26,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-08-21 11:59:26,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694975885] [2021-08-21 11:59:26,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 11:59:26,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:26,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 11:59:26,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:26,410 INFO L87 Difference]: Start difference. First operand 582 states and 1691 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:26,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:26,533 INFO L93 Difference]: Finished difference Result 647 states and 1795 transitions. [2021-08-21 11:59:26,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:59:26,534 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 11:59:26,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:26,536 INFO L225 Difference]: With dead ends: 647 [2021-08-21 11:59:26,536 INFO L226 Difference]: Without dead ends: 634 [2021-08-21 11:59:26,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 170.3ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-21 11:59:26,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-08-21 11:59:26,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 577. [2021-08-21 11:59:26,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 2.907986111111111) internal successors, (1675), 576 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:26,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1675 transitions. [2021-08-21 11:59:26,546 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1675 transitions. Word has length 19 [2021-08-21 11:59:26,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:26,546 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 1675 transitions. [2021-08-21 11:59:26,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:26,546 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1675 transitions. [2021-08-21 11:59:26,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:59:26,562 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:26,562 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:26,592 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 11:59:26,788 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,SelfDestructingSolverStorable104 [2021-08-21 11:59:26,789 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:26,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:26,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1940531815, now seen corresponding path program 92 times [2021-08-21 11:59:26,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:26,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129229687] [2021-08-21 11:59:26,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:26,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:26,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:26,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129229687] [2021-08-21 11:59:26,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129229687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:26,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18995438] [2021-08-21 11:59:26,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:59:26,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:26,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:26,902 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 11:59:26,902 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 11:59:27,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:59:27,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:27,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 11:59:27,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:28,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18995438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:28,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:28,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-08-21 11:59:28,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819056913] [2021-08-21 11:59:28,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 11:59:28,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:28,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 11:59:28,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:28,122 INFO L87 Difference]: Start difference. First operand 577 states and 1675 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:28,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:28,303 INFO L93 Difference]: Finished difference Result 798 states and 2119 transitions. [2021-08-21 11:59:28,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 11:59:28,304 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 11:59:28,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:28,306 INFO L225 Difference]: With dead ends: 798 [2021-08-21 11:59:28,306 INFO L226 Difference]: Without dead ends: 781 [2021-08-21 11:59:28,306 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:59:28,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-08-21 11:59:28,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 632. [2021-08-21 11:59:28,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 2.9334389857369256) internal successors, (1851), 631 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:28,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 1851 transitions. [2021-08-21 11:59:28,317 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 1851 transitions. Word has length 19 [2021-08-21 11:59:28,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:28,317 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 1851 transitions. [2021-08-21 11:59:28,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:28,317 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 1851 transitions. [2021-08-21 11:59:28,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:59:28,318 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:28,318 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:28,352 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 11:59:28,544 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,SelfDestructingSolverStorable105 [2021-08-21 11:59:28,544 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:28,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:28,545 INFO L82 PathProgramCache]: Analyzing trace with hash -739732757, now seen corresponding path program 93 times [2021-08-21 11:59:28,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:28,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994449327] [2021-08-21 11:59:28,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:28,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:28,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:28,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:28,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994449327] [2021-08-21 11:59:28,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994449327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:28,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684262008] [2021-08-21 11:59:28,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:59:28,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:28,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:28,668 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 11:59:28,695 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 11:59:29,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:59:29,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:29,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 11:59:29,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:29,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:29,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684262008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:29,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:29,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-21 11:59:29,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483100177] [2021-08-21 11:59:29,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:59:29,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:29,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:59:29,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:59:29,943 INFO L87 Difference]: Start difference. First operand 632 states and 1851 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:30,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:30,143 INFO L93 Difference]: Finished difference Result 796 states and 2104 transitions. [2021-08-21 11:59:30,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 11:59:30,143 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 11:59:30,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:30,144 INFO L225 Difference]: With dead ends: 796 [2021-08-21 11:59:30,144 INFO L226 Difference]: Without dead ends: 780 [2021-08-21 11:59:30,145 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 179.6ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:59:30,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-08-21 11:59:30,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 621. [2021-08-21 11:59:30,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 2.92258064516129) internal successors, (1812), 620 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:30,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1812 transitions. [2021-08-21 11:59:30,152 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1812 transitions. Word has length 19 [2021-08-21 11:59:30,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:30,152 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 1812 transitions. [2021-08-21 11:59:30,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:30,153 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1812 transitions. [2021-08-21 11:59:30,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:59:30,154 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:30,154 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:30,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-21 11:59:30,370 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,SelfDestructingSolverStorable106 [2021-08-21 11:59:30,370 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:30,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:30,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1475940711, now seen corresponding path program 94 times [2021-08-21 11:59:30,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:30,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692192653] [2021-08-21 11:59:30,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:30,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:30,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:30,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:30,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692192653] [2021-08-21 11:59:30,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692192653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:30,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946210292] [2021-08-21 11:59:30,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:59:30,522 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:30,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:30,523 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 11:59:30,523 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 11:59:31,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:59:31,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:31,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 11:59:31,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:31,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946210292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:31,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:31,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-08-21 11:59:31,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653839006] [2021-08-21 11:59:31,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 11:59:31,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:31,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 11:59:31,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:31,813 INFO L87 Difference]: Start difference. First operand 621 states and 1812 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 11:59:32,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:32,007 INFO L93 Difference]: Finished difference Result 809 states and 2103 transitions. [2021-08-21 11:59:32,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 11:59:32,007 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 19 [2021-08-21 11:59:32,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:32,008 INFO L225 Difference]: With dead ends: 809 [2021-08-21 11:59:32,008 INFO L226 Difference]: Without dead ends: 791 [2021-08-21 11:59:32,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 192.1ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:59:32,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-08-21 11:59:32,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 614. [2021-08-21 11:59:32,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 2.911908646003263) internal successors, (1785), 613 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:32,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1785 transitions. [2021-08-21 11:59:32,017 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1785 transitions. Word has length 19 [2021-08-21 11:59:32,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:32,017 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 1785 transitions. [2021-08-21 11:59:32,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 11:59:32,017 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1785 transitions. [2021-08-21 11:59:32,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:59:32,018 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:32,018 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:32,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-21 11:59:32,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:32,218 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:32,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:32,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1442341483, now seen corresponding path program 95 times [2021-08-21 11:59:32,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:32,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742819534] [2021-08-21 11:59:32,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:32,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:32,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:32,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:32,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:32,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742819534] [2021-08-21 11:59:32,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742819534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:32,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804477248] [2021-08-21 11:59:32,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:59:32,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:32,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:32,334 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 11:59:32,334 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 11:59:33,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 11:59:33,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:33,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 11:59:33,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:33,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:33,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804477248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:33,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:33,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-08-21 11:59:33,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482872458] [2021-08-21 11:59:33,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 11:59:33,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:33,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 11:59:33,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:33,671 INFO L87 Difference]: Start difference. First operand 614 states and 1785 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 11:59:33,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:33,925 INFO L93 Difference]: Finished difference Result 764 states and 2018 transitions. [2021-08-21 11:59:33,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 11:59:33,925 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 19 [2021-08-21 11:59:33,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:33,926 INFO L225 Difference]: With dead ends: 764 [2021-08-21 11:59:33,926 INFO L226 Difference]: Without dead ends: 744 [2021-08-21 11:59:33,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 202.3ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-08-21 11:59:33,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-08-21 11:59:33,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 607. [2021-08-21 11:59:33,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 2.9141914191419143) internal successors, (1766), 606 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:33,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1766 transitions. [2021-08-21 11:59:33,934 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1766 transitions. Word has length 19 [2021-08-21 11:59:33,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:33,934 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 1766 transitions. [2021-08-21 11:59:33,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 11:59:33,934 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1766 transitions. [2021-08-21 11:59:33,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:59:33,935 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:33,935 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:33,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:34,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:34,136 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:34,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:34,136 INFO L82 PathProgramCache]: Analyzing trace with hash 400765415, now seen corresponding path program 96 times [2021-08-21 11:59:34,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:34,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041436029] [2021-08-21 11:59:34,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:34,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:34,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:34,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:34,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:34,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041436029] [2021-08-21 11:59:34,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041436029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:34,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128382883] [2021-08-21 11:59:34,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:59:34,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:34,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:34,281 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 11:59:34,282 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 11:59:35,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 11:59:35,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:35,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 11:59:35,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:35,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128382883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:35,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:35,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-08-21 11:59:35,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772839209] [2021-08-21 11:59:35,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 11:59:35,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:35,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 11:59:35,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:35,702 INFO L87 Difference]: Start difference. First operand 607 states and 1766 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 11:59:35,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:35,932 INFO L93 Difference]: Finished difference Result 713 states and 1927 transitions. [2021-08-21 11:59:35,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 11:59:35,932 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 19 [2021-08-21 11:59:35,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:35,933 INFO L225 Difference]: With dead ends: 713 [2021-08-21 11:59:35,933 INFO L226 Difference]: Without dead ends: 706 [2021-08-21 11:59:35,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 197.0ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:59:35,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-08-21 11:59:35,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 615. [2021-08-21 11:59:35,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 2.8957654723127035) internal successors, (1778), 614 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:35,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 1778 transitions. [2021-08-21 11:59:35,940 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 1778 transitions. Word has length 19 [2021-08-21 11:59:35,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:35,940 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 1778 transitions. [2021-08-21 11:59:35,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 11:59:35,940 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 1778 transitions. [2021-08-21 11:59:35,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:59:35,941 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:35,941 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:35,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-21 11:59:36,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:36,142 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:36,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:36,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1510649617, now seen corresponding path program 97 times [2021-08-21 11:59:36,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:36,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51652746] [2021-08-21 11:59:36,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:36,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:36,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:36,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51652746] [2021-08-21 11:59:36,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51652746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:36,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560190513] [2021-08-21 11:59:36,270 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:59:36,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:36,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:36,273 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 11:59:36,297 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 11:59:37,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:37,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 11:59:37,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:37,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560190513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:37,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:37,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-08-21 11:59:37,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036090589] [2021-08-21 11:59:37,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 11:59:37,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:37,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 11:59:37,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:37,645 INFO L87 Difference]: Start difference. First operand 615 states and 1778 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:37,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:37,785 INFO L93 Difference]: Finished difference Result 753 states and 2034 transitions. [2021-08-21 11:59:37,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:59:37,785 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 11:59:37,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:37,786 INFO L225 Difference]: With dead ends: 753 [2021-08-21 11:59:37,786 INFO L226 Difference]: Without dead ends: 743 [2021-08-21 11:59:37,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 166.3ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-21 11:59:37,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-08-21 11:59:37,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 627. [2021-08-21 11:59:37,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 2.905750798722045) internal successors, (1819), 626 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:37,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1819 transitions. [2021-08-21 11:59:37,794 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1819 transitions. Word has length 19 [2021-08-21 11:59:37,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:37,794 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 1819 transitions. [2021-08-21 11:59:37,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:37,794 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1819 transitions. [2021-08-21 11:59:37,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:59:37,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:37,795 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:37,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-21 11:59:37,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:37,995 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:37,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:37,995 INFO L82 PathProgramCache]: Analyzing trace with hash 104053107, now seen corresponding path program 98 times [2021-08-21 11:59:37,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:37,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863029897] [2021-08-21 11:59:37,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:37,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:38,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:38,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863029897] [2021-08-21 11:59:38,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863029897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:38,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890237532] [2021-08-21 11:59:38,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:59:38,106 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:38,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:38,107 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 11:59:38,107 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 11:59:39,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:59:39,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:39,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 11:59:39,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:39,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890237532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:39,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:39,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-08-21 11:59:39,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597421319] [2021-08-21 11:59:39,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:59:39,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:39,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:59:39,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:59:39,460 INFO L87 Difference]: Start difference. First operand 627 states and 1819 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 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 11:59:39,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:39,603 INFO L93 Difference]: Finished difference Result 735 states and 2000 transitions. [2021-08-21 11:59:39,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:59:39,603 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 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 19 [2021-08-21 11:59:39,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:39,616 INFO L225 Difference]: With dead ends: 735 [2021-08-21 11:59:39,616 INFO L226 Difference]: Without dead ends: 728 [2021-08-21 11:59:39,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 158.4ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-21 11:59:39,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-08-21 11:59:39,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 625. [2021-08-21 11:59:39,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.90224358974359) internal successors, (1811), 624 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:39,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1811 transitions. [2021-08-21 11:59:39,626 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1811 transitions. Word has length 19 [2021-08-21 11:59:39,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:39,626 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1811 transitions. [2021-08-21 11:59:39,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 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 11:59:39,626 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1811 transitions. [2021-08-21 11:59:39,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:59:39,627 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:39,627 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:39,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-21 11:59:39,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-21 11:59:39,841 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:39,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:39,841 INFO L82 PathProgramCache]: Analyzing trace with hash -939194811, now seen corresponding path program 99 times [2021-08-21 11:59:39,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:39,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492773526] [2021-08-21 11:59:39,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:39,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:39,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:39,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492773526] [2021-08-21 11:59:39,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492773526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:39,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250501450] [2021-08-21 11:59:39,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:59:39,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:39,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:39,964 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 11:59:39,991 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 11:59:41,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 11:59:41,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:41,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 11:59:41,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:41,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250501450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:41,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:41,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-08-21 11:59:41,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526912342] [2021-08-21 11:59:41,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 11:59:41,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:41,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 11:59:41,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:41,411 INFO L87 Difference]: Start difference. First operand 625 states and 1811 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:41,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:41,542 INFO L93 Difference]: Finished difference Result 709 states and 1948 transitions. [2021-08-21 11:59:41,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:59:41,542 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 11:59:41,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:41,543 INFO L225 Difference]: With dead ends: 709 [2021-08-21 11:59:41,543 INFO L226 Difference]: Without dead ends: 702 [2021-08-21 11:59:41,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-21 11:59:41,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-08-21 11:59:41,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 624. [2021-08-21 11:59:41,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 2.9020866773675764) internal successors, (1808), 623 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:41,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1808 transitions. [2021-08-21 11:59:41,551 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1808 transitions. Word has length 19 [2021-08-21 11:59:41,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:41,551 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 1808 transitions. [2021-08-21 11:59:41,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:41,551 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1808 transitions. [2021-08-21 11:59:41,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:59:41,552 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:41,552 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:41,571 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 11:59:41,752 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,SelfDestructingSolverStorable112 [2021-08-21 11:59:41,752 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:41,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:41,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1123091609, now seen corresponding path program 100 times [2021-08-21 11:59:41,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:41,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201110735] [2021-08-21 11:59:41,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:41,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:41,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:41,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201110735] [2021-08-21 11:59:41,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201110735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:41,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905449084] [2021-08-21 11:59:41,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:59:41,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:41,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:41,868 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 11:59:41,869 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 11:59:43,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:59:43,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:43,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 11:59:43,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:43,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905449084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:43,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:43,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-21 11:59:43,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457217799] [2021-08-21 11:59:43,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 11:59:43,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:43,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 11:59:43,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:43,272 INFO L87 Difference]: Start difference. First operand 624 states and 1808 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 11:59:43,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:43,460 INFO L93 Difference]: Finished difference Result 809 states and 2160 transitions. [2021-08-21 11:59:43,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:59:43,460 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 19 [2021-08-21 11:59:43,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:43,462 INFO L225 Difference]: With dead ends: 809 [2021-08-21 11:59:43,462 INFO L226 Difference]: Without dead ends: 799 [2021-08-21 11:59:43,462 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 156.5ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-21 11:59:43,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-08-21 11:59:43,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 644. [2021-08-21 11:59:43,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 2.9175738724727838) internal successors, (1876), 643 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:43,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1876 transitions. [2021-08-21 11:59:43,474 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1876 transitions. Word has length 19 [2021-08-21 11:59:43,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:43,474 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 1876 transitions. [2021-08-21 11:59:43,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 11:59:43,475 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1876 transitions. [2021-08-21 11:59:43,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:59:43,476 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:43,476 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:43,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-21 11:59:43,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-21 11:59:43,698 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:43,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:43,699 INFO L82 PathProgramCache]: Analyzing trace with hash 491611115, now seen corresponding path program 101 times [2021-08-21 11:59:43,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:43,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544808097] [2021-08-21 11:59:43,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:43,699 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:43,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:43,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:43,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544808097] [2021-08-21 11:59:43,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544808097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:43,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5339778] [2021-08-21 11:59:43,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:59:43,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:43,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:43,822 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 11:59:43,822 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 11:59:45,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 11:59:45,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:45,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 11:59:45,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:45,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5339778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:45,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:45,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-08-21 11:59:45,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897449738] [2021-08-21 11:59:45,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:59:45,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:45,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:59:45,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:59:45,234 INFO L87 Difference]: Start difference. First operand 644 states and 1876 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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 11:59:45,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:45,398 INFO L93 Difference]: Finished difference Result 793 states and 2130 transitions. [2021-08-21 11:59:45,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:59:45,398 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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 19 [2021-08-21 11:59:45,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:45,399 INFO L225 Difference]: With dead ends: 793 [2021-08-21 11:59:45,399 INFO L226 Difference]: Without dead ends: 786 [2021-08-21 11:59:45,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 162.3ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:59:45,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-08-21 11:59:45,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 640. [2021-08-21 11:59:45,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 2.9139280125195617) internal successors, (1862), 639 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:45,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1862 transitions. [2021-08-21 11:59:45,407 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1862 transitions. Word has length 19 [2021-08-21 11:59:45,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:45,407 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1862 transitions. [2021-08-21 11:59:45,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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 11:59:45,407 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1862 transitions. [2021-08-21 11:59:45,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:59:45,408 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:45,408 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:45,431 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 11:59:45,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-21 11:59:45,614 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:45,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:45,614 INFO L82 PathProgramCache]: Analyzing trace with hash -551636803, now seen corresponding path program 102 times [2021-08-21 11:59:45,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:45,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236371003] [2021-08-21 11:59:45,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:45,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:45,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:45,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236371003] [2021-08-21 11:59:45,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236371003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:45,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404515655] [2021-08-21 11:59:45,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:59:45,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:45,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:45,720 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 11:59:45,721 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 11:59:46,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:59:46,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:46,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 11:59:46,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:47,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:47,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404515655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:47,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:47,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-21 11:59:47,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283952331] [2021-08-21 11:59:47,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 11:59:47,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:47,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 11:59:47,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:47,141 INFO L87 Difference]: Start difference. First operand 640 states and 1862 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 11:59:47,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:47,306 INFO L93 Difference]: Finished difference Result 788 states and 2114 transitions. [2021-08-21 11:59:47,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 11:59:47,307 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 19 [2021-08-21 11:59:47,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:47,308 INFO L225 Difference]: With dead ends: 788 [2021-08-21 11:59:47,308 INFO L226 Difference]: Without dead ends: 775 [2021-08-21 11:59:47,308 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 166.7ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:59:47,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-08-21 11:59:47,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 638. [2021-08-21 11:59:47,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.9089481946624804) internal successors, (1853), 637 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:47,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1853 transitions. [2021-08-21 11:59:47,319 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1853 transitions. Word has length 19 [2021-08-21 11:59:47,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:47,319 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1853 transitions. [2021-08-21 11:59:47,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 11:59:47,319 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1853 transitions. [2021-08-21 11:59:47,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:59:47,320 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:47,320 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:47,348 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 11:59:47,540 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,SelfDestructingSolverStorable115 [2021-08-21 11:59:47,541 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:47,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:47,541 INFO L82 PathProgramCache]: Analyzing trace with hash -16407001, now seen corresponding path program 103 times [2021-08-21 11:59:47,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:47,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667047994] [2021-08-21 11:59:47,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:47,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:47,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:47,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667047994] [2021-08-21 11:59:47,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667047994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:47,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838303559] [2021-08-21 11:59:47,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:59:47,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:47,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:47,657 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 11:59:47,657 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 11:59:48,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:48,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 11:59:48,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:49,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838303559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:49,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:49,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-21 11:59:49,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696050388] [2021-08-21 11:59:49,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 11:59:49,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:49,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 11:59:49,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:49,117 INFO L87 Difference]: Start difference. First operand 638 states and 1853 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 11:59:49,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:49,284 INFO L93 Difference]: Finished difference Result 748 states and 2031 transitions. [2021-08-21 11:59:49,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 11:59:49,285 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 19 [2021-08-21 11:59:49,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:49,286 INFO L225 Difference]: With dead ends: 748 [2021-08-21 11:59:49,286 INFO L226 Difference]: Without dead ends: 741 [2021-08-21 11:59:49,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 171.1ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:59:49,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-08-21 11:59:49,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 636. [2021-08-21 11:59:49,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 2.9086614173228345) internal successors, (1847), 635 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:49,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1847 transitions. [2021-08-21 11:59:49,297 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1847 transitions. Word has length 19 [2021-08-21 11:59:49,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:49,297 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1847 transitions. [2021-08-21 11:59:49,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 11:59:49,297 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1847 transitions. [2021-08-21 11:59:49,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 11:59:49,298 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:49,298 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:49,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-21 11:59:49,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-08-21 11:59:49,513 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:49,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:49,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1231124503, now seen corresponding path program 104 times [2021-08-21 11:59:49,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:49,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270306646] [2021-08-21 11:59:49,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:49,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:49,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:49,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270306646] [2021-08-21 11:59:49,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270306646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:49,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279061615] [2021-08-21 11:59:49,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:59:49,587 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:49,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:49,588 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 11:59:49,589 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 11:59:50,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:59:50,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:50,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 11:59:50,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:50,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:50,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279061615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:50,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:50,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 11:59:50,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469730235] [2021-08-21 11:59:50,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:59:50,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:50,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:59:50,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:59:50,931 INFO L87 Difference]: Start difference. First operand 636 states and 1847 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:51,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:51,029 INFO L93 Difference]: Finished difference Result 972 states and 2745 transitions. [2021-08-21 11:59:51,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 11:59:51,029 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 11:59:51,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:51,030 INFO L225 Difference]: With dead ends: 972 [2021-08-21 11:59:51,030 INFO L226 Difference]: Without dead ends: 955 [2021-08-21 11:59:51,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-08-21 11:59:51,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-08-21 11:59:51,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 631. [2021-08-21 11:59:51,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 2.9158730158730157) internal successors, (1837), 630 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:51,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1837 transitions. [2021-08-21 11:59:51,040 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1837 transitions. Word has length 20 [2021-08-21 11:59:51,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:51,040 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 1837 transitions. [2021-08-21 11:59:51,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:51,040 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1837 transitions. [2021-08-21 11:59:51,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 11:59:51,041 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:51,041 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:51,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-21 11:59:51,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:51,242 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:51,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:51,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1715049991, now seen corresponding path program 105 times [2021-08-21 11:59:51,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:51,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714891330] [2021-08-21 11:59:51,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:51,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:51,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:51,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714891330] [2021-08-21 11:59:51,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714891330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:51,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028387521] [2021-08-21 11:59:51,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:59:51,313 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:51,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:51,314 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 11:59:51,315 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 11:59:52,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:59:52,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:52,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 11:59:52,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:52,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028387521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:52,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:52,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 11:59:52,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569189813] [2021-08-21 11:59:52,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:59:52,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:52,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:59:52,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:59:52,785 INFO L87 Difference]: Start difference. First operand 631 states and 1837 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:52,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:52,885 INFO L93 Difference]: Finished difference Result 996 states and 2821 transitions. [2021-08-21 11:59:52,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:59:52,885 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 11:59:52,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:52,887 INFO L225 Difference]: With dead ends: 996 [2021-08-21 11:59:52,887 INFO L226 Difference]: Without dead ends: 996 [2021-08-21 11:59:52,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-08-21 11:59:52,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-08-21 11:59:52,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 650. [2021-08-21 11:59:52,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.9183359013867487) internal successors, (1894), 649 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:52,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1894 transitions. [2021-08-21 11:59:52,895 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1894 transitions. Word has length 20 [2021-08-21 11:59:52,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:52,895 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 1894 transitions. [2021-08-21 11:59:52,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:52,895 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1894 transitions. [2021-08-21 11:59:52,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 11:59:52,896 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:52,896 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:52,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-21 11:59:53,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:53,098 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:53,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:53,098 INFO L82 PathProgramCache]: Analyzing trace with hash -77943029, now seen corresponding path program 106 times [2021-08-21 11:59:53,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:53,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429627281] [2021-08-21 11:59:53,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:53,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:53,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:53,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:53,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429627281] [2021-08-21 11:59:53,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429627281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:53,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071790330] [2021-08-21 11:59:53,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:59:53,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:53,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:53,160 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 11:59:53,160 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 11:59:54,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:59:54,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:54,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 11:59:54,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:54,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:54,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071790330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:54,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:54,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 11:59:54,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451387951] [2021-08-21 11:59:54,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 11:59:54,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:54,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 11:59:54,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:59:54,516 INFO L87 Difference]: Start difference. First operand 650 states and 1894 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:54,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:54,834 INFO L93 Difference]: Finished difference Result 1332 states and 3575 transitions. [2021-08-21 11:59:54,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 11:59:54,835 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 11:59:54,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:54,836 INFO L225 Difference]: With dead ends: 1332 [2021-08-21 11:59:54,836 INFO L226 Difference]: Without dead ends: 1326 [2021-08-21 11:59:54,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 259.5ms TimeCoverageRelationStatistics Valid=424, Invalid=836, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 11:59:54,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-08-21 11:59:54,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 787. [2021-08-21 11:59:54,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.0063613231552164) internal successors, (2363), 786 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2363 transitions. [2021-08-21 11:59:54,848 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2363 transitions. Word has length 20 [2021-08-21 11:59:54,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:54,848 INFO L470 AbstractCegarLoop]: Abstraction has 787 states and 2363 transitions. [2021-08-21 11:59:54,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:54,848 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2363 transitions. [2021-08-21 11:59:54,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 11:59:54,849 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:54,849 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:54,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-21 11:59:55,050 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,SelfDestructingSolverStorable119 [2021-08-21 11:59:55,050 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:55,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:55,050 INFO L82 PathProgramCache]: Analyzing trace with hash 493511777, now seen corresponding path program 107 times [2021-08-21 11:59:55,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:55,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194544069] [2021-08-21 11:59:55,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:55,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:55,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:55,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194544069] [2021-08-21 11:59:55,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194544069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:55,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183071686] [2021-08-21 11:59:55,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:59:55,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:55,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:55,128 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 11:59:55,128 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 11:59:56,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 11:59:56,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:56,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 11:59:56,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:56,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:56,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183071686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:56,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:56,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 11:59:56,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663246066] [2021-08-21 11:59:56,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 11:59:56,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:56,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 11:59:56,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:59:56,509 INFO L87 Difference]: Start difference. First operand 787 states and 2363 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:56,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:56,887 INFO L93 Difference]: Finished difference Result 1321 states and 3538 transitions. [2021-08-21 11:59:56,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 11:59:56,887 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 11:59:56,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:56,889 INFO L225 Difference]: With dead ends: 1321 [2021-08-21 11:59:56,889 INFO L226 Difference]: Without dead ends: 1315 [2021-08-21 11:59:56,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 329.6ms TimeCoverageRelationStatistics Valid=487, Invalid=1405, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 11:59:56,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-08-21 11:59:56,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 729. [2021-08-21 11:59:56,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 2.9464285714285716) internal successors, (2145), 728 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:56,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2145 transitions. [2021-08-21 11:59:56,900 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2145 transitions. Word has length 20 [2021-08-21 11:59:56,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:56,900 INFO L470 AbstractCegarLoop]: Abstraction has 729 states and 2145 transitions. [2021-08-21 11:59:56,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:56,900 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2145 transitions. [2021-08-21 11:59:56,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 11:59:56,901 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:56,901 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:56,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-21 11:59:57,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:57,101 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:57,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:57,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1438059769, now seen corresponding path program 108 times [2021-08-21 11:59:57,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:57,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228392212] [2021-08-21 11:59:57,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:57,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:57,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:57,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:57,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228392212] [2021-08-21 11:59:57,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228392212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:57,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735333929] [2021-08-21 11:59:57,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:59:57,157 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:57,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:57,158 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 11:59:57,159 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 11:59:58,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:59:58,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:58,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 11:59:58,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:58,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:58,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735333929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:58,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:58,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 11:59:58,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164261826] [2021-08-21 11:59:58,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 11:59:58,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:58,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 11:59:58,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:59:58,561 INFO L87 Difference]: Start difference. First operand 729 states and 2145 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:58,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:58,937 INFO L93 Difference]: Finished difference Result 1177 states and 3102 transitions. [2021-08-21 11:59:58,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 11:59:58,938 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 11:59:58,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:58,939 INFO L225 Difference]: With dead ends: 1177 [2021-08-21 11:59:58,939 INFO L226 Difference]: Without dead ends: 1177 [2021-08-21 11:59:58,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 296.5ms TimeCoverageRelationStatistics Valid=597, Invalid=1043, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 11:59:58,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-08-21 11:59:58,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 767. [2021-08-21 11:59:58,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 2.971279373368146) internal successors, (2276), 766 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:58,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2276 transitions. [2021-08-21 11:59:58,950 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2276 transitions. Word has length 20 [2021-08-21 11:59:58,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:58,950 INFO L470 AbstractCegarLoop]: Abstraction has 767 states and 2276 transitions. [2021-08-21 11:59:58,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:58,950 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2276 transitions. [2021-08-21 11:59:58,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 11:59:58,951 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:58,951 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:58,972 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 11:59:59,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:59,151 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:59,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:59,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1902650873, now seen corresponding path program 109 times [2021-08-21 11:59:59,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:59,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004951540] [2021-08-21 11:59:59,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:59,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:59,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:59,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004951540] [2021-08-21 11:59:59,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004951540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:59,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112690590] [2021-08-21 11:59:59,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:59:59,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:59,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:59,214 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 11:59:59,233 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 12:00:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:00,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:00,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:00,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112690590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:00,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:00,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:00:00,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193179619] [2021-08-21 12:00:00,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:00:00,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:00,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:00:00,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:00:00,644 INFO L87 Difference]: Start difference. First operand 767 states and 2276 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:01,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:01,025 INFO L93 Difference]: Finished difference Result 1009 states and 2756 transitions. [2021-08-21 12:00:01,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:00:01,026 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:00:01,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:01,027 INFO L225 Difference]: With dead ends: 1009 [2021-08-21 12:00:01,027 INFO L226 Difference]: Without dead ends: 1005 [2021-08-21 12:00:01,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 334.8ms TimeCoverageRelationStatistics Valid=781, Invalid=1475, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 12:00:01,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-08-21 12:00:01,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 699. [2021-08-21 12:00:01,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 2.9283667621776504) internal successors, (2044), 698 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:01,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2044 transitions. [2021-08-21 12:00:01,036 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2044 transitions. Word has length 20 [2021-08-21 12:00:01,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:01,037 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2044 transitions. [2021-08-21 12:00:01,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:01,037 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2044 transitions. [2021-08-21 12:00:01,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:01,037 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:01,037 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:01,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-21 12:00:01,238 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,SelfDestructingSolverStorable122 [2021-08-21 12:00:01,238 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:01,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:01,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1028741579, now seen corresponding path program 110 times [2021-08-21 12:00:01,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:01,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77065323] [2021-08-21 12:00:01,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:01,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:01,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:01,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:01,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77065323] [2021-08-21 12:00:01,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77065323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:01,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286658965] [2021-08-21 12:00:01,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:00:01,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:01,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:01,297 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 12:00:01,298 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 12:00:02,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:00:02,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:02,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:02,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:02,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286658965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:02,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:02,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:00:02,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739574862] [2021-08-21 12:00:02,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:00:02,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:02,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:00:02,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:00:02,715 INFO L87 Difference]: Start difference. First operand 699 states and 2044 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:03,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:03,122 INFO L93 Difference]: Finished difference Result 1249 states and 3308 transitions. [2021-08-21 12:00:03,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 12:00:03,122 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:00:03,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:03,124 INFO L225 Difference]: With dead ends: 1249 [2021-08-21 12:00:03,124 INFO L226 Difference]: Without dead ends: 1240 [2021-08-21 12:00:03,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 326.0ms TimeCoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:00:03,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-08-21 12:00:03,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 724. [2021-08-21 12:00:03,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.936376210235131) internal successors, (2123), 723 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:03,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 2123 transitions. [2021-08-21 12:00:03,140 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 2123 transitions. Word has length 20 [2021-08-21 12:00:03,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:03,141 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 2123 transitions. [2021-08-21 12:00:03,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:03,141 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 2123 transitions. [2021-08-21 12:00:03,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:03,142 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:03,142 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:03,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:03,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:03,360 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:03,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:03,360 INFO L82 PathProgramCache]: Analyzing trace with hash 440996257, now seen corresponding path program 111 times [2021-08-21 12:00:03,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:03,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493726701] [2021-08-21 12:00:03,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:03,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:03,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:03,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:03,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493726701] [2021-08-21 12:00:03,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493726701] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:03,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521890138] [2021-08-21 12:00:03,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:00:03,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:03,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:03,415 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 12:00:03,415 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 12:00:04,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:00:04,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:04,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:04,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:04,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521890138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:04,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:04,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:00:04,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790013266] [2021-08-21 12:00:04,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:00:04,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:04,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:00:04,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:00:04,844 INFO L87 Difference]: Start difference. First operand 724 states and 2123 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:05,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:05,157 INFO L93 Difference]: Finished difference Result 1262 states and 3371 transitions. [2021-08-21 12:00:05,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 12:00:05,158 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:00:05,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:05,159 INFO L225 Difference]: With dead ends: 1262 [2021-08-21 12:00:05,159 INFO L226 Difference]: Without dead ends: 1250 [2021-08-21 12:00:05,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 270.2ms TimeCoverageRelationStatistics Valid=374, Invalid=1186, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:00:05,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-08-21 12:00:05,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 734. [2021-08-21 12:00:05,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.9263301500682126) internal successors, (2145), 733 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:05,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2145 transitions. [2021-08-21 12:00:05,170 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2145 transitions. Word has length 20 [2021-08-21 12:00:05,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:05,170 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 2145 transitions. [2021-08-21 12:00:05,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:05,170 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2145 transitions. [2021-08-21 12:00:05,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:05,171 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:05,171 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:05,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-21 12:00:05,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-21 12:00:05,372 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:05,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:05,372 INFO L82 PathProgramCache]: Analyzing trace with hash -599239541, now seen corresponding path program 112 times [2021-08-21 12:00:05,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:05,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589640304] [2021-08-21 12:00:05,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:05,372 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:05,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:05,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589640304] [2021-08-21 12:00:05,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589640304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:05,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034602816] [2021-08-21 12:00:05,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:00:05,429 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:05,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:05,430 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 12:00:05,431 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 12:00:06,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:00:06,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:06,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:06,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:06,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:06,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034602816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:06,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:06,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:00:06,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448154843] [2021-08-21 12:00:06,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:00:06,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:06,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:00:06,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:00:06,870 INFO L87 Difference]: Start difference. First operand 734 states and 2145 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:07,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:07,104 INFO L93 Difference]: Finished difference Result 1109 states and 3026 transitions. [2021-08-21 12:00:07,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:00:07,105 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:00:07,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:07,106 INFO L225 Difference]: With dead ends: 1109 [2021-08-21 12:00:07,106 INFO L226 Difference]: Without dead ends: 1097 [2021-08-21 12:00:07,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 227.6ms TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:00:07,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-08-21 12:00:07,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 734. [2021-08-21 12:00:07,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.922237380627558) internal successors, (2142), 733 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:07,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2142 transitions. [2021-08-21 12:00:07,116 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2142 transitions. Word has length 20 [2021-08-21 12:00:07,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:07,116 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 2142 transitions. [2021-08-21 12:00:07,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:07,117 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2142 transitions. [2021-08-21 12:00:07,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:07,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:07,120 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:07,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-08-21 12:00:07,336 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,SelfDestructingSolverStorable125 [2021-08-21 12:00:07,337 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:07,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:07,337 INFO L82 PathProgramCache]: Analyzing trace with hash 2045038283, now seen corresponding path program 113 times [2021-08-21 12:00:07,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:07,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598855073] [2021-08-21 12:00:07,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:07,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:07,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:07,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:07,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598855073] [2021-08-21 12:00:07,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598855073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:07,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993588835] [2021-08-21 12:00:07,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:00:07,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:07,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:07,390 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 12:00:07,390 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 12:00:08,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:00:08,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:08,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:08,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:08,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993588835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:08,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:08,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-08-21 12:00:08,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609409452] [2021-08-21 12:00:08,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:00:08,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:08,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:00:08,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:00:08,852 INFO L87 Difference]: Start difference. First operand 734 states and 2142 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 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 12:00:09,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:09,185 INFO L93 Difference]: Finished difference Result 1207 states and 3153 transitions. [2021-08-21 12:00:09,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:00:09,186 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 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 20 [2021-08-21 12:00:09,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:09,187 INFO L225 Difference]: With dead ends: 1207 [2021-08-21 12:00:09,187 INFO L226 Difference]: Without dead ends: 1201 [2021-08-21 12:00:09,188 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 283.9ms TimeCoverageRelationStatistics Valid=545, Invalid=937, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:00:09,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-08-21 12:00:09,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 788. [2021-08-21 12:00:09,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 2.9479034307496823) internal successors, (2320), 787 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:09,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2320 transitions. [2021-08-21 12:00:09,199 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2320 transitions. Word has length 20 [2021-08-21 12:00:09,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:09,199 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 2320 transitions. [2021-08-21 12:00:09,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 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 12:00:09,199 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2320 transitions. [2021-08-21 12:00:09,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:09,200 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:09,200 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:09,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-21 12:00:09,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:09,401 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:09,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:09,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1580447179, now seen corresponding path program 114 times [2021-08-21 12:00:09,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:09,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779350162] [2021-08-21 12:00:09,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:09,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:09,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:09,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779350162] [2021-08-21 12:00:09,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779350162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:09,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665399907] [2021-08-21 12:00:09,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:00:09,454 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:09,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:09,455 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 12:00:09,455 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 12:00:10,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:00:10,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:10,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:10,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:10,918 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:10,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665399907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:10,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:10,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-08-21 12:00:10,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331681900] [2021-08-21 12:00:10,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:00:10,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:10,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:00:10,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:00:10,919 INFO L87 Difference]: Start difference. First operand 788 states and 2320 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:11,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:11,341 INFO L93 Difference]: Finished difference Result 1081 states and 2841 transitions. [2021-08-21 12:00:11,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 12:00:11,342 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:00:11,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:11,344 INFO L225 Difference]: With dead ends: 1081 [2021-08-21 12:00:11,344 INFO L226 Difference]: Without dead ends: 1075 [2021-08-21 12:00:11,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 366.2ms TimeCoverageRelationStatistics Valid=782, Invalid=1570, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:00:11,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-08-21 12:00:11,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 726. [2021-08-21 12:00:11,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 2.9117241379310346) internal successors, (2111), 725 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:11,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2111 transitions. [2021-08-21 12:00:11,357 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2111 transitions. Word has length 20 [2021-08-21 12:00:11,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:11,357 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 2111 transitions. [2021-08-21 12:00:11,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:11,358 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2111 transitions. [2021-08-21 12:00:11,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:11,358 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:11,358 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:11,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-21 12:00:11,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:11,561 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:11,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:11,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1546847951, now seen corresponding path program 115 times [2021-08-21 12:00:11,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:11,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782370647] [2021-08-21 12:00:11,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:11,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:11,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:11,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782370647] [2021-08-21 12:00:11,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782370647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:11,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205682799] [2021-08-21 12:00:11,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:00:11,620 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:11,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:11,621 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 12:00:11,621 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 12:00:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:12,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:12,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:13,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:13,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205682799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:13,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:13,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:00:13,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360023547] [2021-08-21 12:00:13,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:00:13,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:13,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:00:13,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:00:13,093 INFO L87 Difference]: Start difference. First operand 726 states and 2111 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:13,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:13,479 INFO L93 Difference]: Finished difference Result 974 states and 2590 transitions. [2021-08-21 12:00:13,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:00:13,479 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:00:13,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:13,480 INFO L225 Difference]: With dead ends: 974 [2021-08-21 12:00:13,480 INFO L226 Difference]: Without dead ends: 966 [2021-08-21 12:00:13,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 345.7ms TimeCoverageRelationStatistics Valid=776, Invalid=1674, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 12:00:13,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-08-21 12:00:13,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 737. [2021-08-21 12:00:13,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.917119565217391) internal successors, (2147), 736 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:13,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2147 transitions. [2021-08-21 12:00:13,490 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2147 transitions. Word has length 20 [2021-08-21 12:00:13,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:13,490 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 2147 transitions. [2021-08-21 12:00:13,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:13,490 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2147 transitions. [2021-08-21 12:00:13,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:13,491 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:13,491 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:13,511 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 12:00:13,691 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,SelfDestructingSolverStorable128 [2021-08-21 12:00:13,692 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:13,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:13,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1648071801, now seen corresponding path program 116 times [2021-08-21 12:00:13,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:13,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880460195] [2021-08-21 12:00:13,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:13,692 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:13,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:13,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880460195] [2021-08-21 12:00:13,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880460195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:13,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796359835] [2021-08-21 12:00:13,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:00:13,738 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:13,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:13,738 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 12:00:13,739 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 12:00:15,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:00:15,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:15,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:15,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:15,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796359835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:15,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:15,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-08-21 12:00:15,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642212817] [2021-08-21 12:00:15,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:00:15,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:15,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:00:15,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:00:15,239 INFO L87 Difference]: Start difference. First operand 737 states and 2147 transitions. Second operand has 16 states, 16 states have (on average 1.9375) 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 12:00:15,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:15,570 INFO L93 Difference]: Finished difference Result 1269 states and 3314 transitions. [2021-08-21 12:00:15,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:00:15,570 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) 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 20 [2021-08-21 12:00:15,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:15,572 INFO L225 Difference]: With dead ends: 1269 [2021-08-21 12:00:15,572 INFO L226 Difference]: Without dead ends: 1260 [2021-08-21 12:00:15,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 271.2ms TimeCoverageRelationStatistics Valid=495, Invalid=837, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:00:15,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2021-08-21 12:00:15,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 824. [2021-08-21 12:00:15,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.9404617253948966) internal successors, (2420), 823 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:15,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2420 transitions. [2021-08-21 12:00:15,584 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2420 transitions. Word has length 20 [2021-08-21 12:00:15,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:15,584 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 2420 transitions. [2021-08-21 12:00:15,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) 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 12:00:15,584 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2420 transitions. [2021-08-21 12:00:15,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:15,585 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:15,585 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:15,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-08-21 12:00:15,785 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,SelfDestructingSolverStorable129 [2021-08-21 12:00:15,786 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:15,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:15,786 INFO L82 PathProgramCache]: Analyzing trace with hash -2112662905, now seen corresponding path program 117 times [2021-08-21 12:00:15,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:15,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948236366] [2021-08-21 12:00:15,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:15,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:15,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:15,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:15,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:15,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948236366] [2021-08-21 12:00:15,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948236366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:15,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721909884] [2021-08-21 12:00:15,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:00:15,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:15,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:15,833 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 12:00:15,834 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 12:00:17,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:00:17,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:17,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:17,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:17,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:17,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721909884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:17,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:17,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-08-21 12:00:17,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116202687] [2021-08-21 12:00:17,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:00:17,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:17,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:00:17,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:00:17,393 INFO L87 Difference]: Start difference. First operand 824 states and 2420 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:17,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:17,847 INFO L93 Difference]: Finished difference Result 1150 states and 3032 transitions. [2021-08-21 12:00:17,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 12:00:17,848 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:00:17,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:17,849 INFO L225 Difference]: With dead ends: 1150 [2021-08-21 12:00:17,849 INFO L226 Difference]: Without dead ends: 1144 [2021-08-21 12:00:17,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 402.2ms TimeCoverageRelationStatistics Valid=855, Invalid=1797, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 12:00:17,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-08-21 12:00:17,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 795. [2021-08-21 12:00:17,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 2.9168765743073046) internal successors, (2316), 794 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:17,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2316 transitions. [2021-08-21 12:00:17,861 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2316 transitions. Word has length 20 [2021-08-21 12:00:17,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:17,861 INFO L470 AbstractCegarLoop]: Abstraction has 795 states and 2316 transitions. [2021-08-21 12:00:17,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:17,862 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2316 transitions. [2021-08-21 12:00:17,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:17,863 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:17,863 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:17,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:18,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:18,063 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:18,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:18,063 INFO L82 PathProgramCache]: Analyzing trace with hash -2146262133, now seen corresponding path program 118 times [2021-08-21 12:00:18,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:18,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964735359] [2021-08-21 12:00:18,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:18,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:18,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:18,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:18,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:18,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964735359] [2021-08-21 12:00:18,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964735359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:18,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848989897] [2021-08-21 12:00:18,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:00:18,124 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:18,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:18,125 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 12:00:18,126 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 12:00:19,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:00:19,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:19,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:19,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:19,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848989897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:19,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:19,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-08-21 12:00:19,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983914118] [2021-08-21 12:00:19,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:00:19,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:19,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:00:19,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:00:19,653 INFO L87 Difference]: Start difference. First operand 795 states and 2316 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:20,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:20,120 INFO L93 Difference]: Finished difference Result 1155 states and 3056 transitions. [2021-08-21 12:00:20,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 12:00:20,121 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:00:20,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:20,122 INFO L225 Difference]: With dead ends: 1155 [2021-08-21 12:00:20,123 INFO L226 Difference]: Without dead ends: 1147 [2021-08-21 12:00:20,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 416.8ms TimeCoverageRelationStatistics Valid=776, Invalid=1774, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 12:00:20,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-08-21 12:00:20,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 789. [2021-08-21 12:00:20,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 2.9289340101522843) internal successors, (2308), 788 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:20,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 2308 transitions. [2021-08-21 12:00:20,134 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 2308 transitions. Word has length 20 [2021-08-21 12:00:20,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:20,134 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 2308 transitions. [2021-08-21 12:00:20,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:20,134 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 2308 transitions. [2021-08-21 12:00:20,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:20,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:20,135 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:20,156 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 12:00:20,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:20,336 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:20,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:20,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1107129095, now seen corresponding path program 119 times [2021-08-21 12:00:20,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:20,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441891449] [2021-08-21 12:00:20,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:20,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:20,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:20,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441891449] [2021-08-21 12:00:20,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441891449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:20,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497930757] [2021-08-21 12:00:20,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:00:20,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:20,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:20,397 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 12:00:20,398 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 12:00:21,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:00:21,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:21,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:21,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:21,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497930757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:21,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:21,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:00:21,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155201521] [2021-08-21 12:00:21,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:00:21,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:21,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:00:21,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:21,938 INFO L87 Difference]: Start difference. First operand 789 states and 2308 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:22,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:22,346 INFO L93 Difference]: Finished difference Result 1081 states and 2905 transitions. [2021-08-21 12:00:22,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 12:00:22,346 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:00:22,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:22,348 INFO L225 Difference]: With dead ends: 1081 [2021-08-21 12:00:22,348 INFO L226 Difference]: Without dead ends: 1069 [2021-08-21 12:00:22,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 365.7ms TimeCoverageRelationStatistics Valid=746, Invalid=1804, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 12:00:22,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-08-21 12:00:22,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 809. [2021-08-21 12:00:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 2.9294554455445545) internal successors, (2367), 808 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:22,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2367 transitions. [2021-08-21 12:00:22,361 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2367 transitions. Word has length 20 [2021-08-21 12:00:22,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:22,362 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 2367 transitions. [2021-08-21 12:00:22,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:22,362 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2367 transitions. [2021-08-21 12:00:22,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:22,363 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:22,363 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:22,389 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 12:00:22,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:22,581 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:22,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:22,581 INFO L82 PathProgramCache]: Analyzing trace with hash -170367413, now seen corresponding path program 120 times [2021-08-21 12:00:22,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:22,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393193105] [2021-08-21 12:00:22,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:22,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:22,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:22,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:22,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393193105] [2021-08-21 12:00:22,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393193105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:22,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87114083] [2021-08-21 12:00:22,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:00:22,628 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:22,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:22,633 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 12:00:22,634 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 12:00:24,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:00:24,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:24,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:24,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:24,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87114083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:24,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:24,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-08-21 12:00:24,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063714697] [2021-08-21 12:00:24,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:00:24,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:24,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:00:24,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:00:24,205 INFO L87 Difference]: Start difference. First operand 809 states and 2367 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:24,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:24,560 INFO L93 Difference]: Finished difference Result 1520 states and 4046 transitions. [2021-08-21 12:00:24,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:00:24,560 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:00:24,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:24,563 INFO L225 Difference]: With dead ends: 1520 [2021-08-21 12:00:24,563 INFO L226 Difference]: Without dead ends: 1514 [2021-08-21 12:00:24,563 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 275.6ms TimeCoverageRelationStatistics Valid=491, Invalid=841, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:00:24,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2021-08-21 12:00:24,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 989. [2021-08-21 12:00:24,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 2.9898785425101213) internal successors, (2954), 988 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:24,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 2954 transitions. [2021-08-21 12:00:24,579 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 2954 transitions. Word has length 20 [2021-08-21 12:00:24,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:24,579 INFO L470 AbstractCegarLoop]: Abstraction has 989 states and 2954 transitions. [2021-08-21 12:00:24,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:24,579 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 2954 transitions. [2021-08-21 12:00:24,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:24,580 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:24,580 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:24,602 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 12:00:24,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-21 12:00:24,785 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:24,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:24,785 INFO L82 PathProgramCache]: Analyzing trace with hash -634958517, now seen corresponding path program 121 times [2021-08-21 12:00:24,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:24,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905650999] [2021-08-21 12:00:24,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:24,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:24,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:24,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:24,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905650999] [2021-08-21 12:00:24,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905650999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:24,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957007571] [2021-08-21 12:00:24,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:00:24,829 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:24,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:24,829 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 12:00:24,830 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 12:00:26,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:26,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:26,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:26,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957007571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:26,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:26,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-08-21 12:00:26,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287542157] [2021-08-21 12:00:26,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:00:26,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:26,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:00:26,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:00:26,350 INFO L87 Difference]: Start difference. First operand 989 states and 2954 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 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 12:00:26,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:26,876 INFO L93 Difference]: Finished difference Result 1383 states and 3716 transitions. [2021-08-21 12:00:26,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-21 12:00:26,877 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 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 20 [2021-08-21 12:00:26,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:26,878 INFO L225 Difference]: With dead ends: 1383 [2021-08-21 12:00:26,879 INFO L226 Difference]: Without dead ends: 1379 [2021-08-21 12:00:26,879 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 461.4ms TimeCoverageRelationStatistics Valid=988, Invalid=2204, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 12:00:26,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2021-08-21 12:00:26,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 956. [2021-08-21 12:00:26,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 2.966492146596859) internal successors, (2833), 955 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:26,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 2833 transitions. [2021-08-21 12:00:26,892 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 2833 transitions. Word has length 20 [2021-08-21 12:00:26,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:26,892 INFO L470 AbstractCegarLoop]: Abstraction has 956 states and 2833 transitions. [2021-08-21 12:00:26,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 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 12:00:26,892 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 2833 transitions. [2021-08-21 12:00:26,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:26,893 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:26,893 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:26,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-08-21 12:00:27,093 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,SelfDestructingSolverStorable134 [2021-08-21 12:00:27,094 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:27,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:27,094 INFO L82 PathProgramCache]: Analyzing trace with hash -668557745, now seen corresponding path program 122 times [2021-08-21 12:00:27,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:27,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820203902] [2021-08-21 12:00:27,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:27,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:27,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:27,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820203902] [2021-08-21 12:00:27,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820203902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:27,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167143075] [2021-08-21 12:00:27,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:00:27,166 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:27,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:27,166 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 12:00:27,167 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 12:00:28,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:00:28,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:28,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:28,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:28,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167143075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:28,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:28,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-08-21 12:00:28,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177903999] [2021-08-21 12:00:28,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:00:28,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:28,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:00:28,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:00:28,716 INFO L87 Difference]: Start difference. First operand 956 states and 2833 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 12:00:29,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:29,187 INFO L93 Difference]: Finished difference Result 1412 states and 3831 transitions. [2021-08-21 12:00:29,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 12:00:29,188 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 20 [2021-08-21 12:00:29,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:29,189 INFO L225 Difference]: With dead ends: 1412 [2021-08-21 12:00:29,189 INFO L226 Difference]: Without dead ends: 1404 [2021-08-21 12:00:29,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 423.1ms TimeCoverageRelationStatistics Valid=842, Invalid=2020, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 12:00:29,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-08-21 12:00:29,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1024. [2021-08-21 12:00:29,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 2.9980449657869013) internal successors, (3067), 1023 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:29,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 3067 transitions. [2021-08-21 12:00:29,203 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 3067 transitions. Word has length 20 [2021-08-21 12:00:29,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:29,203 INFO L470 AbstractCegarLoop]: Abstraction has 1024 states and 3067 transitions. [2021-08-21 12:00:29,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 12:00:29,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 3067 transitions. [2021-08-21 12:00:29,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:29,205 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:29,205 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:29,225 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 12:00:29,405 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,SelfDestructingSolverStorable135 [2021-08-21 12:00:29,405 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:29,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:29,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1710133813, now seen corresponding path program 123 times [2021-08-21 12:00:29,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:29,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344048207] [2021-08-21 12:00:29,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:29,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:29,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:29,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:29,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344048207] [2021-08-21 12:00:29,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344048207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:29,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98917030] [2021-08-21 12:00:29,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:00:29,458 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:29,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:29,459 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 12:00:29,460 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 12:00:30,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:00:30,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:30,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:30,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:31,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98917030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:31,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:31,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-08-21 12:00:31,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741372396] [2021-08-21 12:00:31,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:00:31,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:31,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:00:31,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:31,144 INFO L87 Difference]: Start difference. First operand 1024 states and 3067 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 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 12:00:31,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:31,667 INFO L93 Difference]: Finished difference Result 1501 states and 4138 transitions. [2021-08-21 12:00:31,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:00:31,667 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 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 20 [2021-08-21 12:00:31,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:31,670 INFO L225 Difference]: With dead ends: 1501 [2021-08-21 12:00:31,670 INFO L226 Difference]: Without dead ends: 1489 [2021-08-21 12:00:31,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 469.6ms TimeCoverageRelationStatistics Valid=743, Invalid=1909, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 12:00:31,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2021-08-21 12:00:31,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1112. [2021-08-21 12:00:31,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.027902790279028) internal successors, (3364), 1111 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 12:00:31,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3364 transitions. [2021-08-21 12:00:31,713 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3364 transitions. Word has length 20 [2021-08-21 12:00:31,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:31,713 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 3364 transitions. [2021-08-21 12:00:31,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 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 12:00:31,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3364 transitions. [2021-08-21 12:00:31,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:31,715 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:31,715 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:31,737 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 12:00:31,915 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,SelfDestructingSolverStorable136 [2021-08-21 12:00:31,915 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:31,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:31,916 INFO L82 PathProgramCache]: Analyzing trace with hash 360746447, now seen corresponding path program 124 times [2021-08-21 12:00:31,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:31,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923841312] [2021-08-21 12:00:31,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:31,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:31,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:31,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923841312] [2021-08-21 12:00:31,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923841312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:31,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378736157] [2021-08-21 12:00:31,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:00:31,975 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:31,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:31,976 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 12:00:31,979 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 12:00:33,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:00:33,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:33,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:33,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:33,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378736157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:33,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:33,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:00:33,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691052943] [2021-08-21 12:00:33,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:00:33,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:33,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:00:33,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:00:33,564 INFO L87 Difference]: Start difference. First operand 1112 states and 3364 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:33,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:33,979 INFO L93 Difference]: Finished difference Result 1470 states and 4125 transitions. [2021-08-21 12:00:33,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 12:00:33,979 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:00:33,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:33,981 INFO L225 Difference]: With dead ends: 1470 [2021-08-21 12:00:33,981 INFO L226 Difference]: Without dead ends: 1454 [2021-08-21 12:00:33,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 386.3ms TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 12:00:33,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-08-21 12:00:33,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1142. [2021-08-21 12:00:33,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.028045574057844) internal successors, (3455), 1141 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:33,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3455 transitions. [2021-08-21 12:00:33,998 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3455 transitions. Word has length 20 [2021-08-21 12:00:33,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:33,998 INFO L470 AbstractCegarLoop]: Abstraction has 1142 states and 3455 transitions. [2021-08-21 12:00:33,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:33,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3455 transitions. [2021-08-21 12:00:33,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:34,000 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:34,000 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:34,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:34,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:34,201 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:34,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:34,201 INFO L82 PathProgramCache]: Analyzing trace with hash -331329713, now seen corresponding path program 125 times [2021-08-21 12:00:34,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:34,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148706178] [2021-08-21 12:00:34,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:34,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:34,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:34,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148706178] [2021-08-21 12:00:34,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148706178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:34,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643952434] [2021-08-21 12:00:34,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:00:34,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:34,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:34,270 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 12:00:34,277 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 12:00:35,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:00:35,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:35,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:35,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:35,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643952434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:35,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:35,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:00:35,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825574080] [2021-08-21 12:00:35,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:00:35,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:35,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:00:35,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:00:35,811 INFO L87 Difference]: Start difference. First operand 1142 states and 3455 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:35,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:35,914 INFO L93 Difference]: Finished difference Result 1462 states and 4279 transitions. [2021-08-21 12:00:35,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:00:35,914 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:00:35,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:35,916 INFO L225 Difference]: With dead ends: 1462 [2021-08-21 12:00:35,916 INFO L226 Difference]: Without dead ends: 1462 [2021-08-21 12:00:35,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:00:35,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-08-21 12:00:35,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1165. [2021-08-21 12:00:35,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 3.0300687285223367) internal successors, (3527), 1164 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:35,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3527 transitions. [2021-08-21 12:00:35,932 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3527 transitions. Word has length 20 [2021-08-21 12:00:35,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:35,932 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 3527 transitions. [2021-08-21 12:00:35,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:35,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3527 transitions. [2021-08-21 12:00:35,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:35,933 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:35,933 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:35,954 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 12:00:36,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-21 12:00:36,134 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:36,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:36,134 INFO L82 PathProgramCache]: Analyzing trace with hash -2091382653, now seen corresponding path program 126 times [2021-08-21 12:00:36,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:36,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365027922] [2021-08-21 12:00:36,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:36,135 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:36,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:36,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:36,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:36,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365027922] [2021-08-21 12:00:36,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365027922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:36,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427459345] [2021-08-21 12:00:36,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:00:36,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:36,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:36,193 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 12:00:36,194 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 12:00:37,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:00:37,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:37,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:37,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:37,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427459345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:37,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:37,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:00:37,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848682440] [2021-08-21 12:00:37,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:00:37,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:37,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:00:37,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:00:37,744 INFO L87 Difference]: Start difference. First operand 1165 states and 3527 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:37,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:37,905 INFO L93 Difference]: Finished difference Result 1324 states and 3884 transitions. [2021-08-21 12:00:37,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:00:37,906 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:00:37,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:37,908 INFO L225 Difference]: With dead ends: 1324 [2021-08-21 12:00:37,908 INFO L226 Difference]: Without dead ends: 1324 [2021-08-21 12:00:37,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 142.6ms TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:00:37,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-08-21 12:00:37,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1168. [2021-08-21 12:00:37,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.0299914310197087) internal successors, (3536), 1167 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:37,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3536 transitions. [2021-08-21 12:00:37,928 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3536 transitions. Word has length 20 [2021-08-21 12:00:37,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:37,928 INFO L470 AbstractCegarLoop]: Abstraction has 1168 states and 3536 transitions. [2021-08-21 12:00:37,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:37,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3536 transitions. [2021-08-21 12:00:37,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:37,930 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:37,930 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:37,961 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 12:00:38,146 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,SelfDestructingSolverStorable139 [2021-08-21 12:00:38,147 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:38,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:38,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1205584373, now seen corresponding path program 127 times [2021-08-21 12:00:38,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:38,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910559658] [2021-08-21 12:00:38,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:38,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:38,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:38,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910559658] [2021-08-21 12:00:38,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910559658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:38,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322807384] [2021-08-21 12:00:38,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:00:38,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:38,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:38,207 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 12:00:38,208 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 12:00:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:39,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:39,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:39,798 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:39,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322807384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:39,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:39,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:00:39,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392919465] [2021-08-21 12:00:39,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:00:39,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:39,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:00:39,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:00:39,799 INFO L87 Difference]: Start difference. First operand 1168 states and 3536 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:40,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:40,014 INFO L93 Difference]: Finished difference Result 1344 states and 3926 transitions. [2021-08-21 12:00:40,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:00:40,014 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:00:40,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:40,016 INFO L225 Difference]: With dead ends: 1344 [2021-08-21 12:00:40,016 INFO L226 Difference]: Without dead ends: 1344 [2021-08-21 12:00:40,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 173.2ms TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:00:40,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-08-21 12:00:40,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1174. [2021-08-21 12:00:40,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 3.029838022165388) internal successors, (3554), 1173 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 12:00:40,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 3554 transitions. [2021-08-21 12:00:40,030 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 3554 transitions. Word has length 20 [2021-08-21 12:00:40,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:40,030 INFO L470 AbstractCegarLoop]: Abstraction has 1174 states and 3554 transitions. [2021-08-21 12:00:40,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:40,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 3554 transitions. [2021-08-21 12:00:40,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:40,032 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:40,032 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:40,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2021-08-21 12:00:40,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:40,232 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:40,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:40,233 INFO L82 PathProgramCache]: Analyzing trace with hash 901199747, now seen corresponding path program 128 times [2021-08-21 12:00:40,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:40,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331804056] [2021-08-21 12:00:40,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:40,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:40,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:40,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:40,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331804056] [2021-08-21 12:00:40,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331804056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:40,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216623144] [2021-08-21 12:00:40,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:00:40,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:40,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:40,287 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 12:00:40,288 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 12:00:41,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:00:41,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:41,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:41,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:41,841 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:41,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216623144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:41,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:41,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:00:41,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592214784] [2021-08-21 12:00:41,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:00:41,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:41,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:00:41,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:00:41,842 INFO L87 Difference]: Start difference. First operand 1174 states and 3554 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:42,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:42,193 INFO L93 Difference]: Finished difference Result 1444 states and 4134 transitions. [2021-08-21 12:00:42,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:00:42,193 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:00:42,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:42,195 INFO L225 Difference]: With dead ends: 1444 [2021-08-21 12:00:42,195 INFO L226 Difference]: Without dead ends: 1444 [2021-08-21 12:00:42,195 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 249.4ms TimeCoverageRelationStatistics Valid=459, Invalid=873, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:00:42,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-08-21 12:00:42,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1198. [2021-08-21 12:00:42,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.0334168755221387) internal successors, (3631), 1197 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:42,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3631 transitions. [2021-08-21 12:00:42,209 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3631 transitions. Word has length 20 [2021-08-21 12:00:42,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:42,209 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 3631 transitions. [2021-08-21 12:00:42,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:42,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3631 transitions. [2021-08-21 12:00:42,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:42,211 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:42,211 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:42,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-08-21 12:00:42,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:42,411 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:42,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:42,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1247596789, now seen corresponding path program 129 times [2021-08-21 12:00:42,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:42,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050692189] [2021-08-21 12:00:42,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:42,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:42,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:42,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:42,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050692189] [2021-08-21 12:00:42,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050692189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:42,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594955120] [2021-08-21 12:00:42,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:00:42,466 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:42,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:42,466 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 12:00:42,467 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 12:00:43,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:00:43,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:43,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:43,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:44,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594955120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:44,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:44,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:00:44,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788897198] [2021-08-21 12:00:44,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:00:44,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:44,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:00:44,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:00:44,028 INFO L87 Difference]: Start difference. First operand 1198 states and 3631 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:44,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:44,440 INFO L93 Difference]: Finished difference Result 1560 states and 4362 transitions. [2021-08-21 12:00:44,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 12:00:44,440 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:00:44,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:44,443 INFO L225 Difference]: With dead ends: 1560 [2021-08-21 12:00:44,443 INFO L226 Difference]: Without dead ends: 1560 [2021-08-21 12:00:44,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 297.8ms TimeCoverageRelationStatistics Valid=597, Invalid=1043, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 12:00:44,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-08-21 12:00:44,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1182. [2021-08-21 12:00:44,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 3.0389500423370026) internal successors, (3589), 1181 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:44,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 3589 transitions. [2021-08-21 12:00:44,466 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 3589 transitions. Word has length 20 [2021-08-21 12:00:44,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:44,466 INFO L470 AbstractCegarLoop]: Abstraction has 1182 states and 3589 transitions. [2021-08-21 12:00:44,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:44,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 3589 transitions. [2021-08-21 12:00:44,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:44,467 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:44,467 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:44,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2021-08-21 12:00:44,667 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,SelfDestructingSolverStorable142 [2021-08-21 12:00:44,668 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:44,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:44,668 INFO L82 PathProgramCache]: Analyzing trace with hash -676141983, now seen corresponding path program 130 times [2021-08-21 12:00:44,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:44,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573099426] [2021-08-21 12:00:44,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:44,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:44,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:44,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:44,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573099426] [2021-08-21 12:00:44,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573099426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:44,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113517717] [2021-08-21 12:00:44,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:00:44,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:44,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:44,723 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 12:00:44,724 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 12:00:46,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:00:46,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:46,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:46,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:46,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113517717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:46,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:46,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:00:46,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013602155] [2021-08-21 12:00:46,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:00:46,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:46,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:00:46,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:00:46,349 INFO L87 Difference]: Start difference. First operand 1182 states and 3589 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:46,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:46,758 INFO L93 Difference]: Finished difference Result 1402 states and 3999 transitions. [2021-08-21 12:00:46,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:00:46,758 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:00:46,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:46,760 INFO L225 Difference]: With dead ends: 1402 [2021-08-21 12:00:46,760 INFO L226 Difference]: Without dead ends: 1396 [2021-08-21 12:00:46,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 333.2ms TimeCoverageRelationStatistics Valid=781, Invalid=1475, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 12:00:46,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-08-21 12:00:46,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1135. [2021-08-21 12:00:46,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 3.0246913580246915) internal successors, (3430), 1134 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:46,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 3430 transitions. [2021-08-21 12:00:46,775 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 3430 transitions. Word has length 20 [2021-08-21 12:00:46,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:46,776 INFO L470 AbstractCegarLoop]: Abstraction has 1135 states and 3430 transitions. [2021-08-21 12:00:46,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:46,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 3430 transitions. [2021-08-21 12:00:46,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:46,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:46,777 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:46,798 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 12:00:46,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:46,978 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:46,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:46,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1687253767, now seen corresponding path program 131 times [2021-08-21 12:00:46,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:46,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124082002] [2021-08-21 12:00:46,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:46,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:46,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:47,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:47,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124082002] [2021-08-21 12:00:47,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124082002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:47,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140223887] [2021-08-21 12:00:47,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:00:47,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:47,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:47,054 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 12:00:47,055 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 12:00:48,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:00:48,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:48,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:48,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:48,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140223887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:48,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:48,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:00:48,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976408847] [2021-08-21 12:00:48,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:00:48,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:48,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:00:48,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:00:48,649 INFO L87 Difference]: Start difference. First operand 1135 states and 3430 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:48,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:48,971 INFO L93 Difference]: Finished difference Result 1746 states and 4918 transitions. [2021-08-21 12:00:48,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 12:00:48,971 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:00:48,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:48,973 INFO L225 Difference]: With dead ends: 1746 [2021-08-21 12:00:48,973 INFO L226 Difference]: Without dead ends: 1737 [2021-08-21 12:00:48,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 268.1ms TimeCoverageRelationStatistics Valid=424, Invalid=836, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:00:48,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2021-08-21 12:00:49,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1314. [2021-08-21 12:00:49,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1313 states have (on average 3.0662604722010665) internal successors, (4026), 1313 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 12:00:49,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 4026 transitions. [2021-08-21 12:00:49,019 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 4026 transitions. Word has length 20 [2021-08-21 12:00:49,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:49,019 INFO L470 AbstractCegarLoop]: Abstraction has 1314 states and 4026 transitions. [2021-08-21 12:00:49,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:49,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 4026 transitions. [2021-08-21 12:00:49,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:49,022 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:49,022 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:49,052 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 12:00:49,244 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,SelfDestructingSolverStorable144 [2021-08-21 12:00:49,245 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:49,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:49,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1222662663, now seen corresponding path program 132 times [2021-08-21 12:00:49,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:49,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766393774] [2021-08-21 12:00:49,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:49,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:49,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:49,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766393774] [2021-08-21 12:00:49,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766393774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:49,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667432589] [2021-08-21 12:00:49,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:00:49,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:49,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:49,301 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 12:00:49,301 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 12:00:50,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:00:50,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:50,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:50,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:50,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667432589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:50,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:50,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:00:50,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995335014] [2021-08-21 12:00:50,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:00:50,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:50,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:00:50,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:00:50,918 INFO L87 Difference]: Start difference. First operand 1314 states and 4026 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:51,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:51,324 INFO L93 Difference]: Finished difference Result 1701 states and 4827 transitions. [2021-08-21 12:00:51,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 12:00:51,324 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:00:51,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:51,327 INFO L225 Difference]: With dead ends: 1701 [2021-08-21 12:00:51,327 INFO L226 Difference]: Without dead ends: 1697 [2021-08-21 12:00:51,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 314.0ms TimeCoverageRelationStatistics Valid=487, Invalid=1405, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 12:00:51,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2021-08-21 12:00:51,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1246. [2021-08-21 12:00:51,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.031325301204819) internal successors, (3774), 1245 states have internal predecessors, (3774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:51,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 3774 transitions. [2021-08-21 12:00:51,344 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 3774 transitions. Word has length 20 [2021-08-21 12:00:51,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:51,345 INFO L470 AbstractCegarLoop]: Abstraction has 1246 states and 3774 transitions. [2021-08-21 12:00:51,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:51,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 3774 transitions. [2021-08-21 12:00:51,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:51,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:51,346 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:51,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2021-08-21 12:00:51,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:51,547 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:51,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:51,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1189063435, now seen corresponding path program 133 times [2021-08-21 12:00:51,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:51,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869797430] [2021-08-21 12:00:51,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:51,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:51,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:51,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869797430] [2021-08-21 12:00:51,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869797430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:51,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529003403] [2021-08-21 12:00:51,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:00:51,606 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:51,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:51,606 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 12:00:51,607 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 12:00:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:53,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:53,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:53,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529003403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:53,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:53,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:00:53,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014183987] [2021-08-21 12:00:53,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:00:53,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:53,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:00:53,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:00:53,254 INFO L87 Difference]: Start difference. First operand 1246 states and 3774 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:53,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:53,600 INFO L93 Difference]: Finished difference Result 1682 states and 4760 transitions. [2021-08-21 12:00:53,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 12:00:53,601 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:00:53,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:53,603 INFO L225 Difference]: With dead ends: 1682 [2021-08-21 12:00:53,603 INFO L226 Difference]: Without dead ends: 1674 [2021-08-21 12:00:53,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 291.6ms TimeCoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:00:53,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2021-08-21 12:00:53,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1299. [2021-08-21 12:00:53,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.0338983050847457) internal successors, (3938), 1298 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:53,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3938 transitions. [2021-08-21 12:00:53,623 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3938 transitions. Word has length 20 [2021-08-21 12:00:53,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:53,623 INFO L470 AbstractCegarLoop]: Abstraction has 1299 states and 3938 transitions. [2021-08-21 12:00:53,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:53,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3938 transitions. [2021-08-21 12:00:53,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:53,625 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:53,625 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:53,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-08-21 12:00:53,825 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,SelfDestructingSolverStorable146 [2021-08-21 12:00:53,825 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:53,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:53,826 INFO L82 PathProgramCache]: Analyzing trace with hash 147487367, now seen corresponding path program 134 times [2021-08-21 12:00:53,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:53,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619617773] [2021-08-21 12:00:53,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:53,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:53,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:53,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619617773] [2021-08-21 12:00:53,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619617773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:53,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640129974] [2021-08-21 12:00:53,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:00:53,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:53,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:53,887 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 12:00:53,887 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 12:00:55,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:00:55,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:55,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:55,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:55,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640129974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:55,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:55,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:00:55,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949599941] [2021-08-21 12:00:55,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:00:55,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:55,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:00:55,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:00:55,513 INFO L87 Difference]: Start difference. First operand 1299 states and 3938 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:55,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:55,818 INFO L93 Difference]: Finished difference Result 1724 states and 4914 transitions. [2021-08-21 12:00:55,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 12:00:55,819 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:00:55,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:55,821 INFO L225 Difference]: With dead ends: 1724 [2021-08-21 12:00:55,821 INFO L226 Difference]: Without dead ends: 1712 [2021-08-21 12:00:55,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 266.0ms TimeCoverageRelationStatistics Valid=374, Invalid=1186, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:00:55,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-08-21 12:00:55,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1318. [2021-08-21 12:00:55,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.026575550493546) internal successors, (3986), 1317 states have internal predecessors, (3986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:55,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3986 transitions. [2021-08-21 12:00:55,855 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3986 transitions. Word has length 20 [2021-08-21 12:00:55,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:55,855 INFO L470 AbstractCegarLoop]: Abstraction has 1318 states and 3986 transitions. [2021-08-21 12:00:55,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:55,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3986 transitions. [2021-08-21 12:00:55,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:55,857 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:55,857 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:55,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:56,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-08-21 12:00:56,058 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:56,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:56,058 INFO L82 PathProgramCache]: Analyzing trace with hash -2076599669, now seen corresponding path program 135 times [2021-08-21 12:00:56,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:56,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084638653] [2021-08-21 12:00:56,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:56,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:56,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:56,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:56,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084638653] [2021-08-21 12:00:56,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084638653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:56,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685953196] [2021-08-21 12:00:56,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:00:56,119 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:56,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:56,120 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 12:00:56,121 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 12:00:57,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:00:57,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:57,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:57,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:57,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685953196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:57,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:57,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:00:57,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000119087] [2021-08-21 12:00:57,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:00:57,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:57,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:00:57,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:00:57,734 INFO L87 Difference]: Start difference. First operand 1318 states and 3986 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:57,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:57,982 INFO L93 Difference]: Finished difference Result 1567 states and 4524 transitions. [2021-08-21 12:00:57,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:00:57,983 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:00:57,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:57,985 INFO L225 Difference]: With dead ends: 1567 [2021-08-21 12:00:57,985 INFO L226 Difference]: Without dead ends: 1559 [2021-08-21 12:00:57,985 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 247.7ms TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:00:57,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-08-21 12:00:57,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1318. [2021-08-21 12:00:58,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.023538344722855) internal successors, (3982), 1317 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:58,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3982 transitions. [2021-08-21 12:00:58,004 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3982 transitions. Word has length 20 [2021-08-21 12:00:58,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:58,004 INFO L470 AbstractCegarLoop]: Abstraction has 1318 states and 3982 transitions. [2021-08-21 12:00:58,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:58,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3982 transitions. [2021-08-21 12:00:58,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:00:58,006 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:58,007 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:58,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2021-08-21 12:00:58,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-08-21 12:00:58,221 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:58,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:58,221 INFO L82 PathProgramCache]: Analyzing trace with hash 703275655, now seen corresponding path program 136 times [2021-08-21 12:00:58,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:58,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580547095] [2021-08-21 12:00:58,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:58,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:58,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:58,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580547095] [2021-08-21 12:00:58,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580547095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:58,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609491898] [2021-08-21 12:00:58,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:00:58,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:58,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:58,277 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 12:00:58,277 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 12:00:59,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:00:59,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:59,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:59,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:59,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:59,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609491898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:59,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:59,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:00:59,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935555883] [2021-08-21 12:00:59,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:00:59,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:59,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:00:59,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:00:59,963 INFO L87 Difference]: Start difference. First operand 1318 states and 3982 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:00,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:00,052 INFO L93 Difference]: Finished difference Result 1464 states and 4346 transitions. [2021-08-21 12:01:00,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:01:00,053 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:00,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:00,055 INFO L225 Difference]: With dead ends: 1464 [2021-08-21 12:01:00,055 INFO L226 Difference]: Without dead ends: 1454 [2021-08-21 12:01:00,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:01:00,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-08-21 12:01:00,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1318. [2021-08-21 12:01:00,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.0227790432801824) internal successors, (3981), 1317 states have internal predecessors, (3981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:00,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3981 transitions. [2021-08-21 12:01:00,069 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3981 transitions. Word has length 20 [2021-08-21 12:01:00,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:00,070 INFO L470 AbstractCegarLoop]: Abstraction has 1318 states and 3981 transitions. [2021-08-21 12:01:00,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:00,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3981 transitions. [2021-08-21 12:01:00,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:00,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:00,071 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:00,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2021-08-21 12:01:00,272 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,SelfDestructingSolverStorable149 [2021-08-21 12:01:00,272 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:00,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:00,272 INFO L82 PathProgramCache]: Analyzing trace with hash -818448945, now seen corresponding path program 137 times [2021-08-21 12:01:00,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:00,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404600942] [2021-08-21 12:01:00,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:00,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:00,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:00,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404600942] [2021-08-21 12:01:00,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404600942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:00,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899280938] [2021-08-21 12:01:00,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:00,350 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:00,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:00,351 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 12:01:00,351 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 12:01:01,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:01:01,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:01,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:01,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:02,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:02,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899280938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:02,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:02,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:01:02,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563922690] [2021-08-21 12:01:02,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:01:02,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:02,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:01:02,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:01:02,041 INFO L87 Difference]: Start difference. First operand 1318 states and 3981 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 12:01:02,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:02,360 INFO L93 Difference]: Finished difference Result 1488 states and 4332 transitions. [2021-08-21 12:01:02,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:01:02,360 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 20 [2021-08-21 12:01:02,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:02,363 INFO L225 Difference]: With dead ends: 1488 [2021-08-21 12:01:02,363 INFO L226 Difference]: Without dead ends: 1488 [2021-08-21 12:01:02,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 291.9ms TimeCoverageRelationStatistics Valid=470, Invalid=1012, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:01:02,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2021-08-21 12:01:02,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1320. [2021-08-21 12:01:02,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 3.0227445034116753) internal successors, (3987), 1319 states have internal predecessors, (3987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:02,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 3987 transitions. [2021-08-21 12:01:02,378 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 3987 transitions. Word has length 20 [2021-08-21 12:01:02,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:02,378 INFO L470 AbstractCegarLoop]: Abstraction has 1320 states and 3987 transitions. [2021-08-21 12:01:02,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 12:01:02,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 3987 transitions. [2021-08-21 12:01:02,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:02,380 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:02,380 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:02,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2021-08-21 12:01:02,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:02,580 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:02,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:02,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1757292239, now seen corresponding path program 138 times [2021-08-21 12:01:02,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:02,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179561923] [2021-08-21 12:01:02,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:02,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:02,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:02,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:02,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179561923] [2021-08-21 12:01:02,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179561923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:02,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548866019] [2021-08-21 12:01:02,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:02,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:02,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:02,632 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 12:01:02,632 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 12:01:04,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:01:04,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:04,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:04,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:04,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:04,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548866019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:04,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:04,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-08-21 12:01:04,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011142247] [2021-08-21 12:01:04,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:01:04,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:04,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:01:04,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:01:04,272 INFO L87 Difference]: Start difference. First operand 1320 states and 3987 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:04,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:04,541 INFO L93 Difference]: Finished difference Result 1578 states and 4543 transitions. [2021-08-21 12:01:04,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:01:04,541 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:04,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:04,544 INFO L225 Difference]: With dead ends: 1578 [2021-08-21 12:01:04,544 INFO L226 Difference]: Without dead ends: 1572 [2021-08-21 12:01:04,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 222.6ms TimeCoverageRelationStatistics Valid=359, Invalid=763, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:01:04,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-08-21 12:01:04,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1335. [2021-08-21 12:01:04,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 3.02023988005997) internal successors, (4029), 1334 states have internal predecessors, (4029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:04,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 4029 transitions. [2021-08-21 12:01:04,561 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 4029 transitions. Word has length 20 [2021-08-21 12:01:04,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:04,561 INFO L470 AbstractCegarLoop]: Abstraction has 1335 states and 4029 transitions. [2021-08-21 12:01:04,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:04,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 4029 transitions. [2021-08-21 12:01:04,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:04,563 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:04,563 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:04,584 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 12:01:04,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:04,765 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:04,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:04,765 INFO L82 PathProgramCache]: Analyzing trace with hash 454907343, now seen corresponding path program 139 times [2021-08-21 12:01:04,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:04,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258136000] [2021-08-21 12:01:04,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:04,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:04,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:04,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258136000] [2021-08-21 12:01:04,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258136000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:04,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035383497] [2021-08-21 12:01:04,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:01:04,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:04,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:04,835 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 12:01:04,836 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 12:01:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:06,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:06,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:06,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:06,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035383497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:06,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:06,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-08-21 12:01:06,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414168429] [2021-08-21 12:01:06,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:01:06,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:06,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:01:06,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:01:06,496 INFO L87 Difference]: Start difference. First operand 1335 states and 4029 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:06,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:06,806 INFO L93 Difference]: Finished difference Result 1610 states and 4633 transitions. [2021-08-21 12:01:06,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:01:06,807 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:06,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:06,809 INFO L225 Difference]: With dead ends: 1610 [2021-08-21 12:01:06,809 INFO L226 Difference]: Without dead ends: 1606 [2021-08-21 12:01:06,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 249.2ms TimeCoverageRelationStatistics Valid=383, Invalid=739, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:01:06,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2021-08-21 12:01:06,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1324. [2021-08-21 12:01:06,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.018896447467876) internal successors, (3994), 1323 states have internal predecessors, (3994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:06,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 3994 transitions. [2021-08-21 12:01:06,826 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 3994 transitions. Word has length 20 [2021-08-21 12:01:06,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:06,826 INFO L470 AbstractCegarLoop]: Abstraction has 1324 states and 3994 transitions. [2021-08-21 12:01:06,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:06,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 3994 transitions. [2021-08-21 12:01:06,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:06,828 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:06,828 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:06,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2021-08-21 12:01:07,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:07,029 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:07,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:07,029 INFO L82 PathProgramCache]: Analyzing trace with hash 412894927, now seen corresponding path program 140 times [2021-08-21 12:01:07,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:07,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851805632] [2021-08-21 12:01:07,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:07,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:07,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:07,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:07,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851805632] [2021-08-21 12:01:07,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851805632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:07,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442896771] [2021-08-21 12:01:07,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:07,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:07,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:07,080 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 12:01:07,080 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 12:01:08,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:08,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:08,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:08,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:08,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:08,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442896771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:08,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:08,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-08-21 12:01:08,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763452751] [2021-08-21 12:01:08,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:01:08,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:08,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:01:08,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:01:08,750 INFO L87 Difference]: Start difference. First operand 1324 states and 3994 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:09,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:09,111 INFO L93 Difference]: Finished difference Result 1777 states and 4996 transitions. [2021-08-21 12:01:09,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:01:09,111 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:09,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:09,113 INFO L225 Difference]: With dead ends: 1777 [2021-08-21 12:01:09,113 INFO L226 Difference]: Without dead ends: 1777 [2021-08-21 12:01:09,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 280.7ms TimeCoverageRelationStatistics Valid=545, Invalid=937, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:01:09,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-08-21 12:01:09,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1334. [2021-08-21 12:01:09,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 3.0270067516879218) internal successors, (4035), 1333 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:09,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 4035 transitions. [2021-08-21 12:01:09,131 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 4035 transitions. Word has length 20 [2021-08-21 12:01:09,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:09,131 INFO L470 AbstractCegarLoop]: Abstraction has 1334 states and 4035 transitions. [2021-08-21 12:01:09,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:09,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 4035 transitions. [2021-08-21 12:01:09,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:09,133 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:09,133 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:09,154 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 12:01:09,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:09,337 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:09,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:09,337 INFO L82 PathProgramCache]: Analyzing trace with hash 984349733, now seen corresponding path program 141 times [2021-08-21 12:01:09,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:09,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500640738] [2021-08-21 12:01:09,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:09,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:09,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:09,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:09,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500640738] [2021-08-21 12:01:09,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500640738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:09,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920823782] [2021-08-21 12:01:09,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:01:09,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:09,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:09,387 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 12:01:09,387 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 12:01:10,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:01:10,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:10,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:10,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:11,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920823782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:11,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:11,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-08-21 12:01:11,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344565740] [2021-08-21 12:01:11,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:01:11,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:11,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:01:11,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:01:11,054 INFO L87 Difference]: Start difference. First operand 1334 states and 4035 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:11,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:11,489 INFO L93 Difference]: Finished difference Result 1692 states and 4755 transitions. [2021-08-21 12:01:11,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 12:01:11,489 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:11,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:11,491 INFO L225 Difference]: With dead ends: 1692 [2021-08-21 12:01:11,491 INFO L226 Difference]: Without dead ends: 1683 [2021-08-21 12:01:11,492 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 358.3ms TimeCoverageRelationStatistics Valid=782, Invalid=1570, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:01:11,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-08-21 12:01:11,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1280. [2021-08-21 12:01:11,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.0101641907740424) internal successors, (3850), 1279 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:11,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 3850 transitions. [2021-08-21 12:01:11,528 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 3850 transitions. Word has length 20 [2021-08-21 12:01:11,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:11,528 INFO L470 AbstractCegarLoop]: Abstraction has 1280 states and 3850 transitions. [2021-08-21 12:01:11,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:11,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 3850 transitions. [2021-08-21 12:01:11,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:11,530 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:11,530 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:11,560 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 12:01:11,756 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,SelfDestructingSolverStorable154 [2021-08-21 12:01:11,757 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:11,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:11,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1519579535, now seen corresponding path program 142 times [2021-08-21 12:01:11,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:11,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078760531] [2021-08-21 12:01:11,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:11,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:11,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:11,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:11,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078760531] [2021-08-21 12:01:11,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078760531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:11,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112818817] [2021-08-21 12:01:11,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:11,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:11,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:11,812 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 12:01:11,813 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 12:01:13,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:13,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:13,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:13,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:13,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112818817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:13,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:13,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 12:01:13,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140393685] [2021-08-21 12:01:13,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:01:13,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:13,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:01:13,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:01:13,483 INFO L87 Difference]: Start difference. First operand 1280 states and 3850 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 12:01:13,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:13,903 INFO L93 Difference]: Finished difference Result 1586 states and 4510 transitions. [2021-08-21 12:01:13,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:01:13,903 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 20 [2021-08-21 12:01:13,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:13,906 INFO L225 Difference]: With dead ends: 1586 [2021-08-21 12:01:13,906 INFO L226 Difference]: Without dead ends: 1574 [2021-08-21 12:01:13,906 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 347.2ms TimeCoverageRelationStatistics Valid=776, Invalid=1674, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 12:01:13,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2021-08-21 12:01:13,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1291. [2021-08-21 12:01:13,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 1290 states have (on average 3.011627906976744) internal successors, (3885), 1290 states have internal predecessors, (3885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 3885 transitions. [2021-08-21 12:01:13,923 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 3885 transitions. Word has length 20 [2021-08-21 12:01:13,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:13,923 INFO L470 AbstractCegarLoop]: Abstraction has 1291 states and 3885 transitions. [2021-08-21 12:01:13,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 12:01:13,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 3885 transitions. [2021-08-21 12:01:13,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:13,925 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:13,925 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:13,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2021-08-21 12:01:14,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:14,126 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:14,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:14,126 INFO L82 PathProgramCache]: Analyzing trace with hash -12209661, now seen corresponding path program 143 times [2021-08-21 12:01:14,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:14,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068029144] [2021-08-21 12:01:14,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:14,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:14,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:14,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068029144] [2021-08-21 12:01:14,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068029144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:14,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590726059] [2021-08-21 12:01:14,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:14,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:14,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:14,201 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 12:01:14,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-21 12:01:15,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:01:15,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:15,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:15,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:15,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590726059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:15,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:15,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:01:15,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331988458] [2021-08-21 12:01:15,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:01:15,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:15,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:01:15,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:01:15,939 INFO L87 Difference]: Start difference. First operand 1291 states and 3885 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:16,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:16,299 INFO L93 Difference]: Finished difference Result 1481 states and 4275 transitions. [2021-08-21 12:01:16,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:01:16,299 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:16,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:16,301 INFO L225 Difference]: With dead ends: 1481 [2021-08-21 12:01:16,301 INFO L226 Difference]: Without dead ends: 1481 [2021-08-21 12:01:16,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 323.4ms TimeCoverageRelationStatistics Valid=544, Invalid=1262, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:01:16,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-08-21 12:01:16,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1282. [2021-08-21 12:01:16,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.0101483216237312) internal successors, (3856), 1281 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:16,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 3856 transitions. [2021-08-21 12:01:16,317 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 3856 transitions. Word has length 20 [2021-08-21 12:01:16,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:16,317 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 3856 transitions. [2021-08-21 12:01:16,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:16,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 3856 transitions. [2021-08-21 12:01:16,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:16,319 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:16,319 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:16,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2021-08-21 12:01:16,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-08-21 12:01:16,520 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:16,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:16,520 INFO L82 PathProgramCache]: Analyzing trace with hash -882813301, now seen corresponding path program 144 times [2021-08-21 12:01:16,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:16,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055146188] [2021-08-21 12:01:16,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:16,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:16,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:16,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:16,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055146188] [2021-08-21 12:01:16,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055146188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:16,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008808498] [2021-08-21 12:01:16,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:16,584 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:16,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:16,585 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:16,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-21 12:01:18,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:01:18,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:18,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:18,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:18,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008808498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:18,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:18,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-08-21 12:01:18,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822963311] [2021-08-21 12:01:18,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:01:18,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:18,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:01:18,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:01:18,289 INFO L87 Difference]: Start difference. First operand 1282 states and 3856 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:18,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:18,609 INFO L93 Difference]: Finished difference Result 1620 states and 4620 transitions. [2021-08-21 12:01:18,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:01:18,610 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:18,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:18,612 INFO L225 Difference]: With dead ends: 1620 [2021-08-21 12:01:18,612 INFO L226 Difference]: Without dead ends: 1614 [2021-08-21 12:01:18,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 269.3ms TimeCoverageRelationStatistics Valid=436, Invalid=970, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:01:18,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-08-21 12:01:18,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1305. [2021-08-21 12:01:18,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 1304 states have (on average 3.013803680981595) internal successors, (3930), 1304 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:18,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 3930 transitions. [2021-08-21 12:01:18,629 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 3930 transitions. Word has length 20 [2021-08-21 12:01:18,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:18,629 INFO L470 AbstractCegarLoop]: Abstraction has 1305 states and 3930 transitions. [2021-08-21 12:01:18,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:18,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 3930 transitions. [2021-08-21 12:01:18,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:18,631 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:18,631 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:18,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:18,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-21 12:01:18,853 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:18,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:18,853 INFO L82 PathProgramCache]: Analyzing trace with hash -495255293, now seen corresponding path program 145 times [2021-08-21 12:01:18,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:18,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426307120] [2021-08-21 12:01:18,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:18,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:18,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:18,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:18,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426307120] [2021-08-21 12:01:18,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426307120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:18,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167238162] [2021-08-21 12:01:18,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:01:18,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:18,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:18,901 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:18,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-21 12:01:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:20,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:20,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:20,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167238162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:20,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:20,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-08-21 12:01:20,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236105635] [2021-08-21 12:01:20,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:01:20,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:20,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:01:20,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:01:20,624 INFO L87 Difference]: Start difference. First operand 1305 states and 3930 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:20,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:20,935 INFO L93 Difference]: Finished difference Result 1830 states and 5202 transitions. [2021-08-21 12:01:20,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:01:20,935 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:20,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:20,938 INFO L225 Difference]: With dead ends: 1830 [2021-08-21 12:01:20,938 INFO L226 Difference]: Without dead ends: 1828 [2021-08-21 12:01:20,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 244.2ms TimeCoverageRelationStatistics Valid=408, Invalid=782, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:01:20,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-08-21 12:01:20,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1345. [2021-08-21 12:01:20,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 3.013392857142857) internal successors, (4050), 1344 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:20,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4050 transitions. [2021-08-21 12:01:20,955 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4050 transitions. Word has length 20 [2021-08-21 12:01:20,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:20,955 INFO L470 AbstractCegarLoop]: Abstraction has 1345 states and 4050 transitions. [2021-08-21 12:01:20,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:20,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4050 transitions. [2021-08-21 12:01:20,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:20,957 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:20,957 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:20,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:21,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-21 12:01:21,173 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:21,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:21,173 INFO L82 PathProgramCache]: Analyzing trace with hash 348530571, now seen corresponding path program 146 times [2021-08-21 12:01:21,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:21,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912398691] [2021-08-21 12:01:21,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:21,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:21,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:21,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:21,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912398691] [2021-08-21 12:01:21,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912398691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:21,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348675126] [2021-08-21 12:01:21,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:21,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:21,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:21,225 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:21,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-21 12:01:22,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:22,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:22,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:22,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:22,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:22,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348675126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:22,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:22,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-08-21 12:01:22,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866713288] [2021-08-21 12:01:22,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:01:22,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:22,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:01:22,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:01:22,973 INFO L87 Difference]: Start difference. First operand 1345 states and 4050 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:23,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:23,315 INFO L93 Difference]: Finished difference Result 1888 states and 5315 transitions. [2021-08-21 12:01:23,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:01:23,315 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:23,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:23,318 INFO L225 Difference]: With dead ends: 1888 [2021-08-21 12:01:23,318 INFO L226 Difference]: Without dead ends: 1888 [2021-08-21 12:01:23,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 268.6ms TimeCoverageRelationStatistics Valid=495, Invalid=837, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:01:23,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-08-21 12:01:23,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1399. [2021-08-21 12:01:23,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 3.0257510729613735) internal successors, (4230), 1398 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:23,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 4230 transitions. [2021-08-21 12:01:23,339 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 4230 transitions. Word has length 20 [2021-08-21 12:01:23,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:23,339 INFO L470 AbstractCegarLoop]: Abstraction has 1399 states and 4230 transitions. [2021-08-21 12:01:23,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:23,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 4230 transitions. [2021-08-21 12:01:23,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:23,341 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:23,341 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:23,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:23,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-08-21 12:01:23,541 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:23,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:23,542 INFO L82 PathProgramCache]: Analyzing trace with hash 919985377, now seen corresponding path program 147 times [2021-08-21 12:01:23,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:23,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39071714] [2021-08-21 12:01:23,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:23,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:23,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:23,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:23,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39071714] [2021-08-21 12:01:23,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39071714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:23,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014113009] [2021-08-21 12:01:23,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:01:23,587 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:23,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:23,588 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:23,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-21 12:01:25,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:01:25,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:25,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:25,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:25,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014113009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:25,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:25,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-08-21 12:01:25,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658470571] [2021-08-21 12:01:25,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:01:25,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:25,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:01:25,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:01:25,325 INFO L87 Difference]: Start difference. First operand 1399 states and 4230 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:25,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:25,804 INFO L93 Difference]: Finished difference Result 1840 states and 5179 transitions. [2021-08-21 12:01:25,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 12:01:25,804 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:25,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:25,806 INFO L225 Difference]: With dead ends: 1840 [2021-08-21 12:01:25,806 INFO L226 Difference]: Without dead ends: 1831 [2021-08-21 12:01:25,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 392.8ms TimeCoverageRelationStatistics Valid=855, Invalid=1797, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 12:01:25,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-08-21 12:01:25,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1368. [2021-08-21 12:01:25,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1367 states have (on average 3.015362106803219) internal successors, (4122), 1367 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 12:01:25,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 4122 transitions. [2021-08-21 12:01:25,824 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 4122 transitions. Word has length 20 [2021-08-21 12:01:25,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:25,824 INFO L470 AbstractCegarLoop]: Abstraction has 1368 states and 4122 transitions. [2021-08-21 12:01:25,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:25,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 4122 transitions. [2021-08-21 12:01:25,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:25,826 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:25,826 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:25,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2021-08-21 12:01:26,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:26,027 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:26,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:26,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1455215179, now seen corresponding path program 148 times [2021-08-21 12:01:26,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:26,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469490878] [2021-08-21 12:01:26,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:26,027 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:26,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:26,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:26,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469490878] [2021-08-21 12:01:26,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469490878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:26,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946603494] [2021-08-21 12:01:26,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:26,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:26,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:26,079 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:26,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-21 12:01:27,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:27,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:27,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:27,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:27,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946603494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:27,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:27,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-08-21 12:01:27,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472051159] [2021-08-21 12:01:27,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:01:27,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:27,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:01:27,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:01:27,841 INFO L87 Difference]: Start difference. First operand 1368 states and 4122 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:28,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:28,277 INFO L93 Difference]: Finished difference Result 1834 states and 5156 transitions. [2021-08-21 12:01:28,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 12:01:28,278 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:28,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:28,280 INFO L225 Difference]: With dead ends: 1834 [2021-08-21 12:01:28,280 INFO L226 Difference]: Without dead ends: 1822 [2021-08-21 12:01:28,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 392.8ms TimeCoverageRelationStatistics Valid=776, Invalid=1774, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 12:01:28,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2021-08-21 12:01:28,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1349. [2021-08-21 12:01:28,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.015578635014837) internal successors, (4065), 1348 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:28,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4065 transitions. [2021-08-21 12:01:28,300 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4065 transitions. Word has length 20 [2021-08-21 12:01:28,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:28,300 INFO L470 AbstractCegarLoop]: Abstraction has 1349 states and 4065 transitions. [2021-08-21 12:01:28,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:28,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4065 transitions. [2021-08-21 12:01:28,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:28,301 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:28,301 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:28,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:28,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-08-21 12:01:28,502 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:28,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:28,502 INFO L82 PathProgramCache]: Analyzing trace with hash 867469857, now seen corresponding path program 149 times [2021-08-21 12:01:28,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:28,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354307109] [2021-08-21 12:01:28,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:28,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:28,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:28,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354307109] [2021-08-21 12:01:28,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354307109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:28,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602172869] [2021-08-21 12:01:28,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:28,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:28,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:28,567 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:28,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-21 12:01:30,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:01:30,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:30,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:30,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:30,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602172869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:30,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:30,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 12:01:30,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817165968] [2021-08-21 12:01:30,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:01:30,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:30,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:01:30,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:01:30,343 INFO L87 Difference]: Start difference. First operand 1349 states and 4065 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:30,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:30,830 INFO L93 Difference]: Finished difference Result 1747 states and 4974 transitions. [2021-08-21 12:01:30,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 12:01:30,830 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:30,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:30,833 INFO L225 Difference]: With dead ends: 1747 [2021-08-21 12:01:30,833 INFO L226 Difference]: Without dead ends: 1729 [2021-08-21 12:01:30,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 413.7ms TimeCoverageRelationStatistics Valid=746, Invalid=1804, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 12:01:30,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-08-21 12:01:30,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1363. [2021-08-21 12:01:30,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 3.0198237885462555) internal successors, (4113), 1362 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:30,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 4113 transitions. [2021-08-21 12:01:30,851 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 4113 transitions. Word has length 20 [2021-08-21 12:01:30,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:30,851 INFO L470 AbstractCegarLoop]: Abstraction has 1363 states and 4113 transitions. [2021-08-21 12:01:30,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:30,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 4113 transitions. [2021-08-21 12:01:30,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:30,853 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:30,853 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:30,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:31,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:31,053 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:31,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:31,054 INFO L82 PathProgramCache]: Analyzing trace with hash -788595633, now seen corresponding path program 150 times [2021-08-21 12:01:31,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:31,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141909137] [2021-08-21 12:01:31,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:31,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:31,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:31,130 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:31,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:31,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141909137] [2021-08-21 12:01:31,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141909137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:31,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352691289] [2021-08-21 12:01:31,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:31,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:31,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:31,131 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:31,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-21 12:01:32,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:01:32,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:32,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:32,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:32,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:32,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352691289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:32,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:32,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:01:32,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297444021] [2021-08-21 12:01:32,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:01:32,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:32,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:01:32,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:01:32,908 INFO L87 Difference]: Start difference. First operand 1363 states and 4113 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:33,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:33,301 INFO L93 Difference]: Finished difference Result 1698 states and 4871 transitions. [2021-08-21 12:01:33,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:01:33,301 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:33,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:33,303 INFO L225 Difference]: With dead ends: 1698 [2021-08-21 12:01:33,303 INFO L226 Difference]: Without dead ends: 1698 [2021-08-21 12:01:33,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 372.6ms TimeCoverageRelationStatistics Valid=603, Invalid=1467, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 12:01:33,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-08-21 12:01:33,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1400. [2021-08-21 12:01:33,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 3.013581129378127) internal successors, (4216), 1399 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:33,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 4216 transitions. [2021-08-21 12:01:33,320 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 4216 transitions. Word has length 20 [2021-08-21 12:01:33,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:33,320 INFO L470 AbstractCegarLoop]: Abstraction has 1400 states and 4216 transitions. [2021-08-21 12:01:33,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:33,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 4216 transitions. [2021-08-21 12:01:33,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:33,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:33,322 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:33,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:33,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:33,522 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:33,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:33,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1121706417, now seen corresponding path program 151 times [2021-08-21 12:01:33,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:33,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600656536] [2021-08-21 12:01:33,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:33,523 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:33,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:33,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600656536] [2021-08-21 12:01:33,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600656536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:33,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847215073] [2021-08-21 12:01:33,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:01:33,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:33,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:33,577 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:33,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-21 12:01:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:35,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:35,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:35,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847215073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:35,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:35,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-08-21 12:01:35,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740070939] [2021-08-21 12:01:35,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:01:35,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:35,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:01:35,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:01:35,386 INFO L87 Difference]: Start difference. First operand 1400 states and 4216 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:35,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:35,737 INFO L93 Difference]: Finished difference Result 1946 states and 5516 transitions. [2021-08-21 12:01:35,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:01:35,737 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:35,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:35,740 INFO L225 Difference]: With dead ends: 1946 [2021-08-21 12:01:35,740 INFO L226 Difference]: Without dead ends: 1946 [2021-08-21 12:01:35,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 307.6ms TimeCoverageRelationStatistics Valid=468, Invalid=1092, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:01:35,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2021-08-21 12:01:35,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1486. [2021-08-21 12:01:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.0202020202020203) internal successors, (4485), 1485 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:35,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 4485 transitions. [2021-08-21 12:01:35,759 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 4485 transitions. Word has length 20 [2021-08-21 12:01:35,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:35,759 INFO L470 AbstractCegarLoop]: Abstraction has 1486 states and 4485 transitions. [2021-08-21 12:01:35,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:35,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 4485 transitions. [2021-08-21 12:01:35,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:35,760 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:35,760 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:35,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2021-08-21 12:01:35,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:35,962 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:35,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:35,962 INFO L82 PathProgramCache]: Analyzing trace with hash 114474063, now seen corresponding path program 152 times [2021-08-21 12:01:35,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:35,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500717297] [2021-08-21 12:01:35,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:35,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:36,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:36,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500717297] [2021-08-21 12:01:36,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500717297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:36,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498967940] [2021-08-21 12:01:36,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:36,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:36,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:36,020 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:36,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-21 12:01:37,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:37,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:37,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:37,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:37,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498967940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:37,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:37,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-08-21 12:01:37,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767100242] [2021-08-21 12:01:37,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:01:37,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:37,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:01:37,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:01:37,796 INFO L87 Difference]: Start difference. First operand 1486 states and 4485 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:38,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:38,136 INFO L93 Difference]: Finished difference Result 2146 states and 6136 transitions. [2021-08-21 12:01:38,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:01:38,137 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:38,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:38,139 INFO L225 Difference]: With dead ends: 2146 [2021-08-21 12:01:38,139 INFO L226 Difference]: Without dead ends: 2146 [2021-08-21 12:01:38,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 273.4ms TimeCoverageRelationStatistics Valid=438, Invalid=894, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:01:38,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2021-08-21 12:01:38,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 1603. [2021-08-21 12:01:38,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 3.034956304619226) internal successors, (4862), 1602 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:38,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 4862 transitions. [2021-08-21 12:01:38,161 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 4862 transitions. Word has length 20 [2021-08-21 12:01:38,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:38,161 INFO L470 AbstractCegarLoop]: Abstraction has 1603 states and 4862 transitions. [2021-08-21 12:01:38,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:38,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 4862 transitions. [2021-08-21 12:01:38,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:38,163 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:38,164 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:38,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:38,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:38,364 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:38,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:38,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1646764465, now seen corresponding path program 153 times [2021-08-21 12:01:38,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:38,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915861207] [2021-08-21 12:01:38,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:38,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:38,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:38,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915861207] [2021-08-21 12:01:38,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915861207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:38,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956862244] [2021-08-21 12:01:38,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:01:38,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:38,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:38,407 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:38,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-08-21 12:01:40,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:01:40,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:40,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:40,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:40,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956862244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:40,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:40,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-08-21 12:01:40,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228016344] [2021-08-21 12:01:40,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:01:40,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:40,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:01:40,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:01:40,234 INFO L87 Difference]: Start difference. First operand 1603 states and 4862 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:40,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:40,583 INFO L93 Difference]: Finished difference Result 2514 states and 7203 transitions. [2021-08-21 12:01:40,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:01:40,583 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:40,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:40,586 INFO L225 Difference]: With dead ends: 2514 [2021-08-21 12:01:40,586 INFO L226 Difference]: Without dead ends: 2514 [2021-08-21 12:01:40,587 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 291.1ms TimeCoverageRelationStatistics Valid=491, Invalid=841, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:01:40,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-08-21 12:01:40,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 1911. [2021-08-21 12:01:40,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 3.0701570680628274) internal successors, (5864), 1910 states have internal predecessors, (5864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:40,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 5864 transitions. [2021-08-21 12:01:40,639 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 5864 transitions. Word has length 20 [2021-08-21 12:01:40,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:40,639 INFO L470 AbstractCegarLoop]: Abstraction has 1911 states and 5864 transitions. [2021-08-21 12:01:40,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:40,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 5864 transitions. [2021-08-21 12:01:40,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:40,641 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:40,641 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:40,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:40,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-08-21 12:01:40,842 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:40,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:40,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1075309659, now seen corresponding path program 154 times [2021-08-21 12:01:40,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:40,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620870503] [2021-08-21 12:01:40,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:40,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:40,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:40,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:40,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620870503] [2021-08-21 12:01:40,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620870503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:40,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527851095] [2021-08-21 12:01:40,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:40,888 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:40,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:40,888 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:40,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-08-21 12:01:42,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:42,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:42,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:42,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:42,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527851095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:42,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:42,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-08-21 12:01:42,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66920524] [2021-08-21 12:01:42,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:01:42,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:42,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:01:42,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:01:42,680 INFO L87 Difference]: Start difference. First operand 1911 states and 5864 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:43,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:43,215 INFO L93 Difference]: Finished difference Result 2413 states and 6919 transitions. [2021-08-21 12:01:43,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-21 12:01:43,215 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:43,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:43,218 INFO L225 Difference]: With dead ends: 2413 [2021-08-21 12:01:43,218 INFO L226 Difference]: Without dead ends: 2407 [2021-08-21 12:01:43,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 460.8ms TimeCoverageRelationStatistics Valid=988, Invalid=2204, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 12:01:43,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2021-08-21 12:01:43,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 1890. [2021-08-21 12:01:43,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.062466913710958) internal successors, (5785), 1889 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:43,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 5785 transitions. [2021-08-21 12:01:43,246 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 5785 transitions. Word has length 20 [2021-08-21 12:01:43,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:43,246 INFO L470 AbstractCegarLoop]: Abstraction has 1890 states and 5785 transitions. [2021-08-21 12:01:43,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:43,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 5785 transitions. [2021-08-21 12:01:43,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:43,248 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:43,248 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:43,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2021-08-21 12:01:43,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-08-21 12:01:43,449 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:43,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:43,449 INFO L82 PathProgramCache]: Analyzing trace with hash -540079857, now seen corresponding path program 155 times [2021-08-21 12:01:43,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:43,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008946052] [2021-08-21 12:01:43,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:43,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:43,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:43,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:43,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008946052] [2021-08-21 12:01:43,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008946052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:43,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420748363] [2021-08-21 12:01:43,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:43,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:43,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:43,497 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:43,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-08-21 12:01:45,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:01:45,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:45,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:45,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:45,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420748363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:45,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:45,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-08-21 12:01:45,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169530920] [2021-08-21 12:01:45,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:01:45,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:45,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:01:45,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:01:45,304 INFO L87 Difference]: Start difference. First operand 1890 states and 5785 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:45,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:45,809 INFO L93 Difference]: Finished difference Result 2435 states and 6986 transitions. [2021-08-21 12:01:45,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 12:01:45,809 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:45,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:45,813 INFO L225 Difference]: With dead ends: 2435 [2021-08-21 12:01:45,813 INFO L226 Difference]: Without dead ends: 2423 [2021-08-21 12:01:45,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 438.3ms TimeCoverageRelationStatistics Valid=842, Invalid=2020, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 12:01:45,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-08-21 12:01:45,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 1924. [2021-08-21 12:01:45,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 3.068642745709828) internal successors, (5901), 1923 states have internal predecessors, (5901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:45,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5901 transitions. [2021-08-21 12:01:45,840 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5901 transitions. Word has length 20 [2021-08-21 12:01:45,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:45,840 INFO L470 AbstractCegarLoop]: Abstraction has 1924 states and 5901 transitions. [2021-08-21 12:01:45,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:45,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5901 transitions. [2021-08-21 12:01:45,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:45,843 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:45,843 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:45,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:46,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-08-21 12:01:46,043 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:46,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:46,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1127825179, now seen corresponding path program 156 times [2021-08-21 12:01:46,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:46,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970572185] [2021-08-21 12:01:46,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:46,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:46,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:46,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:46,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970572185] [2021-08-21 12:01:46,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970572185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:46,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211261807] [2021-08-21 12:01:46,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:46,096 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:46,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:46,097 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:46,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-08-21 12:01:47,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:01:47,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:47,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:47,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:47,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211261807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:47,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:47,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-08-21 12:01:47,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301404683] [2021-08-21 12:01:47,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:01:47,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:47,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:01:47,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:01:47,911 INFO L87 Difference]: Start difference. First operand 1924 states and 5901 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:48,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:48,339 INFO L93 Difference]: Finished difference Result 2515 states and 7235 transitions. [2021-08-21 12:01:48,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:01:48,339 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:48,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:48,342 INFO L225 Difference]: With dead ends: 2515 [2021-08-21 12:01:48,342 INFO L226 Difference]: Without dead ends: 2497 [2021-08-21 12:01:48,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 393.0ms TimeCoverageRelationStatistics Valid=743, Invalid=1909, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 12:01:48,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-08-21 12:01:48,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1989. [2021-08-21 12:01:48,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1989 states, 1988 states have (on average 3.0759557344064388) internal successors, (6115), 1988 states have internal predecessors, (6115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:48,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 6115 transitions. [2021-08-21 12:01:48,371 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 6115 transitions. Word has length 20 [2021-08-21 12:01:48,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:48,371 INFO L470 AbstractCegarLoop]: Abstraction has 1989 states and 6115 transitions. [2021-08-21 12:01:48,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:48,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 6115 transitions. [2021-08-21 12:01:48,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:48,373 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:48,373 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:48,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2021-08-21 12:01:48,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:48,574 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:48,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:48,574 INFO L82 PathProgramCache]: Analyzing trace with hash 2126906319, now seen corresponding path program 157 times [2021-08-21 12:01:48,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:48,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052427153] [2021-08-21 12:01:48,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:48,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:48,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:48,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:48,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052427153] [2021-08-21 12:01:48,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052427153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:48,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697948080] [2021-08-21 12:01:48,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:01:48,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:48,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:48,659 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:48,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-08-21 12:01:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:50,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:50,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:50,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697948080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:50,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:50,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:01:50,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728088377] [2021-08-21 12:01:50,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:01:50,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:50,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:01:50,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:01:50,493 INFO L87 Difference]: Start difference. First operand 1989 states and 6115 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:50,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:50,887 INFO L93 Difference]: Finished difference Result 2460 states and 7169 transitions. [2021-08-21 12:01:50,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 12:01:50,888 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:50,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:50,891 INFO L225 Difference]: With dead ends: 2460 [2021-08-21 12:01:50,891 INFO L226 Difference]: Without dead ends: 2436 [2021-08-21 12:01:50,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 372.0ms TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 12:01:50,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-08-21 12:01:50,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 2023. [2021-08-21 12:01:50,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 3.073689416419387) internal successors, (6215), 2022 states have internal predecessors, (6215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:50,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 6215 transitions. [2021-08-21 12:01:50,919 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 6215 transitions. Word has length 20 [2021-08-21 12:01:50,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:50,919 INFO L470 AbstractCegarLoop]: Abstraction has 2023 states and 6215 transitions. [2021-08-21 12:01:50,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:50,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 6215 transitions. [2021-08-21 12:01:50,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:01:50,921 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:50,921 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:50,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:51,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:51,122 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:51,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:51,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1653562103, now seen corresponding path program 158 times [2021-08-21 12:01:51,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:51,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809600882] [2021-08-21 12:01:51,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:51,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:51,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:51,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:51,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809600882] [2021-08-21 12:01:51,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809600882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:51,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065133465] [2021-08-21 12:01:51,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:51,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:51,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:51,292 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:51,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2021-08-21 12:01:53,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:53,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:53,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:01:53,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:53,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065133465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:53,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:53,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-08-21 12:01:53,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228778102] [2021-08-21 12:01:53,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:01:53,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:53,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:01:53,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:01:53,374 INFO L87 Difference]: Start difference. First operand 2023 states and 6215 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:53,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:53,757 INFO L93 Difference]: Finished difference Result 2290 states and 6704 transitions. [2021-08-21 12:01:53,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:01:53,758 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 12:01:53,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:53,761 INFO L225 Difference]: With dead ends: 2290 [2021-08-21 12:01:53,761 INFO L226 Difference]: Without dead ends: 2264 [2021-08-21 12:01:53,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 297.3ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:01:53,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-08-21 12:01:53,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2067. [2021-08-21 12:01:53,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 3.054211035818006) internal successors, (6310), 2066 states have internal predecessors, (6310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:53,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 6310 transitions. [2021-08-21 12:01:53,788 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 6310 transitions. Word has length 21 [2021-08-21 12:01:53,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:53,789 INFO L470 AbstractCegarLoop]: Abstraction has 2067 states and 6310 transitions. [2021-08-21 12:01:53,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:53,789 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 6310 transitions. [2021-08-21 12:01:53,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:01:53,792 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:53,792 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:53,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:54,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:54,009 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:54,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:54,009 INFO L82 PathProgramCache]: Analyzing trace with hash 344494571, now seen corresponding path program 159 times [2021-08-21 12:01:54,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:54,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817533418] [2021-08-21 12:01:54,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:54,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:54,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:54,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817533418] [2021-08-21 12:01:54,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817533418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:54,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822194169] [2021-08-21 12:01:54,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:01:54,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:54,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:54,174 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:54,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2021-08-21 12:01:55,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:01:55,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:55,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:01:55,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:56,218 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:56,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822194169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:56,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:56,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-08-21 12:01:56,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27130845] [2021-08-21 12:01:56,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:01:56,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:56,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:01:56,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:01:56,219 INFO L87 Difference]: Start difference. First operand 2067 states and 6310 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 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 12:01:56,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:56,493 INFO L93 Difference]: Finished difference Result 2347 states and 6861 transitions. [2021-08-21 12:01:56,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:01:56,494 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 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 21 [2021-08-21 12:01:56,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:56,499 INFO L225 Difference]: With dead ends: 2347 [2021-08-21 12:01:56,499 INFO L226 Difference]: Without dead ends: 2340 [2021-08-21 12:01:56,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 229.8ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:01:56,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2340 states. [2021-08-21 12:01:56,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2340 to 2120. [2021-08-21 12:01:56,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.06465313827277) internal successors, (6494), 2119 states have internal predecessors, (6494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:56,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 6494 transitions. [2021-08-21 12:01:56,564 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 6494 transitions. Word has length 21 [2021-08-21 12:01:56,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:56,564 INFO L470 AbstractCegarLoop]: Abstraction has 2120 states and 6494 transitions. [2021-08-21 12:01:56,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 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 12:01:56,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 6494 transitions. [2021-08-21 12:01:56,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:01:56,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:56,568 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:56,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2021-08-21 12:01:56,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-08-21 12:01:56,768 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:56,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:56,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1959197295, now seen corresponding path program 160 times [2021-08-21 12:01:56,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:56,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93401508] [2021-08-21 12:01:56,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:56,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:56,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:56,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93401508] [2021-08-21 12:01:56,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93401508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:56,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669612989] [2021-08-21 12:01:56,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:56,953 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:56,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:56,953 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:56,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2021-08-21 12:01:58,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:58,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:58,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:01:58,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:58,940 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:58,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669612989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:58,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:58,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-08-21 12:01:58,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734188208] [2021-08-21 12:01:58,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:01:58,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:58,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:01:58,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:01:58,942 INFO L87 Difference]: Start difference. First operand 2120 states and 6494 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 12:01:59,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:59,204 INFO L93 Difference]: Finished difference Result 2333 states and 6841 transitions. [2021-08-21 12:01:59,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:01:59,204 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 21 [2021-08-21 12:01:59,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:59,208 INFO L225 Difference]: With dead ends: 2333 [2021-08-21 12:01:59,208 INFO L226 Difference]: Without dead ends: 2317 [2021-08-21 12:01:59,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 246.6ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:01:59,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-08-21 12:01:59,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2083. [2021-08-21 12:01:59,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:59,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2021-08-21 12:01:59,233 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2021-08-21 12:01:59,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:59,233 INFO L470 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2021-08-21 12:01:59,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 12:01:59,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2021-08-21 12:01:59,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:01:59,236 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:59,236 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:59,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2021-08-21 12:01:59,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:59,436 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:59,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:59,437 INFO L82 PathProgramCache]: Analyzing trace with hash 915949377, now seen corresponding path program 161 times [2021-08-21 12:01:59,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:59,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823287884] [2021-08-21 12:01:59,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:59,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:59,590 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:59,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:59,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823287884] [2021-08-21 12:01:59,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823287884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:59,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888632395] [2021-08-21 12:01:59,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:59,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:59,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:59,591 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:59,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2021-08-21 12:02:01,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:02:01,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:01,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:02:01,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:01,661 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:01,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888632395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:01,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:01,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-08-21 12:02:01,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785463670] [2021-08-21 12:02:01,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:02:01,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:01,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:02:01,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:02:01,662 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:01,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:01,895 INFO L93 Difference]: Finished difference Result 2307 states and 6745 transitions. [2021-08-21 12:02:01,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:02:01,895 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 12:02:01,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:01,898 INFO L225 Difference]: With dead ends: 2307 [2021-08-21 12:02:01,898 INFO L226 Difference]: Without dead ends: 2300 [2021-08-21 12:02:01,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 231.5ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:02:01,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2021-08-21 12:02:01,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 2083. [2021-08-21 12:02:01,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:01,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2021-08-21 12:02:01,924 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2021-08-21 12:02:01,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:01,924 INFO L470 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2021-08-21 12:02:01,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:01,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2021-08-21 12:02:01,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:01,926 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:01,926 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:01,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:02,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:02,127 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:02,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:02,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1451179179, now seen corresponding path program 162 times [2021-08-21 12:02:02,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:02,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458856583] [2021-08-21 12:02:02,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:02,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:02,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:02,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458856583] [2021-08-21 12:02:02,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458856583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:02,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881311527] [2021-08-21 12:02:02,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:02:02,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:02,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:02,281 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:02,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2021-08-21 12:02:04,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:02:04,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:04,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:02:04,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:04,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881311527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:04,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:04,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-08-21 12:02:04,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758310568] [2021-08-21 12:02:04,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:02:04,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:04,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:02:04,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:02:04,337 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:04,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:04,643 INFO L93 Difference]: Finished difference Result 2324 states and 6770 transitions. [2021-08-21 12:02:04,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:02:04,644 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 12:02:04,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:04,647 INFO L225 Difference]: With dead ends: 2324 [2021-08-21 12:02:04,647 INFO L226 Difference]: Without dead ends: 2317 [2021-08-21 12:02:04,647 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 244.8ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:02:04,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-08-21 12:02:04,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2083. [2021-08-21 12:02:04,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:04,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2021-08-21 12:02:04,673 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2021-08-21 12:02:04,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:04,673 INFO L470 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2021-08-21 12:02:04,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:04,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2021-08-21 12:02:04,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:04,676 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:04,676 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:04,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2021-08-21 12:02:04,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:04,876 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:04,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:04,877 INFO L82 PathProgramCache]: Analyzing trace with hash 863433857, now seen corresponding path program 163 times [2021-08-21 12:02:04,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:04,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115478414] [2021-08-21 12:02:04,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:04,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:05,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:05,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115478414] [2021-08-21 12:02:05,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115478414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:05,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305321457] [2021-08-21 12:02:05,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:02:05,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:05,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:05,035 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:05,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2021-08-21 12:02:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:06,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:02:06,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:07,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305321457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:07,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:07,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-08-21 12:02:07,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167953058] [2021-08-21 12:02:07,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:02:07,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:07,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:02:07,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:02:07,109 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:07,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:07,425 INFO L93 Difference]: Finished difference Result 2260 states and 6660 transitions. [2021-08-21 12:02:07,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:02:07,425 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 12:02:07,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:07,429 INFO L225 Difference]: With dead ends: 2260 [2021-08-21 12:02:07,429 INFO L226 Difference]: Without dead ends: 2253 [2021-08-21 12:02:07,429 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 260.4ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:02:07,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-08-21 12:02:07,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 2083. [2021-08-21 12:02:07,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:07,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2021-08-21 12:02:07,457 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2021-08-21 12:02:07,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:07,457 INFO L470 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2021-08-21 12:02:07,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:07,457 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2021-08-21 12:02:07,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:07,459 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:07,459 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:07,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2021-08-21 12:02:07,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:07,660 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:07,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:07,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1681421863, now seen corresponding path program 164 times [2021-08-21 12:02:07,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:07,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234025089] [2021-08-21 12:02:07,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:07,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:07,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:07,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:07,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234025089] [2021-08-21 12:02:07,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234025089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:07,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965066784] [2021-08-21 12:02:07,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:02:07,869 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:07,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:07,870 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:07,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2021-08-21 12:02:09,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:02:09,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:09,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:02:09,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:09,966 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:09,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965066784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:09,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:09,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2021-08-21 12:02:09,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263791673] [2021-08-21 12:02:09,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:02:09,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:09,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:02:09,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:02:09,967 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 12:02:10,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:10,148 INFO L93 Difference]: Finished difference Result 2270 states and 6764 transitions. [2021-08-21 12:02:10,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:02:10,148 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 21 [2021-08-21 12:02:10,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:10,152 INFO L225 Difference]: With dead ends: 2270 [2021-08-21 12:02:10,152 INFO L226 Difference]: Without dead ends: 2263 [2021-08-21 12:02:10,152 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 257.7ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:02:10,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-08-21 12:02:10,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2113. [2021-08-21 12:02:10,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.071022727272727) internal successors, (6486), 2112 states have internal predecessors, (6486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:10,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6486 transitions. [2021-08-21 12:02:10,179 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6486 transitions. Word has length 21 [2021-08-21 12:02:10,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:10,179 INFO L470 AbstractCegarLoop]: Abstraction has 2113 states and 6486 transitions. [2021-08-21 12:02:10,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 12:02:10,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6486 transitions. [2021-08-21 12:02:10,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:10,182 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:10,182 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:10,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2021-08-21 12:02:10,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-08-21 12:02:10,382 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:10,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:10,383 INFO L82 PathProgramCache]: Analyzing trace with hash -998842709, now seen corresponding path program 165 times [2021-08-21 12:02:10,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:10,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221735160] [2021-08-21 12:02:10,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:10,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:10,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:10,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221735160] [2021-08-21 12:02:10,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221735160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:10,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623946347] [2021-08-21 12:02:10,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:02:10,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:10,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:10,568 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:10,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2021-08-21 12:02:12,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:02:12,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:12,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:02:12,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:12,695 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:12,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623946347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:12,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:12,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-08-21 12:02:12,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450760350] [2021-08-21 12:02:12,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:02:12,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:12,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:02:12,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:02:12,696 INFO L87 Difference]: Start difference. First operand 2113 states and 6486 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 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 12:02:12,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:12,883 INFO L93 Difference]: Finished difference Result 2271 states and 6761 transitions. [2021-08-21 12:02:12,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:02:12,883 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 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 21 [2021-08-21 12:02:12,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:12,887 INFO L225 Difference]: With dead ends: 2271 [2021-08-21 12:02:12,887 INFO L226 Difference]: Without dead ends: 2262 [2021-08-21 12:02:12,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:02:12,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-08-21 12:02:12,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2113. [2021-08-21 12:02:12,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.069128787878788) internal successors, (6482), 2112 states have internal predecessors, (6482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:12,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6482 transitions. [2021-08-21 12:02:12,915 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6482 transitions. Word has length 21 [2021-08-21 12:02:12,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:12,915 INFO L470 AbstractCegarLoop]: Abstraction has 2113 states and 6482 transitions. [2021-08-21 12:02:12,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 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 12:02:12,915 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6482 transitions. [2021-08-21 12:02:12,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:12,917 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:12,917 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:12,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2021-08-21 12:02:13,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:13,118 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:13,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:13,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1216830759, now seen corresponding path program 166 times [2021-08-21 12:02:13,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:13,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232487386] [2021-08-21 12:02:13,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:13,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:13,257 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:13,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:13,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232487386] [2021-08-21 12:02:13,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232487386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:13,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193369871] [2021-08-21 12:02:13,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:02:13,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:13,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:13,258 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:13,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2021-08-21 12:02:15,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:02:15,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:15,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:02:15,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:15,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193369871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:15,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:15,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-08-21 12:02:15,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148238692] [2021-08-21 12:02:15,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:02:15,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:15,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:02:15,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:02:15,438 INFO L87 Difference]: Start difference. First operand 2113 states and 6482 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 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 12:02:15,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:15,637 INFO L93 Difference]: Finished difference Result 2235 states and 6688 transitions. [2021-08-21 12:02:15,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:02:15,638 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 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 21 [2021-08-21 12:02:15,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:15,641 INFO L225 Difference]: With dead ends: 2235 [2021-08-21 12:02:15,641 INFO L226 Difference]: Without dead ends: 2228 [2021-08-21 12:02:15,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 225.4ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:02:15,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-08-21 12:02:15,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2113. [2021-08-21 12:02:15,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.069128787878788) internal successors, (6482), 2112 states have internal predecessors, (6482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:15,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6482 transitions. [2021-08-21 12:02:15,667 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6482 transitions. Word has length 21 [2021-08-21 12:02:15,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:15,667 INFO L470 AbstractCegarLoop]: Abstraction has 2113 states and 6482 transitions. [2021-08-21 12:02:15,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 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 12:02:15,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6482 transitions. [2021-08-21 12:02:15,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:15,670 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:15,670 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:15,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2021-08-21 12:02:15,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-08-21 12:02:15,871 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:15,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:15,871 INFO L82 PathProgramCache]: Analyzing trace with hash 176494955, now seen corresponding path program 167 times [2021-08-21 12:02:15,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:15,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631541563] [2021-08-21 12:02:15,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:15,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:16,032 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:16,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:16,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631541563] [2021-08-21 12:02:16,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631541563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:16,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254459720] [2021-08-21 12:02:16,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:02:16,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:16,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:16,034 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:16,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2021-08-21 12:02:17,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:02:17,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:17,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:02:17,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:18,234 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:18,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254459720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:18,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:18,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-08-21 12:02:18,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508394845] [2021-08-21 12:02:18,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:02:18,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:18,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:02:18,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:02:18,235 INFO L87 Difference]: Start difference. First operand 2113 states and 6482 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 12:02:18,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:18,494 INFO L93 Difference]: Finished difference Result 2462 states and 7260 transitions. [2021-08-21 12:02:18,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:02:18,494 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 21 [2021-08-21 12:02:18,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:18,498 INFO L225 Difference]: With dead ends: 2462 [2021-08-21 12:02:18,498 INFO L226 Difference]: Without dead ends: 2445 [2021-08-21 12:02:18,498 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 233.8ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:02:18,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-08-21 12:02:18,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2200. [2021-08-21 12:02:18,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 3.083674397453388) internal successors, (6781), 2199 states have internal predecessors, (6781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:18,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 6781 transitions. [2021-08-21 12:02:18,524 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 6781 transitions. Word has length 21 [2021-08-21 12:02:18,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:18,524 INFO L470 AbstractCegarLoop]: Abstraction has 2200 states and 6781 transitions. [2021-08-21 12:02:18,524 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 12:02:18,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 6781 transitions. [2021-08-21 12:02:18,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:18,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:18,527 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:18,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:18,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:18,727 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:18,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:18,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1791197679, now seen corresponding path program 168 times [2021-08-21 12:02:18,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:18,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169897820] [2021-08-21 12:02:18,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:18,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:18,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:18,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169897820] [2021-08-21 12:02:18,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169897820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:18,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239355145] [2021-08-21 12:02:18,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:02:18,866 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:18,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:18,867 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:18,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2021-08-21 12:02:20,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:02:20,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:20,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:02:20,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:21,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:21,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239355145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:21,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:21,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-08-21 12:02:21,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897170230] [2021-08-21 12:02:21,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:02:21,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:21,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:02:21,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:02:21,110 INFO L87 Difference]: Start difference. First operand 2200 states and 6781 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 12:02:21,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:21,351 INFO L93 Difference]: Finished difference Result 2464 states and 7241 transitions. [2021-08-21 12:02:21,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:02:21,351 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 21 [2021-08-21 12:02:21,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:21,355 INFO L225 Difference]: With dead ends: 2464 [2021-08-21 12:02:21,355 INFO L226 Difference]: Without dead ends: 2446 [2021-08-21 12:02:21,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 223.7ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:02:21,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-08-21 12:02:21,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2176. [2021-08-21 12:02:21,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.0744827586206895) internal successors, (6687), 2175 states have internal predecessors, (6687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:21,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 6687 transitions. [2021-08-21 12:02:21,382 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 6687 transitions. Word has length 21 [2021-08-21 12:02:21,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:21,382 INFO L470 AbstractCegarLoop]: Abstraction has 2176 states and 6687 transitions. [2021-08-21 12:02:21,382 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 12:02:21,382 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 6687 transitions. [2021-08-21 12:02:21,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:21,385 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:21,385 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:21,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2021-08-21 12:02:21,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-08-21 12:02:21,585 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:21,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:21,585 INFO L82 PathProgramCache]: Analyzing trace with hash -288096149, now seen corresponding path program 169 times [2021-08-21 12:02:21,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:21,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366488461] [2021-08-21 12:02:21,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:21,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:21,726 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:21,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:21,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366488461] [2021-08-21 12:02:21,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366488461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:21,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152889573] [2021-08-21 12:02:21,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:02:21,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:21,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:21,727 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:21,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2021-08-21 12:02:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:23,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:02:23,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:23,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152889573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:23,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:23,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-08-21 12:02:23,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549842859] [2021-08-21 12:02:23,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:02:23,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:23,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:02:23,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:02:23,942 INFO L87 Difference]: Start difference. First operand 2176 states and 6687 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 12:02:24,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:24,207 INFO L93 Difference]: Finished difference Result 2405 states and 7080 transitions. [2021-08-21 12:02:24,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:02:24,208 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 21 [2021-08-21 12:02:24,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:24,212 INFO L225 Difference]: With dead ends: 2405 [2021-08-21 12:02:24,212 INFO L226 Difference]: Without dead ends: 2383 [2021-08-21 12:02:24,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 250.8ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:02:24,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-08-21 12:02:24,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 2168. [2021-08-21 12:02:24,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 3.0724503922473465) internal successors, (6658), 2167 states have internal predecessors, (6658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:24,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 6658 transitions. [2021-08-21 12:02:24,238 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 6658 transitions. Word has length 21 [2021-08-21 12:02:24,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:24,238 INFO L470 AbstractCegarLoop]: Abstraction has 2168 states and 6658 transitions. [2021-08-21 12:02:24,238 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 12:02:24,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 6658 transitions. [2021-08-21 12:02:24,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:24,241 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:24,241 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:24,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2021-08-21 12:02:24,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:24,441 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:24,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:24,441 INFO L82 PathProgramCache]: Analyzing trace with hash -321695377, now seen corresponding path program 170 times [2021-08-21 12:02:24,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:24,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184168873] [2021-08-21 12:02:24,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:24,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:24,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:24,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184168873] [2021-08-21 12:02:24,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184168873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:24,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111794106] [2021-08-21 12:02:24,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:02:24,587 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:24,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:24,588 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:24,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2021-08-21 12:02:26,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:02:26,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:26,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:02:26,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:26,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111794106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:26,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:26,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-08-21 12:02:26,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648585514] [2021-08-21 12:02:26,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:02:26,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:26,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:02:26,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:02:26,855 INFO L87 Difference]: Start difference. First operand 2168 states and 6658 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 12:02:27,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:27,073 INFO L93 Difference]: Finished difference Result 2338 states and 6943 transitions. [2021-08-21 12:02:27,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:02:27,073 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 21 [2021-08-21 12:02:27,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:27,077 INFO L225 Difference]: With dead ends: 2338 [2021-08-21 12:02:27,077 INFO L226 Difference]: Without dead ends: 2331 [2021-08-21 12:02:27,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 233.4ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:02:27,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-08-21 12:02:27,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2168. [2021-08-21 12:02:27,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 3.0724503922473465) internal successors, (6658), 2167 states have internal predecessors, (6658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:27,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 6658 transitions. [2021-08-21 12:02:27,104 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 6658 transitions. Word has length 21 [2021-08-21 12:02:27,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:27,104 INFO L470 AbstractCegarLoop]: Abstraction has 2168 states and 6658 transitions. [2021-08-21 12:02:27,104 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 12:02:27,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 6658 transitions. [2021-08-21 12:02:27,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:27,106 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:27,106 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:27,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:27,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:27,307 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:27,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:27,307 INFO L82 PathProgramCache]: Analyzing trace with hash 705937345, now seen corresponding path program 171 times [2021-08-21 12:02:27,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:27,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151078687] [2021-08-21 12:02:27,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:27,307 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:27,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:27,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151078687] [2021-08-21 12:02:27,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151078687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:27,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474965996] [2021-08-21 12:02:27,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:02:27,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:27,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:27,451 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:27,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2021-08-21 12:02:29,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:02:29,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:29,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:02:29,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:29,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474965996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:29,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:29,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-08-21 12:02:29,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049743582] [2021-08-21 12:02:29,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:02:29,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:29,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:02:29,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:02:29,703 INFO L87 Difference]: Start difference. First operand 2168 states and 6658 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 12:02:29,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:29,861 INFO L93 Difference]: Finished difference Result 2327 states and 6929 transitions. [2021-08-21 12:02:29,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:02:29,861 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 21 [2021-08-21 12:02:29,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:29,864 INFO L225 Difference]: With dead ends: 2327 [2021-08-21 12:02:29,864 INFO L226 Difference]: Without dead ends: 2314 [2021-08-21 12:02:29,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 215.5ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:02:29,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-08-21 12:02:29,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2158. [2021-08-21 12:02:29,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 2157 states have (on average 3.0686138154844693) internal successors, (6619), 2157 states have internal predecessors, (6619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:29,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 6619 transitions. [2021-08-21 12:02:29,892 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 6619 transitions. Word has length 21 [2021-08-21 12:02:29,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:29,892 INFO L470 AbstractCegarLoop]: Abstraction has 2158 states and 6619 transitions. [2021-08-21 12:02:29,892 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 12:02:29,892 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 6619 transitions. [2021-08-21 12:02:29,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:29,894 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:29,894 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:29,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2021-08-21 12:02:30,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:30,095 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:30,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:30,095 INFO L82 PathProgramCache]: Analyzing trace with hash 768401063, now seen corresponding path program 172 times [2021-08-21 12:02:30,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:30,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759023831] [2021-08-21 12:02:30,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:30,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:30,240 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:30,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:30,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759023831] [2021-08-21 12:02:30,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759023831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:30,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921858851] [2021-08-21 12:02:30,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:02:30,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:30,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:30,241 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:30,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2021-08-21 12:02:32,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:02:32,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:32,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:02:32,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:32,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921858851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:32,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:32,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-08-21 12:02:32,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338344282] [2021-08-21 12:02:32,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:02:32,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:32,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:02:32,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:02:32,534 INFO L87 Difference]: Start difference. First operand 2158 states and 6619 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 12:02:32,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:32,778 INFO L93 Difference]: Finished difference Result 2518 states and 7412 transitions. [2021-08-21 12:02:32,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:02:32,779 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 21 [2021-08-21 12:02:32,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:32,783 INFO L225 Difference]: With dead ends: 2518 [2021-08-21 12:02:32,783 INFO L226 Difference]: Without dead ends: 2501 [2021-08-21 12:02:32,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 218.1ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:02:32,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2021-08-21 12:02:32,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 2261. [2021-08-21 12:02:32,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2261 states, 2260 states have (on average 3.084070796460177) internal successors, (6970), 2260 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:32,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2261 states to 2261 states and 6970 transitions. [2021-08-21 12:02:32,837 INFO L78 Accepts]: Start accepts. Automaton has 2261 states and 6970 transitions. Word has length 21 [2021-08-21 12:02:32,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:32,838 INFO L470 AbstractCegarLoop]: Abstraction has 2261 states and 6970 transitions. [2021-08-21 12:02:32,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 12:02:32,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2261 states and 6970 transitions. [2021-08-21 12:02:32,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:32,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:32,840 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:32,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2021-08-21 12:02:33,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:33,057 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:33,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:33,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1911863509, now seen corresponding path program 173 times [2021-08-21 12:02:33,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:33,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518899335] [2021-08-21 12:02:33,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:33,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:33,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:33,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518899335] [2021-08-21 12:02:33,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518899335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:33,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835113161] [2021-08-21 12:02:33,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:02:33,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:33,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:33,242 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:33,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2021-08-21 12:02:35,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:02:35,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:35,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:02:35,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:35,498 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:35,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835113161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:35,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:35,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-08-21 12:02:35,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395720531] [2021-08-21 12:02:35,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:02:35,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:35,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:02:35,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:02:35,499 INFO L87 Difference]: Start difference. First operand 2261 states and 6970 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:35,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:35,753 INFO L93 Difference]: Finished difference Result 2516 states and 7381 transitions. [2021-08-21 12:02:35,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:02:35,753 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:02:35,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:35,758 INFO L225 Difference]: With dead ends: 2516 [2021-08-21 12:02:35,758 INFO L226 Difference]: Without dead ends: 2498 [2021-08-21 12:02:35,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 228.4ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:02:35,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-08-21 12:02:35,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2230. [2021-08-21 12:02:35,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 3.0744728577837597) internal successors, (6853), 2229 states have internal predecessors, (6853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:35,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 6853 transitions. [2021-08-21 12:02:35,787 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 6853 transitions. Word has length 21 [2021-08-21 12:02:35,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:35,787 INFO L470 AbstractCegarLoop]: Abstraction has 2230 states and 6853 transitions. [2021-08-21 12:02:35,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:35,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 6853 transitions. [2021-08-21 12:02:35,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:35,789 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:35,790 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:35,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2021-08-21 12:02:35,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:35,990 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:35,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:35,990 INFO L82 PathProgramCache]: Analyzing trace with hash 303809959, now seen corresponding path program 174 times [2021-08-21 12:02:35,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:35,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744665552] [2021-08-21 12:02:35,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:35,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:36,129 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:36,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:36,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744665552] [2021-08-21 12:02:36,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744665552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:36,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491887985] [2021-08-21 12:02:36,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:02:36,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:36,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:36,130 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:36,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2021-08-21 12:02:38,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:02:38,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:38,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:02:38,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:38,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491887985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:38,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:38,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-08-21 12:02:38,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468286925] [2021-08-21 12:02:38,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:02:38,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:38,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:02:38,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:02:38,511 INFO L87 Difference]: Start difference. First operand 2230 states and 6853 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:38,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:38,779 INFO L93 Difference]: Finished difference Result 2507 states and 7296 transitions. [2021-08-21 12:02:38,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:02:38,779 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:02:38,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:38,783 INFO L225 Difference]: With dead ends: 2507 [2021-08-21 12:02:38,783 INFO L226 Difference]: Without dead ends: 2485 [2021-08-21 12:02:38,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 239.3ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:02:38,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2021-08-21 12:02:38,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 2217. [2021-08-21 12:02:38,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2216 states have (on average 3.0699458483754514) internal successors, (6803), 2216 states have internal predecessors, (6803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:38,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 6803 transitions. [2021-08-21 12:02:38,812 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 6803 transitions. Word has length 21 [2021-08-21 12:02:38,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:38,812 INFO L470 AbstractCegarLoop]: Abstraction has 2217 states and 6803 transitions. [2021-08-21 12:02:38,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:38,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 6803 transitions. [2021-08-21 12:02:38,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:38,815 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:38,815 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:38,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:39,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:39,015 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:39,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:39,015 INFO L82 PathProgramCache]: Analyzing trace with hash 270210731, now seen corresponding path program 175 times [2021-08-21 12:02:39,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:39,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979682857] [2021-08-21 12:02:39,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:39,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:39,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:39,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979682857] [2021-08-21 12:02:39,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979682857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:39,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056158484] [2021-08-21 12:02:39,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:02:39,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:39,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:39,160 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:39,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2021-08-21 12:02:41,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:41,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:02:41,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:41,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056158484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:41,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:41,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-08-21 12:02:41,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695416523] [2021-08-21 12:02:41,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:02:41,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:41,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:02:41,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:02:41,450 INFO L87 Difference]: Start difference. First operand 2217 states and 6803 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:41,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:41,737 INFO L93 Difference]: Finished difference Result 2454 states and 7183 transitions. [2021-08-21 12:02:41,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:02:41,737 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:02:41,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:41,741 INFO L225 Difference]: With dead ends: 2454 [2021-08-21 12:02:41,741 INFO L226 Difference]: Without dead ends: 2428 [2021-08-21 12:02:41,741 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 249.1ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:02:41,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-08-21 12:02:41,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2206. [2021-08-21 12:02:41,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 3.068934240362812) internal successors, (6767), 2205 states have internal predecessors, (6767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:41,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 6767 transitions. [2021-08-21 12:02:41,769 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 6767 transitions. Word has length 21 [2021-08-21 12:02:41,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:41,769 INFO L470 AbstractCegarLoop]: Abstraction has 2206 states and 6767 transitions. [2021-08-21 12:02:41,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:41,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 6767 transitions. [2021-08-21 12:02:41,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:41,772 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:41,772 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:41,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:41,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-08-21 12:02:41,973 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:41,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:41,973 INFO L82 PathProgramCache]: Analyzing trace with hash -771365337, now seen corresponding path program 176 times [2021-08-21 12:02:41,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:41,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588747202] [2021-08-21 12:02:41,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:41,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:42,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:42,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:42,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588747202] [2021-08-21 12:02:42,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588747202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:42,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141571220] [2021-08-21 12:02:42,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:02:42,147 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:42,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:42,148 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:42,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2021-08-21 12:02:44,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:02:44,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:44,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:02:44,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:44,544 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:44,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141571220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:44,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:44,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-08-21 12:02:44,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374904135] [2021-08-21 12:02:44,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:02:44,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:44,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:02:44,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:02:44,545 INFO L87 Difference]: Start difference. First operand 2206 states and 6767 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:44,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:44,841 INFO L93 Difference]: Finished difference Result 2375 states and 7031 transitions. [2021-08-21 12:02:44,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:02:44,841 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:02:44,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:44,845 INFO L225 Difference]: With dead ends: 2375 [2021-08-21 12:02:44,845 INFO L226 Difference]: Without dead ends: 2368 [2021-08-21 12:02:44,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 247.6ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:02:44,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2021-08-21 12:02:44,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 2208. [2021-08-21 12:02:44,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 3.067512460353421) internal successors, (6770), 2207 states have internal predecessors, (6770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:44,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 6770 transitions. [2021-08-21 12:02:44,873 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 6770 transitions. Word has length 21 [2021-08-21 12:02:44,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:44,873 INFO L470 AbstractCegarLoop]: Abstraction has 2208 states and 6770 transitions. [2021-08-21 12:02:44,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:44,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 6770 transitions. [2021-08-21 12:02:44,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:44,876 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:44,876 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:44,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2021-08-21 12:02:45,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-08-21 12:02:45,076 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:45,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:45,077 INFO L82 PathProgramCache]: Analyzing trace with hash -2111325563, now seen corresponding path program 177 times [2021-08-21 12:02:45,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:45,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436022537] [2021-08-21 12:02:45,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:45,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:45,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:45,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436022537] [2021-08-21 12:02:45,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436022537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:45,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406595344] [2021-08-21 12:02:45,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:02:45,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:45,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:45,218 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:45,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2021-08-21 12:02:47,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:02:47,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:47,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:02:47,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:47,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406595344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:47,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:47,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-08-21 12:02:47,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602367438] [2021-08-21 12:02:47,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:02:47,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:47,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:02:47,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:02:47,608 INFO L87 Difference]: Start difference. First operand 2208 states and 6770 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 12:02:47,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:47,778 INFO L93 Difference]: Finished difference Result 2298 states and 6916 transitions. [2021-08-21 12:02:47,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:02:47,778 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 21 [2021-08-21 12:02:47,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:47,781 INFO L225 Difference]: With dead ends: 2298 [2021-08-21 12:02:47,781 INFO L226 Difference]: Without dead ends: 2285 [2021-08-21 12:02:47,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 221.7ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:02:47,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-08-21 12:02:47,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2196. [2021-08-21 12:02:47,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 3.0674259681093394) internal successors, (6733), 2195 states have internal predecessors, (6733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:47,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 6733 transitions. [2021-08-21 12:02:47,808 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 6733 transitions. Word has length 21 [2021-08-21 12:02:47,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:47,808 INFO L470 AbstractCegarLoop]: Abstraction has 2196 states and 6733 transitions. [2021-08-21 12:02:47,808 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 12:02:47,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 6733 transitions. [2021-08-21 12:02:47,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:47,810 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:47,810 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:47,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:48,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-08-21 12:02:48,012 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:48,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:48,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1937621227, now seen corresponding path program 178 times [2021-08-21 12:02:48,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:48,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90066813] [2021-08-21 12:02:48,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:48,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:48,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:48,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:48,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90066813] [2021-08-21 12:02:48,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90066813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:48,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375983998] [2021-08-21 12:02:48,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:02:48,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:48,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:48,178 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:48,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2021-08-21 12:02:50,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:02:50,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:50,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:02:50,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:50,537 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:50,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375983998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:50,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:50,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-08-21 12:02:50,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955916550] [2021-08-21 12:02:50,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:02:50,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:50,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:02:50,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:02:50,538 INFO L87 Difference]: Start difference. First operand 2196 states and 6733 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 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 12:02:50,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:50,785 INFO L93 Difference]: Finished difference Result 2566 states and 7558 transitions. [2021-08-21 12:02:50,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:02:50,785 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 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 21 [2021-08-21 12:02:50,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:50,788 INFO L225 Difference]: With dead ends: 2566 [2021-08-21 12:02:50,788 INFO L226 Difference]: Without dead ends: 2549 [2021-08-21 12:02:50,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 224.0ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:02:50,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2021-08-21 12:02:50,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 2334. [2021-08-21 12:02:50,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2333 states have (on average 3.072438919845692) internal successors, (7168), 2333 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:50,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 7168 transitions. [2021-08-21 12:02:50,818 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 7168 transitions. Word has length 21 [2021-08-21 12:02:50,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:50,818 INFO L470 AbstractCegarLoop]: Abstraction has 2334 states and 7168 transitions. [2021-08-21 12:02:50,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 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 12:02:50,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 7168 transitions. [2021-08-21 12:02:50,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:50,821 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:50,821 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:50,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2021-08-21 12:02:51,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-08-21 12:02:51,021 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:51,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:51,022 INFO L82 PathProgramCache]: Analyzing trace with hash -742643345, now seen corresponding path program 179 times [2021-08-21 12:02:51,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:51,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852207251] [2021-08-21 12:02:51,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:51,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:51,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:51,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852207251] [2021-08-21 12:02:51,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852207251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:51,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155521928] [2021-08-21 12:02:51,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:02:51,179 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:51,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:51,180 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:51,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2021-08-21 12:02:53,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:02:53,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:53,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:02:53,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:53,617 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:53,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155521928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:53,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:53,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-08-21 12:02:53,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927147474] [2021-08-21 12:02:53,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:02:53,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:53,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:02:53,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:02:53,618 INFO L87 Difference]: Start difference. First operand 2334 states and 7168 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:53,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:53,867 INFO L93 Difference]: Finished difference Result 2564 states and 7531 transitions. [2021-08-21 12:02:53,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:02:53,867 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:02:53,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:53,872 INFO L225 Difference]: With dead ends: 2564 [2021-08-21 12:02:53,872 INFO L226 Difference]: Without dead ends: 2548 [2021-08-21 12:02:53,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 260.5ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:02:53,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-08-21 12:02:53,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 2315. [2021-08-21 12:02:53,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2315 states, 2314 states have (on average 3.066983578219533) internal successors, (7097), 2314 states have internal predecessors, (7097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:53,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2315 states to 2315 states and 7097 transitions. [2021-08-21 12:02:53,902 INFO L78 Accepts]: Start accepts. Automaton has 2315 states and 7097 transitions. Word has length 21 [2021-08-21 12:02:53,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:53,902 INFO L470 AbstractCegarLoop]: Abstraction has 2315 states and 7097 transitions. [2021-08-21 12:02:53,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:53,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2315 states and 7097 transitions. [2021-08-21 12:02:53,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:53,905 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:53,905 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:53,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2021-08-21 12:02:54,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:54,105 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:54,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:54,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1473030123, now seen corresponding path program 180 times [2021-08-21 12:02:54,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:54,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248889062] [2021-08-21 12:02:54,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:54,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:54,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:54,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248889062] [2021-08-21 12:02:54,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248889062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:54,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658362234] [2021-08-21 12:02:54,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:02:54,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:54,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:54,249 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:54,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2021-08-21 12:02:56,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:02:56,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:56,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:02:56,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:56,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658362234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:56,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:56,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-08-21 12:02:56,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288417980] [2021-08-21 12:02:56,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:02:56,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:56,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:02:56,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:02:56,654 INFO L87 Difference]: Start difference. First operand 2315 states and 7097 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 12:02:56,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:56,925 INFO L93 Difference]: Finished difference Result 2571 states and 7503 transitions. [2021-08-21 12:02:56,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:02:56,925 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 21 [2021-08-21 12:02:56,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:56,929 INFO L225 Difference]: With dead ends: 2571 [2021-08-21 12:02:56,929 INFO L226 Difference]: Without dead ends: 2553 [2021-08-21 12:02:56,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 235.8ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:02:56,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-08-21 12:02:56,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2295. [2021-08-21 12:02:56,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 2294 states have (on average 3.0610287707061903) internal successors, (7022), 2294 states have internal predecessors, (7022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:56,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 7022 transitions. [2021-08-21 12:02:56,957 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 7022 transitions. Word has length 21 [2021-08-21 12:02:56,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:56,958 INFO L470 AbstractCegarLoop]: Abstraction has 2295 states and 7022 transitions. [2021-08-21 12:02:56,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 12:02:56,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 7022 transitions. [2021-08-21 12:02:56,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:56,960 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:56,960 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:56,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:57,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:57,161 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:57,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:57,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1439430895, now seen corresponding path program 181 times [2021-08-21 12:02:57,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:57,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000231642] [2021-08-21 12:02:57,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:57,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:57,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:57,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000231642] [2021-08-21 12:02:57,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000231642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:57,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093996429] [2021-08-21 12:02:57,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:02:57,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:57,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:57,311 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:57,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2021-08-21 12:02:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:59,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:02:59,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:59,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093996429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:59,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:59,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-08-21 12:02:59,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086001635] [2021-08-21 12:02:59,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:02:59,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:59,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:02:59,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:02:59,721 INFO L87 Difference]: Start difference. First operand 2295 states and 7022 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 12:03:00,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:00,054 INFO L93 Difference]: Finished difference Result 2576 states and 7464 transitions. [2021-08-21 12:03:00,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:03:00,054 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 21 [2021-08-21 12:03:00,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:00,058 INFO L225 Difference]: With dead ends: 2576 [2021-08-21 12:03:00,058 INFO L226 Difference]: Without dead ends: 2556 [2021-08-21 12:03:00,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 257.2ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:03:00,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-08-21 12:03:00,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2276. [2021-08-21 12:03:00,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 3.0567032967032968) internal successors, (6954), 2275 states have internal predecessors, (6954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:00,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 6954 transitions. [2021-08-21 12:03:00,086 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 6954 transitions. Word has length 21 [2021-08-21 12:03:00,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:00,086 INFO L470 AbstractCegarLoop]: Abstraction has 2276 states and 6954 transitions. [2021-08-21 12:03:00,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 12:03:00,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 6954 transitions. [2021-08-21 12:03:00,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:03:00,088 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:00,088 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:00,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2021-08-21 12:03:00,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:00,289 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:00,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:00,289 INFO L82 PathProgramCache]: Analyzing trace with hash 397854827, now seen corresponding path program 182 times [2021-08-21 12:03:00,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:00,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409849346] [2021-08-21 12:03:00,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:00,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:00,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:00,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:00,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:00,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409849346] [2021-08-21 12:03:00,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409849346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:00,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476905209] [2021-08-21 12:03:00,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:03:00,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:00,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:00,469 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:00,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2021-08-21 12:03:02,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:03:02,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:02,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:03:02,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:02,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476905209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:02,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:02,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-08-21 12:03:02,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964247218] [2021-08-21 12:03:02,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:03:02,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:02,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:03:02,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:03:02,958 INFO L87 Difference]: Start difference. First operand 2276 states and 6954 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 12:03:03,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:03,318 INFO L93 Difference]: Finished difference Result 2488 states and 7287 transitions. [2021-08-21 12:03:03,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:03:03,318 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 21 [2021-08-21 12:03:03,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:03,322 INFO L225 Difference]: With dead ends: 2488 [2021-08-21 12:03:03,322 INFO L226 Difference]: Without dead ends: 2466 [2021-08-21 12:03:03,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 297.4ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:03:03,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2021-08-21 12:03:03,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 2256. [2021-08-21 12:03:03,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 3.0594235033259425) internal successors, (6899), 2255 states have internal predecessors, (6899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:03,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6899 transitions. [2021-08-21 12:03:03,350 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6899 transitions. Word has length 21 [2021-08-21 12:03:03,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:03,350 INFO L470 AbstractCegarLoop]: Abstraction has 2256 states and 6899 transitions. [2021-08-21 12:03:03,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 12:03:03,350 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6899 transitions. [2021-08-21 12:03:03,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:03:03,353 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:03,353 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:03,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2021-08-21 12:03:03,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:03,553 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:03,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:03,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1826232209, now seen corresponding path program 183 times [2021-08-21 12:03:03,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:03,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836383504] [2021-08-21 12:03:03,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:03,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:03,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:03,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:03,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836383504] [2021-08-21 12:03:03,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836383504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:03,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002555040] [2021-08-21 12:03:03,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:03:03,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:03,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:03,727 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:03,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2021-08-21 12:03:05,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:03:05,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:05,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:03:05,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:06,216 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:06,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002555040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:06,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:06,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-08-21 12:03:06,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987265026] [2021-08-21 12:03:06,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:03:06,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:06,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:03:06,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:03:06,217 INFO L87 Difference]: Start difference. First operand 2256 states and 6899 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 12:03:06,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:06,525 INFO L93 Difference]: Finished difference Result 2408 states and 7132 transitions. [2021-08-21 12:03:06,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:03:06,525 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 21 [2021-08-21 12:03:06,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:06,529 INFO L225 Difference]: With dead ends: 2408 [2021-08-21 12:03:06,529 INFO L226 Difference]: Without dead ends: 2401 [2021-08-21 12:03:06,529 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 265.4ms TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:03:06,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2021-08-21 12:03:06,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 2266. [2021-08-21 12:03:06,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2266 states, 2265 states have (on average 3.0525386313465783) internal successors, (6914), 2265 states have internal predecessors, (6914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:06,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2266 states to 2266 states and 6914 transitions. [2021-08-21 12:03:06,583 INFO L78 Accepts]: Start accepts. Automaton has 2266 states and 6914 transitions. Word has length 21 [2021-08-21 12:03:06,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:06,583 INFO L470 AbstractCegarLoop]: Abstraction has 2266 states and 6914 transitions. [2021-08-21 12:03:06,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 12:03:06,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2266 states and 6914 transitions. [2021-08-21 12:03:06,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:03:06,586 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:06,586 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:06,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:06,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:06,786 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:06,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:06,786 INFO L82 PathProgramCache]: Analyzing trace with hash 176382699, now seen corresponding path program 184 times [2021-08-21 12:03:06,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:06,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304852896] [2021-08-21 12:03:06,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:06,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:06,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:06,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304852896] [2021-08-21 12:03:06,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304852896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:06,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702935270] [2021-08-21 12:03:06,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:03:06,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:06,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:06,947 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:06,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2021-08-21 12:03:09,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:03:09,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:09,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:03:09,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:09,445 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:09,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702935270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:09,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:09,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2021-08-21 12:03:09,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712049256] [2021-08-21 12:03:09,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:03:09,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:09,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:03:09,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:03:09,446 INFO L87 Difference]: Start difference. First operand 2266 states and 6914 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 12:03:09,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:09,635 INFO L93 Difference]: Finished difference Result 2482 states and 7361 transitions. [2021-08-21 12:03:09,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:03:09,636 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 21 [2021-08-21 12:03:09,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:09,640 INFO L225 Difference]: With dead ends: 2482 [2021-08-21 12:03:09,640 INFO L226 Difference]: Without dead ends: 2472 [2021-08-21 12:03:09,640 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 223.0ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:03:09,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-08-21 12:03:09,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2293. [2021-08-21 12:03:09,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2292 states have (on average 3.0584642233856894) internal successors, (7010), 2292 states have internal predecessors, (7010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:09,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 7010 transitions. [2021-08-21 12:03:09,670 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 7010 transitions. Word has length 21 [2021-08-21 12:03:09,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:09,670 INFO L470 AbstractCegarLoop]: Abstraction has 2293 states and 7010 transitions. [2021-08-21 12:03:09,670 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 12:03:09,670 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 7010 transitions. [2021-08-21 12:03:09,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:03:09,673 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:09,673 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:09,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2021-08-21 12:03:09,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:09,873 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:09,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:09,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1791085423, now seen corresponding path program 185 times [2021-08-21 12:03:09,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:09,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026097030] [2021-08-21 12:03:09,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:09,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:10,033 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:10,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:10,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026097030] [2021-08-21 12:03:10,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026097030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:10,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510251055] [2021-08-21 12:03:10,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:03:10,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:10,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:10,034 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:10,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2021-08-21 12:03:12,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:03:12,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:12,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:03:12,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:12,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510251055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:12,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:12,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2021-08-21 12:03:12,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119027667] [2021-08-21 12:03:12,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:03:12,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:12,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:03:12,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:03:12,546 INFO L87 Difference]: Start difference. First operand 2293 states and 7010 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 12:03:12,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:12,713 INFO L93 Difference]: Finished difference Result 2464 states and 7323 transitions. [2021-08-21 12:03:12,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:03:12,713 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 21 [2021-08-21 12:03:12,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:12,717 INFO L225 Difference]: With dead ends: 2464 [2021-08-21 12:03:12,717 INFO L226 Difference]: Without dead ends: 2457 [2021-08-21 12:03:12,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 203.5ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:03:12,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-08-21 12:03:12,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2291. [2021-08-21 12:03:12,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 3.05764192139738) internal successors, (7002), 2290 states have internal predecessors, (7002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:12,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 7002 transitions. [2021-08-21 12:03:12,746 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 7002 transitions. Word has length 21 [2021-08-21 12:03:12,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:12,746 INFO L470 AbstractCegarLoop]: Abstraction has 2291 states and 7002 transitions. [2021-08-21 12:03:12,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 12:03:12,746 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 7002 transitions. [2021-08-21 12:03:12,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:03:12,748 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:12,748 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:12,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2021-08-21 12:03:12,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:12,949 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:12,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:12,949 INFO L82 PathProgramCache]: Analyzing trace with hash 747837505, now seen corresponding path program 186 times [2021-08-21 12:03:12,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:12,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423964959] [2021-08-21 12:03:12,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:12,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:13,097 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:13,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:13,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423964959] [2021-08-21 12:03:13,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423964959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:13,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796059822] [2021-08-21 12:03:13,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:03:13,097 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:13,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:13,098 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:13,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2021-08-21 12:03:15,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:03:15,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:15,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:03:15,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:15,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796059822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:15,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:15,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-08-21 12:03:15,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689973451] [2021-08-21 12:03:15,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:03:15,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:15,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:03:15,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:03:15,700 INFO L87 Difference]: Start difference. First operand 2291 states and 7002 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:15,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:15,862 INFO L93 Difference]: Finished difference Result 2417 states and 7217 transitions. [2021-08-21 12:03:15,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:03:15,863 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:03:15,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:15,866 INFO L225 Difference]: With dead ends: 2417 [2021-08-21 12:03:15,866 INFO L226 Difference]: Without dead ends: 2410 [2021-08-21 12:03:15,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 228.9ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:03:15,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-08-21 12:03:15,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 2290. [2021-08-21 12:03:15,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2290 states, 2289 states have (on average 3.0576671035386633) internal successors, (6999), 2289 states have internal predecessors, (6999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:15,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2290 states to 2290 states and 6999 transitions. [2021-08-21 12:03:15,894 INFO L78 Accepts]: Start accepts. Automaton has 2290 states and 6999 transitions. Word has length 21 [2021-08-21 12:03:15,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:15,894 INFO L470 AbstractCegarLoop]: Abstraction has 2290 states and 6999 transitions. [2021-08-21 12:03:15,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:15,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2290 states and 6999 transitions. [2021-08-21 12:03:15,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:03:15,897 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:15,897 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:15,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:16,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-08-21 12:03:16,098 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:16,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:16,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1412563179, now seen corresponding path program 187 times [2021-08-21 12:03:16,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:16,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580181393] [2021-08-21 12:03:16,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:16,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:16,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:16,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:16,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:16,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580181393] [2021-08-21 12:03:16,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580181393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:16,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753443992] [2021-08-21 12:03:16,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:03:16,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:16,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:16,276 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:16,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2021-08-21 12:03:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:18,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:03:18,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:18,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753443992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:18,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:18,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-08-21 12:03:18,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314660317] [2021-08-21 12:03:18,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:03:18,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:18,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:03:18,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:03:18,925 INFO L87 Difference]: Start difference. First operand 2290 states and 6999 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 12:03:19,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:19,121 INFO L93 Difference]: Finished difference Result 2563 states and 7583 transitions. [2021-08-21 12:03:19,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:03:19,122 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 21 [2021-08-21 12:03:19,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:19,125 INFO L225 Difference]: With dead ends: 2563 [2021-08-21 12:03:19,125 INFO L226 Difference]: Without dead ends: 2553 [2021-08-21 12:03:19,126 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 218.1ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:03:19,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-08-21 12:03:19,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2331. [2021-08-21 12:03:19,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 3.06480686695279) internal successors, (7141), 2330 states have internal predecessors, (7141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:19,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 7141 transitions. [2021-08-21 12:03:19,154 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 7141 transitions. Word has length 21 [2021-08-21 12:03:19,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:19,154 INFO L470 AbstractCegarLoop]: Abstraction has 2331 states and 7141 transitions. [2021-08-21 12:03:19,154 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 12:03:19,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 7141 transitions. [2021-08-21 12:03:19,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:03:19,157 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:19,157 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:19,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:19,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-08-21 12:03:19,358 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:19,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:19,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1267701393, now seen corresponding path program 188 times [2021-08-21 12:03:19,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:19,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015359485] [2021-08-21 12:03:19,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:19,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:19,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:19,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015359485] [2021-08-21 12:03:19,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015359485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:19,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064005820] [2021-08-21 12:03:19,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:03:19,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:19,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:19,505 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:19,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2021-08-21 12:03:21,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:03:21,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:21,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:03:21,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:22,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064005820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:22,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:22,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-08-21 12:03:22,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924081297] [2021-08-21 12:03:22,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:03:22,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:22,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:03:22,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:03:22,090 INFO L87 Difference]: Start difference. First operand 2331 states and 7141 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:22,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:22,287 INFO L93 Difference]: Finished difference Result 2544 states and 7541 transitions. [2021-08-21 12:03:22,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:03:22,288 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:03:22,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:22,291 INFO L225 Difference]: With dead ends: 2544 [2021-08-21 12:03:22,291 INFO L226 Difference]: Without dead ends: 2537 [2021-08-21 12:03:22,291 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 204.4ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:03:22,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2021-08-21 12:03:22,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 2328. [2021-08-21 12:03:22,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 3.063601203266008) internal successors, (7129), 2327 states have internal predecessors, (7129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:22,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 7129 transitions. [2021-08-21 12:03:22,319 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 7129 transitions. Word has length 21 [2021-08-21 12:03:22,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:22,319 INFO L470 AbstractCegarLoop]: Abstraction has 2328 states and 7129 transitions. [2021-08-21 12:03:22,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:22,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 7129 transitions. [2021-08-21 12:03:22,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:03:22,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:22,322 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:22,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2021-08-21 12:03:22,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:22,522 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:22,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:22,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1984017985, now seen corresponding path program 189 times [2021-08-21 12:03:22,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:22,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975426020] [2021-08-21 12:03:22,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:22,523 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:22,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:22,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:22,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975426020] [2021-08-21 12:03:22,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975426020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:22,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322315188] [2021-08-21 12:03:22,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:03:22,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:22,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:22,693 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:22,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2021-08-21 12:03:25,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:03:25,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:25,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:03:25,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:25,320 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:25,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322315188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:25,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:25,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-08-21 12:03:25,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395731771] [2021-08-21 12:03:25,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:03:25,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:25,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:03:25,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:03:25,321 INFO L87 Difference]: Start difference. First operand 2328 states and 7129 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 12:03:25,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:25,525 INFO L93 Difference]: Finished difference Result 2523 states and 7485 transitions. [2021-08-21 12:03:25,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:03:25,526 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 21 [2021-08-21 12:03:25,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:25,530 INFO L225 Difference]: With dead ends: 2523 [2021-08-21 12:03:25,530 INFO L226 Difference]: Without dead ends: 2510 [2021-08-21 12:03:25,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 246.7ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:03:25,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2021-08-21 12:03:25,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 2329. [2021-08-21 12:03:25,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2329 states, 2328 states have (on average 3.0614261168384878) internal successors, (7127), 2328 states have internal predecessors, (7127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:25,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 7127 transitions. [2021-08-21 12:03:25,558 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 7127 transitions. Word has length 21 [2021-08-21 12:03:25,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:25,558 INFO L470 AbstractCegarLoop]: Abstraction has 2329 states and 7127 transitions. [2021-08-21 12:03:25,558 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 12:03:25,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 7127 transitions. [2021-08-21 12:03:25,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:03:25,561 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:25,561 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:25,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2021-08-21 12:03:25,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-08-21 12:03:25,761 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:25,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:25,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1775719509, now seen corresponding path program 190 times [2021-08-21 12:03:25,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:25,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100385185] [2021-08-21 12:03:25,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:25,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:25,933 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:25,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:25,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100385185] [2021-08-21 12:03:25,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100385185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:25,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954202975] [2021-08-21 12:03:25,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:03:25,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:25,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:25,934 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:25,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2021-08-21 12:03:28,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:03:28,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:28,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:03:28,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:28,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954202975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:28,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:28,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-08-21 12:03:28,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448734884] [2021-08-21 12:03:28,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:03:28,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:28,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:03:28,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:03:28,589 INFO L87 Difference]: Start difference. First operand 2329 states and 7127 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 12:03:28,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:28,827 INFO L93 Difference]: Finished difference Result 2467 states and 7353 transitions. [2021-08-21 12:03:28,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:03:28,827 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 21 [2021-08-21 12:03:28,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:28,831 INFO L225 Difference]: With dead ends: 2467 [2021-08-21 12:03:28,831 INFO L226 Difference]: Without dead ends: 2460 [2021-08-21 12:03:28,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 249.2ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:03:28,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-08-21 12:03:28,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2327. [2021-08-21 12:03:28,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2327 states, 2326 states have (on average 3.0614789337919173) internal successors, (7121), 2326 states have internal predecessors, (7121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:28,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2327 states to 2327 states and 7121 transitions. [2021-08-21 12:03:28,859 INFO L78 Accepts]: Start accepts. Automaton has 2327 states and 7121 transitions. Word has length 21 [2021-08-21 12:03:28,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:28,859 INFO L470 AbstractCegarLoop]: Abstraction has 2327 states and 7121 transitions. [2021-08-21 12:03:28,859 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 12:03:28,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2327 states and 7121 transitions. [2021-08-21 12:03:28,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:03:28,862 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:28,862 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:28,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:29,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-08-21 12:03:29,062 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:29,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:29,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1300338723, now seen corresponding path program 191 times [2021-08-21 12:03:29,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:29,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690358275] [2021-08-21 12:03:29,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:29,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:29,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:29,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690358275] [2021-08-21 12:03:29,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690358275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:29,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125293554] [2021-08-21 12:03:29,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:03:29,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:29,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:29,211 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:29,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2021-08-21 12:03:31,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:03:31,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:31,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:03:31,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:31,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125293554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:31,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:31,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-08-21 12:03:31,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866203299] [2021-08-21 12:03:31,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:03:31,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:31,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:03:31,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:03:31,868 INFO L87 Difference]: Start difference. First operand 2327 states and 7121 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 12:03:32,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:32,070 INFO L93 Difference]: Finished difference Result 2438 states and 7310 transitions. [2021-08-21 12:03:32,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:03:32,070 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 21 [2021-08-21 12:03:32,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:32,074 INFO L225 Difference]: With dead ends: 2438 [2021-08-21 12:03:32,074 INFO L226 Difference]: Without dead ends: 2422 [2021-08-21 12:03:32,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 234.9ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:03:32,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-08-21 12:03:32,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 2317. [2021-08-21 12:03:32,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 3.0617443868739205) internal successors, (7091), 2316 states have internal predecessors, (7091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:32,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 7091 transitions. [2021-08-21 12:03:32,101 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 7091 transitions. Word has length 21 [2021-08-21 12:03:32,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:32,101 INFO L470 AbstractCegarLoop]: Abstraction has 2317 states and 7091 transitions. [2021-08-21 12:03:32,101 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 12:03:32,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 7091 transitions. [2021-08-21 12:03:32,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:03:32,104 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:32,104 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:32,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:32,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-08-21 12:03:32,304 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:32,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:32,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1079452395, now seen corresponding path program 192 times [2021-08-21 12:03:32,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:32,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268944862] [2021-08-21 12:03:32,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:32,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:32,455 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:32,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:32,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268944862] [2021-08-21 12:03:32,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268944862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:32,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887662350] [2021-08-21 12:03:32,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:03:32,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:32,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:32,457 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:32,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2021-08-21 12:03:34,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:03:34,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:34,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:03:34,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:35,118 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:35,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887662350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:35,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:35,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-08-21 12:03:35,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778291271] [2021-08-21 12:03:35,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:03:35,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:35,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:03:35,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:03:35,119 INFO L87 Difference]: Start difference. First operand 2317 states and 7091 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:35,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:35,322 INFO L93 Difference]: Finished difference Result 2637 states and 7762 transitions. [2021-08-21 12:03:35,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:03:35,322 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:03:35,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:35,326 INFO L225 Difference]: With dead ends: 2637 [2021-08-21 12:03:35,326 INFO L226 Difference]: Without dead ends: 2627 [2021-08-21 12:03:35,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 201.8ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:03:35,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2627 states. [2021-08-21 12:03:35,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2627 to 2365. [2021-08-21 12:03:35,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2364 states have (on average 3.0697969543147208) internal successors, (7257), 2364 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:35,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 7257 transitions. [2021-08-21 12:03:35,356 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 7257 transitions. Word has length 21 [2021-08-21 12:03:35,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:35,356 INFO L470 AbstractCegarLoop]: Abstraction has 2365 states and 7257 transitions. [2021-08-21 12:03:35,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:35,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 7257 transitions. [2021-08-21 12:03:35,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:03:35,359 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:35,359 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:35,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:35,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-08-21 12:03:35,560 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:35,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:35,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1600812177, now seen corresponding path program 193 times [2021-08-21 12:03:35,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:35,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116057712] [2021-08-21 12:03:35,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:35,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:35,723 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:35,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:35,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116057712] [2021-08-21 12:03:35,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116057712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:35,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083339375] [2021-08-21 12:03:35,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:03:35,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:35,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:35,725 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:35,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2021-08-21 12:03:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:38,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:03:38,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:38,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083339375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:38,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:38,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-08-21 12:03:38,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635942516] [2021-08-21 12:03:38,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:03:38,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:38,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:03:38,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:03:38,461 INFO L87 Difference]: Start difference. First operand 2365 states and 7257 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 12:03:38,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:38,648 INFO L93 Difference]: Finished difference Result 2621 states and 7728 transitions. [2021-08-21 12:03:38,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:03:38,648 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 21 [2021-08-21 12:03:38,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:38,653 INFO L225 Difference]: With dead ends: 2621 [2021-08-21 12:03:38,653 INFO L226 Difference]: Without dead ends: 2614 [2021-08-21 12:03:38,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:03:38,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2021-08-21 12:03:38,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 2358. [2021-08-21 12:03:38,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2358 states, 2357 states have (on average 3.068731438268986) internal successors, (7233), 2357 states have internal predecessors, (7233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:38,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2358 states to 2358 states and 7233 transitions. [2021-08-21 12:03:38,685 INFO L78 Accepts]: Start accepts. Automaton has 2358 states and 7233 transitions. Word has length 21 [2021-08-21 12:03:38,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:38,685 INFO L470 AbstractCegarLoop]: Abstraction has 2358 states and 7233 transitions. [2021-08-21 12:03:38,685 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 12:03:38,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2358 states and 7233 transitions. [2021-08-21 12:03:38,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:03:38,688 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:38,688 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:38,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2021-08-21 12:03:38,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:38,888 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:38,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:38,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1650907201, now seen corresponding path program 194 times [2021-08-21 12:03:38,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:38,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013813869] [2021-08-21 12:03:38,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:38,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:39,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:39,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013813869] [2021-08-21 12:03:39,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013813869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:39,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41590158] [2021-08-21 12:03:39,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:03:39,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:39,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:39,030 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:39,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2021-08-21 12:03:41,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:03:41,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:41,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:03:41,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:41,766 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:41,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41590158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:41,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:41,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-08-21 12:03:41,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20448616] [2021-08-21 12:03:41,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:03:41,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:41,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:03:41,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:03:41,767 INFO L87 Difference]: Start difference. First operand 2358 states and 7233 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 12:03:41,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:41,981 INFO L93 Difference]: Finished difference Result 2635 states and 7737 transitions. [2021-08-21 12:03:41,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:03:41,981 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 21 [2021-08-21 12:03:41,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:41,985 INFO L225 Difference]: With dead ends: 2635 [2021-08-21 12:03:41,985 INFO L226 Difference]: Without dead ends: 2622 [2021-08-21 12:03:41,985 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 216.9ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:03:41,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-08-21 12:03:42,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 2355. [2021-08-21 12:03:42,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2354 states have (on average 3.0671197960917587) internal successors, (7220), 2354 states have internal predecessors, (7220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:42,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 7220 transitions. [2021-08-21 12:03:42,014 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 7220 transitions. Word has length 21 [2021-08-21 12:03:42,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:42,014 INFO L470 AbstractCegarLoop]: Abstraction has 2355 states and 7220 transitions. [2021-08-21 12:03:42,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 12:03:42,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 7220 transitions. [2021-08-21 12:03:42,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:03:42,017 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:42,017 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:42,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:42,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:42,218 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:42,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:42,218 INFO L82 PathProgramCache]: Analyzing trace with hash -2108830293, now seen corresponding path program 195 times [2021-08-21 12:03:42,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:42,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182518386] [2021-08-21 12:03:42,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:42,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:42,365 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:42,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:42,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182518386] [2021-08-21 12:03:42,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182518386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:42,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440708336] [2021-08-21 12:03:42,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:03:42,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:42,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:42,366 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:42,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2021-08-21 12:03:44,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:03:44,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:44,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:03:44,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:45,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440708336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:45,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:45,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-08-21 12:03:45,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017420684] [2021-08-21 12:03:45,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:03:45,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:45,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:03:45,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:03:45,103 INFO L87 Difference]: Start difference. First operand 2355 states and 7220 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 12:03:45,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:45,373 INFO L93 Difference]: Finished difference Result 2598 states and 7655 transitions. [2021-08-21 12:03:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:03:45,373 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 21 [2021-08-21 12:03:45,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:45,378 INFO L225 Difference]: With dead ends: 2598 [2021-08-21 12:03:45,378 INFO L226 Difference]: Without dead ends: 2582 [2021-08-21 12:03:45,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 238.6ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:03:45,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2021-08-21 12:03:45,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 2352. [2021-08-21 12:03:45,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 3.0659293917481922) internal successors, (7208), 2351 states have internal predecessors, (7208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:45,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 7208 transitions. [2021-08-21 12:03:45,407 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 7208 transitions. Word has length 21 [2021-08-21 12:03:45,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:45,407 INFO L470 AbstractCegarLoop]: Abstraction has 2352 states and 7208 transitions. [2021-08-21 12:03:45,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 12:03:45,407 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 7208 transitions. [2021-08-21 12:03:45,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:03:45,410 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:45,410 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:45,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2021-08-21 12:03:45,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:45,611 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:45,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:45,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1598391681, now seen corresponding path program 196 times [2021-08-21 12:03:45,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:45,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617017138] [2021-08-21 12:03:45,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:45,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:45,792 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:45,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:45,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617017138] [2021-08-21 12:03:45,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617017138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:45,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984601612] [2021-08-21 12:03:45,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:03:45,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:45,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:45,800 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:45,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2021-08-21 12:03:48,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:03:48,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:48,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:03:48,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:48,559 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:48,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984601612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:48,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:48,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-08-21 12:03:48,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36256968] [2021-08-21 12:03:48,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:03:48,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:48,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:03:48,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:03:48,560 INFO L87 Difference]: Start difference. First operand 2352 states and 7208 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 12:03:48,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:48,801 INFO L93 Difference]: Finished difference Result 2537 states and 7524 transitions. [2021-08-21 12:03:48,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:03:48,801 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 21 [2021-08-21 12:03:48,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:48,805 INFO L225 Difference]: With dead ends: 2537 [2021-08-21 12:03:48,805 INFO L226 Difference]: Without dead ends: 2530 [2021-08-21 12:03:48,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 239.4ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:03:48,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-08-21 12:03:48,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2349. [2021-08-21 12:03:48,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2348 states have (on average 3.066013628620102) internal successors, (7199), 2348 states have internal predecessors, (7199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 7199 transitions. [2021-08-21 12:03:48,833 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 7199 transitions. Word has length 21 [2021-08-21 12:03:48,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:48,833 INFO L470 AbstractCegarLoop]: Abstraction has 2349 states and 7199 transitions. [2021-08-21 12:03:48,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 12:03:48,833 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 7199 transitions. [2021-08-21 12:03:48,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:03:48,836 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:48,836 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:48,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2021-08-21 12:03:49,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:49,036 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:49,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:49,037 INFO L82 PathProgramCache]: Analyzing trace with hash -252562425, now seen corresponding path program 197 times [2021-08-21 12:03:49,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:49,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886675238] [2021-08-21 12:03:49,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:49,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:49,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:49,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886675238] [2021-08-21 12:03:49,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886675238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:49,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225694957] [2021-08-21 12:03:49,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:03:49,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:49,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:49,112 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:49,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2021-08-21 12:03:51,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:03:51,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:51,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:03:51,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:51,749 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:51,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225694957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:51,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:51,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-08-21 12:03:51,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704656712] [2021-08-21 12:03:51,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:03:51,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:51,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:03:51,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:03:51,749 INFO L87 Difference]: Start difference. First operand 2349 states and 7199 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:51,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:51,874 INFO L93 Difference]: Finished difference Result 3357 states and 10057 transitions. [2021-08-21 12:03:51,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:03:51,875 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:03:51,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:51,879 INFO L225 Difference]: With dead ends: 3357 [2021-08-21 12:03:51,879 INFO L226 Difference]: Without dead ends: 3337 [2021-08-21 12:03:51,879 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 164.8ms TimeCoverageRelationStatistics Valid=225, Invalid=645, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:03:51,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3337 states. [2021-08-21 12:03:51,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3337 to 2344. [2021-08-21 12:03:51,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2343 states have (on average 3.0682885189927442) internal successors, (7189), 2343 states have internal predecessors, (7189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:51,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 7189 transitions. [2021-08-21 12:03:51,912 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 7189 transitions. Word has length 22 [2021-08-21 12:03:51,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:51,912 INFO L470 AbstractCegarLoop]: Abstraction has 2344 states and 7189 transitions. [2021-08-21 12:03:51,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:51,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 7189 transitions. [2021-08-21 12:03:51,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:03:51,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:51,915 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:51,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2021-08-21 12:03:52,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-08-21 12:03:52,116 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:52,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:52,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1864225815, now seen corresponding path program 198 times [2021-08-21 12:03:52,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:52,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489388627] [2021-08-21 12:03:52,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:52,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:52,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:52,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489388627] [2021-08-21 12:03:52,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489388627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:52,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990347946] [2021-08-21 12:03:52,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:03:52,205 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:52,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:52,206 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:52,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2021-08-21 12:03:54,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:03:54,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:54,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:03:54,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:54,842 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:54,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990347946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:54,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:54,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-08-21 12:03:54,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94983731] [2021-08-21 12:03:54,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:03:54,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:54,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:03:54,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:03:54,843 INFO L87 Difference]: Start difference. First operand 2344 states and 7189 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:54,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:54,976 INFO L93 Difference]: Finished difference Result 3420 states and 10250 transitions. [2021-08-21 12:03:54,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:03:54,976 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:03:54,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:54,980 INFO L225 Difference]: With dead ends: 3420 [2021-08-21 12:03:54,980 INFO L226 Difference]: Without dead ends: 3420 [2021-08-21 12:03:54,980 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:03:54,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3420 states. [2021-08-21 12:03:55,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3420 to 2388. [2021-08-21 12:03:55,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 3.0670297444490995) internal successors, (7321), 2387 states have internal predecessors, (7321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:55,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 7321 transitions. [2021-08-21 12:03:55,016 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 7321 transitions. Word has length 22 [2021-08-21 12:03:55,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:55,016 INFO L470 AbstractCegarLoop]: Abstraction has 2388 states and 7321 transitions. [2021-08-21 12:03:55,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:55,016 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 7321 transitions. [2021-08-21 12:03:55,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:03:55,018 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:55,019 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:55,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:55,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-08-21 12:03:55,219 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:55,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:55,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1042764981, now seen corresponding path program 199 times [2021-08-21 12:03:55,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:55,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839540819] [2021-08-21 12:03:55,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:55,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:55,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:55,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:55,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839540819] [2021-08-21 12:03:55,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839540819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:55,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602562648] [2021-08-21 12:03:55,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:03:55,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:55,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:55,313 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:55,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2021-08-21 12:03:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:57,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:03:57,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:57,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602562648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:57,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:57,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-21 12:03:57,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831416706] [2021-08-21 12:03:57,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:03:57,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:57,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:03:57,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:03:57,961 INFO L87 Difference]: Start difference. First operand 2388 states and 7321 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:58,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:58,467 INFO L93 Difference]: Finished difference Result 4110 states and 12006 transitions. [2021-08-21 12:03:58,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 12:03:58,468 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:03:58,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:58,473 INFO L225 Difference]: With dead ends: 4110 [2021-08-21 12:03:58,474 INFO L226 Difference]: Without dead ends: 4102 [2021-08-21 12:03:58,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 429.5ms TimeCoverageRelationStatistics Valid=837, Invalid=1713, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 12:03:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2021-08-21 12:03:58,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 2823. [2021-08-21 12:03:58,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2823 states, 2822 states have (on average 3.1119773210489017) internal successors, (8782), 2822 states have internal predecessors, (8782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:58,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2823 states to 2823 states and 8782 transitions. [2021-08-21 12:03:58,546 INFO L78 Accepts]: Start accepts. Automaton has 2823 states and 8782 transitions. Word has length 22 [2021-08-21 12:03:58,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:58,546 INFO L470 AbstractCegarLoop]: Abstraction has 2823 states and 8782 transitions. [2021-08-21 12:03:58,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:58,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2823 states and 8782 transitions. [2021-08-21 12:03:58,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:03:58,549 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:58,549 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:58,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:58,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-08-21 12:03:58,749 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:58,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:58,750 INFO L82 PathProgramCache]: Analyzing trace with hash -471310175, now seen corresponding path program 200 times [2021-08-21 12:03:58,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:58,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423685826] [2021-08-21 12:03:58,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:58,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:58,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:58,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423685826] [2021-08-21 12:03:58,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423685826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:58,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879763231] [2021-08-21 12:03:58,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:03:58,823 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:58,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:58,824 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:58,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2021-08-21 12:04:01,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:04:01,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:01,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:04:01,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:01,520 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:01,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879763231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:01,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:01,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-21 12:04:01,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218698802] [2021-08-21 12:04:01,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:04:01,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:01,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:04:01,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:04:01,521 INFO L87 Difference]: Start difference. First operand 2823 states and 8782 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:02,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:02,070 INFO L93 Difference]: Finished difference Result 4077 states and 11861 transitions. [2021-08-21 12:04:02,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-21 12:04:02,071 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:02,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:02,077 INFO L225 Difference]: With dead ends: 4077 [2021-08-21 12:04:02,077 INFO L226 Difference]: Without dead ends: 4071 [2021-08-21 12:04:02,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 458.8ms TimeCoverageRelationStatistics Valid=851, Invalid=2571, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 12:04:02,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2021-08-21 12:04:02,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 2645. [2021-08-21 12:04:02,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 3.0726172465960664) internal successors, (8124), 2644 states have internal predecessors, (8124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:02,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 8124 transitions. [2021-08-21 12:04:02,119 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 8124 transitions. Word has length 22 [2021-08-21 12:04:02,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:02,119 INFO L470 AbstractCegarLoop]: Abstraction has 2645 states and 8124 transitions. [2021-08-21 12:04:02,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:02,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 8124 transitions. [2021-08-21 12:04:02,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:02,122 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:02,122 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:02,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2021-08-21 12:04:02,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-08-21 12:04:02,322 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:02,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:02,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1892085575, now seen corresponding path program 201 times [2021-08-21 12:04:02,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:02,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720550290] [2021-08-21 12:04:02,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:02,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:02,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:02,395 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:02,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:02,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720550290] [2021-08-21 12:04:02,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720550290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:02,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159638838] [2021-08-21 12:04:02,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:04:02,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:02,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:02,396 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:02,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2021-08-21 12:04:04,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:04:04,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:04,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:04:04,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:05,100 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:05,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159638838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:05,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:05,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-21 12:04:05,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527405277] [2021-08-21 12:04:05,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:04:05,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:05,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:04:05,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:04:05,101 INFO L87 Difference]: Start difference. First operand 2645 states and 8124 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:05,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:05,696 INFO L93 Difference]: Finished difference Result 3589 states and 10404 transitions. [2021-08-21 12:04:05,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-21 12:04:05,696 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:05,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:05,701 INFO L225 Difference]: With dead ends: 3589 [2021-08-21 12:04:05,701 INFO L226 Difference]: Without dead ends: 3589 [2021-08-21 12:04:05,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 491.4ms TimeCoverageRelationStatistics Valid=1188, Invalid=2118, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 12:04:05,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3589 states. [2021-08-21 12:04:05,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3589 to 2809. [2021-08-21 12:04:05,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2809 states, 2808 states have (on average 3.094017094017094) internal successors, (8688), 2808 states have internal predecessors, (8688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:05,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 8688 transitions. [2021-08-21 12:04:05,741 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 8688 transitions. Word has length 22 [2021-08-21 12:04:05,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:05,741 INFO L470 AbstractCegarLoop]: Abstraction has 2809 states and 8688 transitions. [2021-08-21 12:04:05,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:05,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 8688 transitions. [2021-08-21 12:04:05,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:05,744 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:05,744 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:05,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2021-08-21 12:04:05,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-08-21 12:04:05,945 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:05,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:05,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1427494471, now seen corresponding path program 202 times [2021-08-21 12:04:05,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:05,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796826009] [2021-08-21 12:04:05,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:05,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:06,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:06,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796826009] [2021-08-21 12:04:06,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796826009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:06,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657759387] [2021-08-21 12:04:06,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:04:06,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:06,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:06,021 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:06,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2021-08-21 12:04:08,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:04:08,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:08,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:04:08,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:08,709 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:08,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657759387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:08,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:08,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-21 12:04:08,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095796514] [2021-08-21 12:04:08,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:04:08,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:08,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:04:08,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:04:08,710 INFO L87 Difference]: Start difference. First operand 2809 states and 8688 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:09,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:09,330 INFO L93 Difference]: Finished difference Result 3314 states and 9794 transitions. [2021-08-21 12:04:09,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 12:04:09,330 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:09,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:09,335 INFO L225 Difference]: With dead ends: 3314 [2021-08-21 12:04:09,335 INFO L226 Difference]: Without dead ends: 3310 [2021-08-21 12:04:09,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 540.0ms TimeCoverageRelationStatistics Valid=1484, Invalid=2806, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 12:04:09,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2021-08-21 12:04:09,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 2519. [2021-08-21 12:04:09,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2519 states, 2518 states have (on average 3.0532168387609215) internal successors, (7688), 2518 states have internal predecessors, (7688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:09,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 7688 transitions. [2021-08-21 12:04:09,371 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 7688 transitions. Word has length 22 [2021-08-21 12:04:09,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:09,371 INFO L470 AbstractCegarLoop]: Abstraction has 2519 states and 7688 transitions. [2021-08-21 12:04:09,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:09,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 7688 transitions. [2021-08-21 12:04:09,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:09,374 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:09,374 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:09,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2021-08-21 12:04:09,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:09,575 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:09,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:09,575 INFO L82 PathProgramCache]: Analyzing trace with hash 63919627, now seen corresponding path program 203 times [2021-08-21 12:04:09,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:09,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497768180] [2021-08-21 12:04:09,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:09,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:09,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:09,648 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:09,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:09,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497768180] [2021-08-21 12:04:09,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497768180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:09,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489273593] [2021-08-21 12:04:09,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:04:09,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:09,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:09,649 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:09,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2021-08-21 12:04:12,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:04:12,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:12,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:04:12,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:12,348 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:12,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489273593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:12,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:12,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-21 12:04:12,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427178334] [2021-08-21 12:04:12,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:04:12,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:12,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:04:12,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:04:12,349 INFO L87 Difference]: Start difference. First operand 2519 states and 7688 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:12,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:12,874 INFO L93 Difference]: Finished difference Result 3834 states and 11012 transitions. [2021-08-21 12:04:12,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 12:04:12,874 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:12,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:12,879 INFO L225 Difference]: With dead ends: 3834 [2021-08-21 12:04:12,879 INFO L226 Difference]: Without dead ends: 3825 [2021-08-21 12:04:12,880 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 446.1ms TimeCoverageRelationStatistics Valid=728, Invalid=2352, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 12:04:12,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3825 states. [2021-08-21 12:04:12,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3825 to 2573. [2021-08-21 12:04:12,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2572 states have (on average 3.0544323483670297) internal successors, (7856), 2572 states have internal predecessors, (7856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:12,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 7856 transitions. [2021-08-21 12:04:12,919 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 7856 transitions. Word has length 22 [2021-08-21 12:04:12,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:12,919 INFO L470 AbstractCegarLoop]: Abstraction has 2573 states and 7856 transitions. [2021-08-21 12:04:12,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:12,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 7856 transitions. [2021-08-21 12:04:12,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:12,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:12,922 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:12,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2021-08-21 12:04:13,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-08-21 12:04:13,123 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:13,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:13,123 INFO L82 PathProgramCache]: Analyzing trace with hash -523825695, now seen corresponding path program 204 times [2021-08-21 12:04:13,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:13,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294097324] [2021-08-21 12:04:13,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:13,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:13,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:13,197 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:13,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:13,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294097324] [2021-08-21 12:04:13,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294097324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:13,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867837438] [2021-08-21 12:04:13,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:04:13,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:13,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:13,198 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:13,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2021-08-21 12:04:15,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:04:15,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:15,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:04:15,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:15,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867837438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:15,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:15,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-21 12:04:15,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432073721] [2021-08-21 12:04:15,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:04:15,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:15,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:04:15,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:04:15,909 INFO L87 Difference]: Start difference. First operand 2573 states and 7856 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:16,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:16,387 INFO L93 Difference]: Finished difference Result 3887 states and 11211 transitions. [2021-08-21 12:04:16,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 12:04:16,387 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:16,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:16,393 INFO L225 Difference]: With dead ends: 3887 [2021-08-21 12:04:16,393 INFO L226 Difference]: Without dead ends: 3875 [2021-08-21 12:04:16,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 415.2ms TimeCoverageRelationStatistics Valid=630, Invalid=2126, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 12:04:16,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3875 states. [2021-08-21 12:04:16,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3875 to 2597. [2021-08-21 12:04:16,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2597 states, 2596 states have (on average 3.0543143297380584) internal successors, (7929), 2596 states have internal predecessors, (7929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:16,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 7929 transitions. [2021-08-21 12:04:16,434 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 7929 transitions. Word has length 22 [2021-08-21 12:04:16,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:16,434 INFO L470 AbstractCegarLoop]: Abstraction has 2597 states and 7929 transitions. [2021-08-21 12:04:16,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:16,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 7929 transitions. [2021-08-21 12:04:16,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:16,437 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:16,437 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:16,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:16,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-08-21 12:04:16,638 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:16,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:16,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1564061493, now seen corresponding path program 205 times [2021-08-21 12:04:16,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:16,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578365370] [2021-08-21 12:04:16,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:16,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:16,712 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:16,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:16,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578365370] [2021-08-21 12:04:16,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578365370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:16,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921065577] [2021-08-21 12:04:16,712 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:04:16,712 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:16,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:16,713 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:16,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2021-08-21 12:04:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:19,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:04:19,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:19,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921065577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:19,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:19,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-21 12:04:19,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500009950] [2021-08-21 12:04:19,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:04:19,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:19,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:04:19,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:04:19,459 INFO L87 Difference]: Start difference. First operand 2597 states and 7929 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:19,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:19,862 INFO L93 Difference]: Finished difference Result 3976 states and 11538 transitions. [2021-08-21 12:04:19,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 12:04:19,862 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:19,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:19,868 INFO L225 Difference]: With dead ends: 3976 [2021-08-21 12:04:19,868 INFO L226 Difference]: Without dead ends: 3961 [2021-08-21 12:04:19,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 362.5ms TimeCoverageRelationStatistics Valid=558, Invalid=1892, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 12:04:19,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3961 states. [2021-08-21 12:04:19,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3961 to 2615. [2021-08-21 12:04:19,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2614 states have (on average 3.0478194338179034) internal successors, (7967), 2614 states have internal predecessors, (7967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:19,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 7967 transitions. [2021-08-21 12:04:19,917 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 7967 transitions. Word has length 22 [2021-08-21 12:04:19,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:19,917 INFO L470 AbstractCegarLoop]: Abstraction has 2615 states and 7967 transitions. [2021-08-21 12:04:19,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:19,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 7967 transitions. [2021-08-21 12:04:19,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:19,920 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:19,920 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:19,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:20,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:20,121 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:20,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:20,121 INFO L82 PathProgramCache]: Analyzing trace with hash 548367137, now seen corresponding path program 206 times [2021-08-21 12:04:20,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:20,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600845606] [2021-08-21 12:04:20,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:20,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:20,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:20,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600845606] [2021-08-21 12:04:20,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600845606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:20,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245559011] [2021-08-21 12:04:20,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:04:20,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:20,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:20,202 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:20,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2021-08-21 12:04:22,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:04:22,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:22,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:04:22,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:23,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245559011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:23,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:23,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-21 12:04:23,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961833629] [2021-08-21 12:04:23,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:04:23,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:23,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:04:23,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:04:23,038 INFO L87 Difference]: Start difference. First operand 2615 states and 7967 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:23,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:23,351 INFO L93 Difference]: Finished difference Result 3613 states and 10545 transitions. [2021-08-21 12:04:23,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:04:23,352 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:23,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:23,357 INFO L225 Difference]: With dead ends: 3613 [2021-08-21 12:04:23,357 INFO L226 Difference]: Without dead ends: 3598 [2021-08-21 12:04:23,357 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 307.6ms TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:04:23,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2021-08-21 12:04:23,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 2615. [2021-08-21 12:04:23,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2614 states have (on average 3.0459066564651875) internal successors, (7962), 2614 states have internal predecessors, (7962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:23,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 7962 transitions. [2021-08-21 12:04:23,421 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 7962 transitions. Word has length 22 [2021-08-21 12:04:23,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:23,421 INFO L470 AbstractCegarLoop]: Abstraction has 2615 states and 7962 transitions. [2021-08-21 12:04:23,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:23,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 7962 transitions. [2021-08-21 12:04:23,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:23,425 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:23,426 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:23,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:23,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:23,641 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:23,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:23,641 INFO L82 PathProgramCache]: Analyzing trace with hash 387158667, now seen corresponding path program 207 times [2021-08-21 12:04:23,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:23,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199689943] [2021-08-21 12:04:23,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:23,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:23,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:23,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199689943] [2021-08-21 12:04:23,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199689943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:23,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646639729] [2021-08-21 12:04:23,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:04:23,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:23,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:23,733 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:23,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2021-08-21 12:04:26,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:04:26,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:26,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:04:26,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:26,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646639729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:26,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:26,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-08-21 12:04:26,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720588792] [2021-08-21 12:04:26,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:04:26,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:26,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:04:26,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:04:26,506 INFO L87 Difference]: Start difference. First operand 2615 states and 7962 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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 12:04:27,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:27,094 INFO L93 Difference]: Finished difference Result 3520 states and 10061 transitions. [2021-08-21 12:04:27,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 12:04:27,094 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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 22 [2021-08-21 12:04:27,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:27,099 INFO L225 Difference]: With dead ends: 3520 [2021-08-21 12:04:27,099 INFO L226 Difference]: Without dead ends: 3511 [2021-08-21 12:04:27,100 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 489.1ms TimeCoverageRelationStatistics Valid=1109, Invalid=1971, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 12:04:27,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-08-21 12:04:27,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2798. [2021-08-21 12:04:27,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2797 states have (on average 3.068287450840186) internal successors, (8582), 2797 states have internal predecessors, (8582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:27,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 8582 transitions. [2021-08-21 12:04:27,141 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 8582 transitions. Word has length 22 [2021-08-21 12:04:27,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:27,141 INFO L470 AbstractCegarLoop]: Abstraction has 2798 states and 8582 transitions. [2021-08-21 12:04:27,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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 12:04:27,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 8582 transitions. [2021-08-21 12:04:27,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:27,145 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:27,145 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:27,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:27,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2021-08-21 12:04:27,345 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:27,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:27,345 INFO L82 PathProgramCache]: Analyzing trace with hash -77432437, now seen corresponding path program 208 times [2021-08-21 12:04:27,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:27,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134504858] [2021-08-21 12:04:27,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:27,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:27,416 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:27,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:27,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134504858] [2021-08-21 12:04:27,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134504858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:27,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74015175] [2021-08-21 12:04:27,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:04:27,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:27,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:27,417 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:27,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2021-08-21 12:04:30,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:04:30,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:30,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:04:30,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:30,176 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:30,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74015175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:30,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:30,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-08-21 12:04:30,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78805528] [2021-08-21 12:04:30,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:04:30,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:30,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:04:30,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:04:30,177 INFO L87 Difference]: Start difference. First operand 2798 states and 8582 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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 12:04:30,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:30,854 INFO L93 Difference]: Finished difference Result 3291 states and 9479 transitions. [2021-08-21 12:04:30,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 12:04:30,854 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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 22 [2021-08-21 12:04:30,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:30,859 INFO L225 Difference]: With dead ends: 3291 [2021-08-21 12:04:30,859 INFO L226 Difference]: Without dead ends: 3283 [2021-08-21 12:04:30,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 579.1ms TimeCoverageRelationStatistics Valid=1461, Invalid=2961, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 12:04:30,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-08-21 12:04:30,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2546. [2021-08-21 12:04:30,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 2545 states have (on average 3.0369351669941063) internal successors, (7729), 2545 states have internal predecessors, (7729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:30,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 7729 transitions. [2021-08-21 12:04:30,895 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 7729 transitions. Word has length 22 [2021-08-21 12:04:30,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:30,895 INFO L470 AbstractCegarLoop]: Abstraction has 2546 states and 7729 transitions. [2021-08-21 12:04:30,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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 12:04:30,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 7729 transitions. [2021-08-21 12:04:30,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:30,898 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:30,898 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:30,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2021-08-21 12:04:31,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:31,099 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:31,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:31,099 INFO L82 PathProgramCache]: Analyzing trace with hash -111031665, now seen corresponding path program 209 times [2021-08-21 12:04:31,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:31,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046585664] [2021-08-21 12:04:31,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:31,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:31,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:31,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:31,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046585664] [2021-08-21 12:04:31,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046585664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:31,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676523052] [2021-08-21 12:04:31,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:04:31,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:31,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:31,202 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:31,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2021-08-21 12:04:33,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:04:33,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:33,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:04:33,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:33,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676523052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:33,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:33,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-08-21 12:04:33,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406470451] [2021-08-21 12:04:33,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:04:33,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:33,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:04:33,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:04:33,952 INFO L87 Difference]: Start difference. First operand 2546 states and 7729 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:34,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:34,546 INFO L93 Difference]: Finished difference Result 2975 states and 8569 transitions. [2021-08-21 12:04:34,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 12:04:34,547 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:34,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:34,551 INFO L225 Difference]: With dead ends: 2975 [2021-08-21 12:04:34,551 INFO L226 Difference]: Without dead ends: 2967 [2021-08-21 12:04:34,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 532.6ms TimeCoverageRelationStatistics Valid=1464, Invalid=3092, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 12:04:34,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2021-08-21 12:04:34,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 2564. [2021-08-21 12:04:34,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2564 states, 2563 states have (on average 3.037846273897776) internal successors, (7786), 2563 states have internal predecessors, (7786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:34,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2564 states to 2564 states and 7786 transitions. [2021-08-21 12:04:34,587 INFO L78 Accepts]: Start accepts. Automaton has 2564 states and 7786 transitions. Word has length 22 [2021-08-21 12:04:34,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:34,587 INFO L470 AbstractCegarLoop]: Abstraction has 2564 states and 7786 transitions. [2021-08-21 12:04:34,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:34,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2564 states and 7786 transitions. [2021-08-21 12:04:34,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:34,590 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:34,590 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:34,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2021-08-21 12:04:34,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-08-21 12:04:34,790 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:34,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:34,790 INFO L82 PathProgramCache]: Analyzing trace with hash 979064775, now seen corresponding path program 210 times [2021-08-21 12:04:34,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:34,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076662] [2021-08-21 12:04:34,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:34,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:34,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:34,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076662] [2021-08-21 12:04:34,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:34,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813821092] [2021-08-21 12:04:34,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:04:34,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:34,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:34,862 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:34,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2021-08-21 12:04:37,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:04:37,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:37,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:04:37,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:37,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813821092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:37,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:37,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-08-21 12:04:37,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684712693] [2021-08-21 12:04:37,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:04:37,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:37,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:04:37,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:04:37,672 INFO L87 Difference]: Start difference. First operand 2564 states and 7786 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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 12:04:38,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:38,208 INFO L93 Difference]: Finished difference Result 3590 states and 10196 transitions. [2021-08-21 12:04:38,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 12:04:38,209 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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 22 [2021-08-21 12:04:38,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:38,213 INFO L225 Difference]: With dead ends: 3590 [2021-08-21 12:04:38,213 INFO L226 Difference]: Without dead ends: 3575 [2021-08-21 12:04:38,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 448.4ms TimeCoverageRelationStatistics Valid=1038, Invalid=1824, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 12:04:38,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3575 states. [2021-08-21 12:04:38,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3575 to 2746. [2021-08-21 12:04:38,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2746 states, 2745 states have (on average 3.0612021857923497) internal successors, (8403), 2745 states have internal predecessors, (8403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:38,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2746 states to 2746 states and 8403 transitions. [2021-08-21 12:04:38,251 INFO L78 Accepts]: Start accepts. Automaton has 2746 states and 8403 transitions. Word has length 22 [2021-08-21 12:04:38,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:38,252 INFO L470 AbstractCegarLoop]: Abstraction has 2746 states and 8403 transitions. [2021-08-21 12:04:38,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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 12:04:38,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2746 states and 8403 transitions. [2021-08-21 12:04:38,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:38,255 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:38,255 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:38,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:38,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-08-21 12:04:38,455 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:38,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:38,455 INFO L82 PathProgramCache]: Analyzing trace with hash 514473671, now seen corresponding path program 211 times [2021-08-21 12:04:38,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:38,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10654633] [2021-08-21 12:04:38,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:38,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:38,517 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:38,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:38,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10654633] [2021-08-21 12:04:38,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10654633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:38,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260545952] [2021-08-21 12:04:38,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:04:38,518 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:38,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:38,519 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:38,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2021-08-21 12:04:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:41,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:04:41,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:41,315 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:41,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260545952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:41,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:41,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-08-21 12:04:41,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513121196] [2021-08-21 12:04:41,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:04:41,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:41,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:04:41,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:04:41,316 INFO L87 Difference]: Start difference. First operand 2746 states and 8403 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:42,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:42,045 INFO L93 Difference]: Finished difference Result 3290 states and 9440 transitions. [2021-08-21 12:04:42,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-21 12:04:42,046 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:42,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:42,050 INFO L225 Difference]: With dead ends: 3290 [2021-08-21 12:04:42,050 INFO L226 Difference]: Without dead ends: 3284 [2021-08-21 12:04:42,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 627.8ms TimeCoverageRelationStatistics Valid=1537, Invalid=3293, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 12:04:42,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3284 states. [2021-08-21 12:04:42,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3284 to 2630. [2021-08-21 12:04:42,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 2629 states have (on average 3.0441232407759604) internal successors, (8003), 2629 states have internal predecessors, (8003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:42,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 8003 transitions. [2021-08-21 12:04:42,085 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 8003 transitions. Word has length 22 [2021-08-21 12:04:42,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:42,085 INFO L470 AbstractCegarLoop]: Abstraction has 2630 states and 8003 transitions. [2021-08-21 12:04:42,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:42,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 8003 transitions. [2021-08-21 12:04:42,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:42,088 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:42,088 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:42,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:42,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-08-21 12:04:42,289 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:42,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:42,289 INFO L82 PathProgramCache]: Analyzing trace with hash 480874443, now seen corresponding path program 212 times [2021-08-21 12:04:42,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:42,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918096330] [2021-08-21 12:04:42,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:42,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:42,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:42,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918096330] [2021-08-21 12:04:42,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918096330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:42,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130348261] [2021-08-21 12:04:42,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:04:42,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:42,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:42,358 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:42,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2021-08-21 12:04:45,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:04:45,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:45,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:04:45,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:45,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130348261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:45,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:45,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-08-21 12:04:45,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495293769] [2021-08-21 12:04:45,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:04:45,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:45,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:04:45,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:04:45,169 INFO L87 Difference]: Start difference. First operand 2630 states and 8003 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:45,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:45,871 INFO L93 Difference]: Finished difference Result 3240 states and 9276 transitions. [2021-08-21 12:04:45,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 12:04:45,871 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:45,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:45,875 INFO L225 Difference]: With dead ends: 3240 [2021-08-21 12:04:45,876 INFO L226 Difference]: Without dead ends: 3228 [2021-08-21 12:04:45,876 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 598.2ms TimeCoverageRelationStatistics Valid=1436, Invalid=3256, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 12:04:45,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2021-08-21 12:04:45,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2594. [2021-08-21 12:04:45,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2593 states have (on average 3.048206710374084) internal successors, (7904), 2593 states have internal predecessors, (7904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:45,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 7904 transitions. [2021-08-21 12:04:45,909 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 7904 transitions. Word has length 22 [2021-08-21 12:04:45,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:45,909 INFO L470 AbstractCegarLoop]: Abstraction has 2594 states and 7904 transitions. [2021-08-21 12:04:45,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:45,909 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 7904 transitions. [2021-08-21 12:04:45,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:45,912 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:45,912 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:45,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2021-08-21 12:04:46,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:46,113 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:46,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:46,113 INFO L82 PathProgramCache]: Analyzing trace with hash -560701625, now seen corresponding path program 213 times [2021-08-21 12:04:46,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:46,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709522070] [2021-08-21 12:04:46,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:46,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:46,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:46,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709522070] [2021-08-21 12:04:46,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709522070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:46,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599422714] [2021-08-21 12:04:46,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:04:46,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:46,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:46,187 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:46,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2021-08-21 12:04:48,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:04:48,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:48,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:04:48,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:49,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599422714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:49,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:49,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-08-21 12:04:49,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445894213] [2021-08-21 12:04:49,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:04:49,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:49,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:04:49,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:04:49,002 INFO L87 Difference]: Start difference. First operand 2594 states and 7904 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:49,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:49,618 INFO L93 Difference]: Finished difference Result 3083 states and 8911 transitions. [2021-08-21 12:04:49,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-21 12:04:49,619 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:49,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:49,622 INFO L225 Difference]: With dead ends: 3083 [2021-08-21 12:04:49,623 INFO L226 Difference]: Without dead ends: 3071 [2021-08-21 12:04:49,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 562.9ms TimeCoverageRelationStatistics Valid=1406, Invalid=3286, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 12:04:49,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2021-08-21 12:04:49,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 2614. [2021-08-21 12:04:49,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2614 states, 2613 states have (on average 3.050133945656334) internal successors, (7970), 2613 states have internal predecessors, (7970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:49,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2614 states to 2614 states and 7970 transitions. [2021-08-21 12:04:49,657 INFO L78 Accepts]: Start accepts. Automaton has 2614 states and 7970 transitions. Word has length 22 [2021-08-21 12:04:49,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:49,657 INFO L470 AbstractCegarLoop]: Abstraction has 2614 states and 7970 transitions. [2021-08-21 12:04:49,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:49,657 INFO L276 IsEmpty]: Start isEmpty. Operand 2614 states and 7970 transitions. [2021-08-21 12:04:49,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:49,660 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:49,660 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:49,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2021-08-21 12:04:49,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-08-21 12:04:49,860 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:49,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:49,861 INFO L82 PathProgramCache]: Analyzing trace with hash -2146682357, now seen corresponding path program 214 times [2021-08-21 12:04:49,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:49,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589407290] [2021-08-21 12:04:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:49,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:49,918 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:49,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:49,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589407290] [2021-08-21 12:04:49,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589407290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:49,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875894698] [2021-08-21 12:04:49,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:04:49,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:49,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:49,919 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:49,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2021-08-21 12:04:52,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:04:52,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:52,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:04:52,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:52,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875894698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:52,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:52,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-08-21 12:04:52,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011697249] [2021-08-21 12:04:52,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:04:52,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:52,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:04:52,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:04:52,738 INFO L87 Difference]: Start difference. First operand 2614 states and 7970 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:53,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:53,279 INFO L93 Difference]: Finished difference Result 3813 states and 10862 transitions. [2021-08-21 12:04:53,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 12:04:53,279 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:53,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:53,284 INFO L225 Difference]: With dead ends: 3813 [2021-08-21 12:04:53,284 INFO L226 Difference]: Without dead ends: 3801 [2021-08-21 12:04:53,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 455.1ms TimeCoverageRelationStatistics Valid=966, Invalid=1686, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 12:04:53,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2021-08-21 12:04:53,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 2922. [2021-08-21 12:04:53,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2922 states, 2921 states have (on average 3.0708661417322833) internal successors, (8970), 2921 states have internal predecessors, (8970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:53,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 8970 transitions. [2021-08-21 12:04:53,326 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 8970 transitions. Word has length 22 [2021-08-21 12:04:53,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:53,326 INFO L470 AbstractCegarLoop]: Abstraction has 2922 states and 8970 transitions. [2021-08-21 12:04:53,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:53,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 8970 transitions. [2021-08-21 12:04:53,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:53,330 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:53,330 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:53,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2021-08-21 12:04:53,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-08-21 12:04:53,530 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:53,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:53,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1683693835, now seen corresponding path program 215 times [2021-08-21 12:04:53,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:53,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412250528] [2021-08-21 12:04:53,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:53,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:53,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:53,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412250528] [2021-08-21 12:04:53,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412250528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:53,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771075] [2021-08-21 12:04:53,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:04:53,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:53,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:53,591 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:53,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2021-08-21 12:04:56,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:04:56,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:56,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:04:56,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:56,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:56,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:56,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-08-21 12:04:56,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852542791] [2021-08-21 12:04:56,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:04:56,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:56,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:04:56,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:04:56,455 INFO L87 Difference]: Start difference. First operand 2922 states and 8970 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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 12:04:57,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:57,213 INFO L93 Difference]: Finished difference Result 3570 states and 10279 transitions. [2021-08-21 12:04:57,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-21 12:04:57,213 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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 22 [2021-08-21 12:04:57,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:57,218 INFO L225 Difference]: With dead ends: 3570 [2021-08-21 12:04:57,218 INFO L226 Difference]: Without dead ends: 3564 [2021-08-21 12:04:57,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 661.2ms TimeCoverageRelationStatistics Valid=1706, Invalid=3844, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 12:04:57,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-08-21 12:04:57,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2830. [2021-08-21 12:04:57,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2830 states, 2829 states have (on average 3.0572640509013786) internal successors, (8649), 2829 states have internal predecessors, (8649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:57,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2830 states to 2830 states and 8649 transitions. [2021-08-21 12:04:57,257 INFO L78 Accepts]: Start accepts. Automaton has 2830 states and 8649 transitions. Word has length 22 [2021-08-21 12:04:57,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:57,257 INFO L470 AbstractCegarLoop]: Abstraction has 2830 states and 8649 transitions. [2021-08-21 12:04:57,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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 12:04:57,257 INFO L276 IsEmpty]: Start isEmpty. Operand 2830 states and 8649 transitions. [2021-08-21 12:04:57,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:57,260 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:57,260 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:57,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2021-08-21 12:04:57,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-08-21 12:04:57,461 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:57,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:57,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1650094607, now seen corresponding path program 216 times [2021-08-21 12:04:57,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:57,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888779190] [2021-08-21 12:04:57,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:57,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:57,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:57,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888779190] [2021-08-21 12:04:57,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888779190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:57,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882352811] [2021-08-21 12:04:57,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:04:57,525 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:57,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:57,526 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:57,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2021-08-21 12:05:00,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:05:00,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:00,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:05:00,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:00,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882352811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:00,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:00,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-08-21 12:05:00,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399170117] [2021-08-21 12:05:00,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:05:00,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:00,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:05:00,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:05:00,411 INFO L87 Difference]: Start difference. First operand 2830 states and 8649 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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 12:05:01,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:01,182 INFO L93 Difference]: Finished difference Result 3572 states and 10299 transitions. [2021-08-21 12:05:01,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-21 12:05:01,182 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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 22 [2021-08-21 12:05:01,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:01,187 INFO L225 Difference]: With dead ends: 3572 [2021-08-21 12:05:01,187 INFO L226 Difference]: Without dead ends: 3564 [2021-08-21 12:05:01,188 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 661.2ms TimeCoverageRelationStatistics Valid=1503, Invalid=3609, Unknown=0, NotChecked=0, Total=5112 [2021-08-21 12:05:01,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-08-21 12:05:01,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2871. [2021-08-21 12:05:01,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2871 states, 2870 states have (on average 3.0609756097560976) internal successors, (8785), 2870 states have internal predecessors, (8785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:01,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2871 states to 2871 states and 8785 transitions. [2021-08-21 12:05:01,228 INFO L78 Accepts]: Start accepts. Automaton has 2871 states and 8785 transitions. Word has length 22 [2021-08-21 12:05:01,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:01,228 INFO L470 AbstractCegarLoop]: Abstraction has 2871 states and 8785 transitions. [2021-08-21 12:05:01,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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 12:05:01,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2871 states and 8785 transitions. [2021-08-21 12:05:01,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:01,231 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:01,232 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:01,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:01,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:01,432 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:01,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:01,432 INFO L82 PathProgramCache]: Analyzing trace with hash 608518539, now seen corresponding path program 217 times [2021-08-21 12:05:01,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:01,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520762447] [2021-08-21 12:05:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:01,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:01,504 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:01,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:01,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520762447] [2021-08-21 12:05:01,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520762447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:01,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61436965] [2021-08-21 12:05:01,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:05:01,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:01,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:01,506 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:01,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2021-08-21 12:05:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:04,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:05:04,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:04,408 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:04,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61436965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:04,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:04,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-08-21 12:05:04,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31746711] [2021-08-21 12:05:04,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:05:04,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:04,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:05:04,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:05:04,409 INFO L87 Difference]: Start difference. First operand 2871 states and 8785 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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 12:05:05,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:05,081 INFO L93 Difference]: Finished difference Result 3644 states and 10545 transitions. [2021-08-21 12:05:05,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 12:05:05,081 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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 22 [2021-08-21 12:05:05,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:05,086 INFO L225 Difference]: With dead ends: 3644 [2021-08-21 12:05:05,087 INFO L226 Difference]: Without dead ends: 3632 [2021-08-21 12:05:05,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 601.8ms TimeCoverageRelationStatistics Valid=1373, Invalid=3457, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 12:05:05,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3632 states. [2021-08-21 12:05:05,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3632 to 2921. [2021-08-21 12:05:05,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2921 states, 2920 states have (on average 3.0705479452054796) internal successors, (8966), 2920 states have internal predecessors, (8966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:05,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2921 states to 2921 states and 8966 transitions. [2021-08-21 12:05:05,129 INFO L78 Accepts]: Start accepts. Automaton has 2921 states and 8966 transitions. Word has length 22 [2021-08-21 12:05:05,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:05,129 INFO L470 AbstractCegarLoop]: Abstraction has 2921 states and 8966 transitions. [2021-08-21 12:05:05,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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 12:05:05,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2921 states and 8966 transitions. [2021-08-21 12:05:05,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:05,132 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:05,132 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:05,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2021-08-21 12:05:05,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable230 [2021-08-21 12:05:05,333 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:05,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:05,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1615568497, now seen corresponding path program 218 times [2021-08-21 12:05:05,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:05,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082143664] [2021-08-21 12:05:05,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:05,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:05,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:05,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:05,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082143664] [2021-08-21 12:05:05,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082143664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:05,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605383226] [2021-08-21 12:05:05,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:05:05,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:05,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:05,411 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:05,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2021-08-21 12:05:08,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:05:08,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:08,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:05:08,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:08,338 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:08,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605383226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:08,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:08,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 12:05:08,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222025903] [2021-08-21 12:05:08,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:05:08,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:08,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:05:08,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:05:08,339 INFO L87 Difference]: Start difference. First operand 2921 states and 8966 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 12:05:08,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:08,927 INFO L93 Difference]: Finished difference Result 3521 states and 10275 transitions. [2021-08-21 12:05:08,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 12:05:08,927 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 22 [2021-08-21 12:05:08,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:08,932 INFO L225 Difference]: With dead ends: 3521 [2021-08-21 12:05:08,932 INFO L226 Difference]: Without dead ends: 3505 [2021-08-21 12:05:08,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 550.1ms TimeCoverageRelationStatistics Valid=1314, Invalid=3378, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 12:05:08,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3505 states. [2021-08-21 12:05:08,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3505 to 2952. [2021-08-21 12:05:08,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2952 states, 2951 states have (on average 3.0701457133175194) internal successors, (9060), 2951 states have internal predecessors, (9060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:08,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 9060 transitions. [2021-08-21 12:05:08,973 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 9060 transitions. Word has length 22 [2021-08-21 12:05:08,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:08,973 INFO L470 AbstractCegarLoop]: Abstraction has 2952 states and 9060 transitions. [2021-08-21 12:05:08,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 12:05:08,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 9060 transitions. [2021-08-21 12:05:08,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:08,976 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:08,976 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:09,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:09,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:09,177 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:09,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:09,177 INFO L82 PathProgramCache]: Analyzing trace with hash -260595641, now seen corresponding path program 219 times [2021-08-21 12:05:09,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:09,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729373914] [2021-08-21 12:05:09,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:09,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:09,235 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:09,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:09,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729373914] [2021-08-21 12:05:09,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729373914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:09,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110297818] [2021-08-21 12:05:09,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:05:09,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:09,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:09,237 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:09,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2021-08-21 12:05:12,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:05:12,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:12,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:05:12,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:12,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110297818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:12,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:12,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-08-21 12:05:12,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010676478] [2021-08-21 12:05:12,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:05:12,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:12,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:05:12,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:05:12,165 INFO L87 Difference]: Start difference. First operand 2952 states and 9060 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 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 12:05:12,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:12,700 INFO L93 Difference]: Finished difference Result 4650 states and 13519 transitions. [2021-08-21 12:05:12,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 12:05:12,701 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 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 22 [2021-08-21 12:05:12,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:12,707 INFO L225 Difference]: With dead ends: 4650 [2021-08-21 12:05:12,707 INFO L226 Difference]: Without dead ends: 4641 [2021-08-21 12:05:12,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 438.8ms TimeCoverageRelationStatistics Valid=950, Invalid=1702, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 12:05:12,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2021-08-21 12:05:12,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 3535. [2021-08-21 12:05:12,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3534 states have (on average 3.116581777023203) internal successors, (11014), 3534 states have internal predecessors, (11014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:12,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 11014 transitions. [2021-08-21 12:05:12,766 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 11014 transitions. Word has length 22 [2021-08-21 12:05:12,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:12,766 INFO L470 AbstractCegarLoop]: Abstraction has 3535 states and 11014 transitions. [2021-08-21 12:05:12,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 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 12:05:12,766 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 11014 transitions. [2021-08-21 12:05:12,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:12,771 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:12,771 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:12,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2021-08-21 12:05:12,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-08-21 12:05:12,971 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:12,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:12,972 INFO L82 PathProgramCache]: Analyzing trace with hash -725186745, now seen corresponding path program 220 times [2021-08-21 12:05:12,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:12,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320871300] [2021-08-21 12:05:12,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:12,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:12,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:13,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:13,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320871300] [2021-08-21 12:05:13,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320871300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:13,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507829186] [2021-08-21 12:05:13,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:05:13,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:13,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:13,028 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:13,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2021-08-21 12:05:15,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:05:15,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:15,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:05:15,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:16,052 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:16,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507829186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:16,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:16,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-08-21 12:05:16,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871285687] [2021-08-21 12:05:16,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:05:16,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:16,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:05:16,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:05:16,053 INFO L87 Difference]: Start difference. First operand 3535 states and 11014 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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 12:05:16,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:16,941 INFO L93 Difference]: Finished difference Result 4324 states and 12650 transitions. [2021-08-21 12:05:16,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-08-21 12:05:16,941 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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 22 [2021-08-21 12:05:16,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:16,947 INFO L225 Difference]: With dead ends: 4324 [2021-08-21 12:05:16,947 INFO L226 Difference]: Without dead ends: 4320 [2021-08-21 12:05:16,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2436 ImplicationChecksByTransitivity, 766.9ms TimeCoverageRelationStatistics Valid=1939, Invalid=4703, Unknown=0, NotChecked=0, Total=6642 [2021-08-21 12:05:16,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4320 states. [2021-08-21 12:05:16,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4320 to 3452. [2021-08-21 12:05:16,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3452 states, 3451 states have (on average 3.1048971312662994) internal successors, (10715), 3451 states have internal predecessors, (10715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:16,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3452 states to 3452 states and 10715 transitions. [2021-08-21 12:05:16,999 INFO L78 Accepts]: Start accepts. Automaton has 3452 states and 10715 transitions. Word has length 22 [2021-08-21 12:05:16,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:16,999 INFO L470 AbstractCegarLoop]: Abstraction has 3452 states and 10715 transitions. [2021-08-21 12:05:17,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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 12:05:17,000 INFO L276 IsEmpty]: Start isEmpty. Operand 3452 states and 10715 transitions. [2021-08-21 12:05:17,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:17,004 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:17,004 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:17,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:17,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-08-21 12:05:17,204 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:17,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:17,205 INFO L82 PathProgramCache]: Analyzing trace with hash -758785973, now seen corresponding path program 221 times [2021-08-21 12:05:17,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:17,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035785315] [2021-08-21 12:05:17,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:17,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:17,263 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:17,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:17,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035785315] [2021-08-21 12:05:17,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035785315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:17,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698376899] [2021-08-21 12:05:17,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:05:17,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:17,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:17,264 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:17,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2021-08-21 12:05:20,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:05:20,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:20,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:05:20,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:20,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698376899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:20,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:20,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-08-21 12:05:20,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384852007] [2021-08-21 12:05:20,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:05:20,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:20,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:05:20,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:05:20,219 INFO L87 Difference]: Start difference. First operand 3452 states and 10715 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 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 12:05:21,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:21,003 INFO L93 Difference]: Finished difference Result 4399 states and 12968 transitions. [2021-08-21 12:05:21,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-21 12:05:21,004 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 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 22 [2021-08-21 12:05:21,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:21,012 INFO L225 Difference]: With dead ends: 4399 [2021-08-21 12:05:21,012 INFO L226 Difference]: Without dead ends: 4391 [2021-08-21 12:05:21,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2068 ImplicationChecksByTransitivity, 731.6ms TimeCoverageRelationStatistics Valid=1649, Invalid=4203, Unknown=0, NotChecked=0, Total=5852 [2021-08-21 12:05:21,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4391 states. [2021-08-21 12:05:21,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4391 to 3540. [2021-08-21 12:05:21,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3540 states, 3539 states have (on average 3.1150042384854477) internal successors, (11024), 3539 states have internal predecessors, (11024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:21,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 11024 transitions. [2021-08-21 12:05:21,069 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 11024 transitions. Word has length 22 [2021-08-21 12:05:21,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:21,069 INFO L470 AbstractCegarLoop]: Abstraction has 3540 states and 11024 transitions. [2021-08-21 12:05:21,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 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 12:05:21,070 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 11024 transitions. [2021-08-21 12:05:21,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:21,074 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:21,074 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:21,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:21,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:21,275 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:21,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:21,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1800362041, now seen corresponding path program 222 times [2021-08-21 12:05:21,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:21,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208323584] [2021-08-21 12:05:21,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:21,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:21,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:21,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208323584] [2021-08-21 12:05:21,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208323584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:21,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945239343] [2021-08-21 12:05:21,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:05:21,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:21,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:21,341 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:21,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2021-08-21 12:05:24,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:05:24,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:24,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:05:24,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:24,270 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:24,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945239343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:24,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:24,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-08-21 12:05:24,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904770298] [2021-08-21 12:05:24,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:05:24,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:24,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:05:24,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:05:24,271 INFO L87 Difference]: Start difference. First operand 3540 states and 11024 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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 12:05:25,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:25,040 INFO L93 Difference]: Finished difference Result 4554 states and 13499 transitions. [2021-08-21 12:05:25,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-21 12:05:25,040 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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 22 [2021-08-21 12:05:25,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:25,047 INFO L225 Difference]: With dead ends: 4554 [2021-08-21 12:05:25,047 INFO L226 Difference]: Without dead ends: 4542 [2021-08-21 12:05:25,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 676.9ms TimeCoverageRelationStatistics Valid=1425, Invalid=3831, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 12:05:25,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4542 states. [2021-08-21 12:05:25,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4542 to 3796. [2021-08-21 12:05:25,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 3.129907773386034) internal successors, (11878), 3795 states have internal predecessors, (11878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:25,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 11878 transitions. [2021-08-21 12:05:25,103 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 11878 transitions. Word has length 22 [2021-08-21 12:05:25,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:25,103 INFO L470 AbstractCegarLoop]: Abstraction has 3796 states and 11878 transitions. [2021-08-21 12:05:25,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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 12:05:25,103 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 11878 transitions. [2021-08-21 12:05:25,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:25,108 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:25,108 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:25,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2021-08-21 12:05:25,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-08-21 12:05:25,309 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:25,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:25,309 INFO L82 PathProgramCache]: Analyzing trace with hash 270518219, now seen corresponding path program 223 times [2021-08-21 12:05:25,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:25,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110249208] [2021-08-21 12:05:25,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:25,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:25,381 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:25,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:25,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110249208] [2021-08-21 12:05:25,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110249208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:25,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642862587] [2021-08-21 12:05:25,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:05:25,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:25,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:25,382 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:25,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2021-08-21 12:05:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:28,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:05:28,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:28,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642862587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:28,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:28,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-08-21 12:05:28,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053942300] [2021-08-21 12:05:28,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:05:28,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:28,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:05:28,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:05:28,322 INFO L87 Difference]: Start difference. First operand 3796 states and 11878 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:28,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:28,998 INFO L93 Difference]: Finished difference Result 4840 states and 14458 transitions. [2021-08-21 12:05:28,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 12:05:28,998 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:28,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:29,005 INFO L225 Difference]: With dead ends: 4840 [2021-08-21 12:05:29,005 INFO L226 Difference]: Without dead ends: 4824 [2021-08-21 12:05:29,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1567 ImplicationChecksByTransitivity, 634.5ms TimeCoverageRelationStatistics Valid=1272, Invalid=3558, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 12:05:29,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4824 states. [2021-08-21 12:05:29,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4824 to 4073. [2021-08-21 12:05:29,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4073 states, 4072 states have (on average 3.143909626719057) internal successors, (12802), 4072 states have internal predecessors, (12802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:29,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4073 states to 4073 states and 12802 transitions. [2021-08-21 12:05:29,067 INFO L78 Accepts]: Start accepts. Automaton has 4073 states and 12802 transitions. Word has length 22 [2021-08-21 12:05:29,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:29,067 INFO L470 AbstractCegarLoop]: Abstraction has 4073 states and 12802 transitions. [2021-08-21 12:05:29,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:29,067 INFO L276 IsEmpty]: Start isEmpty. Operand 4073 states and 12802 transitions. [2021-08-21 12:05:29,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:29,072 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:29,072 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:29,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2021-08-21 12:05:29,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-08-21 12:05:29,273 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:29,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:29,273 INFO L82 PathProgramCache]: Analyzing trace with hash 43296839, now seen corresponding path program 224 times [2021-08-21 12:05:29,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:29,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429613722] [2021-08-21 12:05:29,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:29,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:29,352 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:29,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:29,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429613722] [2021-08-21 12:05:29,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429613722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:29,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261713256] [2021-08-21 12:05:29,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:05:29,352 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:29,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:29,353 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:29,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2021-08-21 12:05:32,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:05:32,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:32,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:05:32,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:32,399 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:32,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261713256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:32,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:32,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 12:05:32,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322143590] [2021-08-21 12:05:32,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:05:32,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:32,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:05:32,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:05:32,400 INFO L87 Difference]: Start difference. First operand 4073 states and 12802 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:32,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:32,990 INFO L93 Difference]: Finished difference Result 4789 states and 14429 transitions. [2021-08-21 12:05:32,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 12:05:32,990 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:32,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:32,997 INFO L225 Difference]: With dead ends: 4789 [2021-08-21 12:05:32,997 INFO L226 Difference]: Without dead ends: 4769 [2021-08-21 12:05:32,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 567.5ms TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 12:05:33,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4769 states. [2021-08-21 12:05:33,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4769 to 4116. [2021-08-21 12:05:33,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4116 states, 4115 states have (on average 3.143377885783718) internal successors, (12935), 4115 states have internal predecessors, (12935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:33,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4116 states to 4116 states and 12935 transitions. [2021-08-21 12:05:33,058 INFO L78 Accepts]: Start accepts. Automaton has 4116 states and 12935 transitions. Word has length 22 [2021-08-21 12:05:33,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:33,058 INFO L470 AbstractCegarLoop]: Abstraction has 4116 states and 12935 transitions. [2021-08-21 12:05:33,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:33,058 INFO L276 IsEmpty]: Start isEmpty. Operand 4116 states and 12935 transitions. [2021-08-21 12:05:33,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:33,063 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:33,063 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:33,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2021-08-21 12:05:33,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-08-21 12:05:33,265 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:33,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:33,265 INFO L82 PathProgramCache]: Analyzing trace with hash -750854521, now seen corresponding path program 225 times [2021-08-21 12:05:33,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:33,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667718624] [2021-08-21 12:05:33,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:33,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:33,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:33,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667718624] [2021-08-21 12:05:33,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667718624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:33,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696020701] [2021-08-21 12:05:33,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:05:33,343 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:33,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:33,344 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:33,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2021-08-21 12:05:36,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:05:36,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:36,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:05:36,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:36,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696020701] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:36,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:36,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-08-21 12:05:36,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900952475] [2021-08-21 12:05:36,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:05:36,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:36,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:05:36,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:05:36,296 INFO L87 Difference]: Start difference. First operand 4116 states and 12935 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:36,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:36,421 INFO L93 Difference]: Finished difference Result 4973 states and 15309 transitions. [2021-08-21 12:05:36,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:05:36,421 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:36,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:36,429 INFO L225 Difference]: With dead ends: 4973 [2021-08-21 12:05:36,429 INFO L226 Difference]: Without dead ends: 4973 [2021-08-21 12:05:36,430 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:05:36,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4973 states. [2021-08-21 12:05:36,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4973 to 4166. [2021-08-21 12:05:36,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4166 states, 4165 states have (on average 3.1423769507803123) internal successors, (13088), 4165 states have internal predecessors, (13088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:36,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4166 states to 4166 states and 13088 transitions. [2021-08-21 12:05:36,527 INFO L78 Accepts]: Start accepts. Automaton has 4166 states and 13088 transitions. Word has length 22 [2021-08-21 12:05:36,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:36,527 INFO L470 AbstractCegarLoop]: Abstraction has 4166 states and 13088 transitions. [2021-08-21 12:05:36,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:36,528 INFO L276 IsEmpty]: Start isEmpty. Operand 4166 states and 13088 transitions. [2021-08-21 12:05:36,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:36,535 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:36,535 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:36,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:36,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:36,757 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:36,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:36,758 INFO L82 PathProgramCache]: Analyzing trace with hash 522079187, now seen corresponding path program 226 times [2021-08-21 12:05:36,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:36,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723426092] [2021-08-21 12:05:36,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:36,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:36,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:36,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723426092] [2021-08-21 12:05:36,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723426092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:36,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278271298] [2021-08-21 12:05:36,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:05:36,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:36,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:36,835 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:36,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2021-08-21 12:05:39,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:05:39,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:39,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:05:39,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:39,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278271298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:39,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:39,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-21 12:05:39,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353661002] [2021-08-21 12:05:39,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:05:39,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:39,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:05:39,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:05:39,798 INFO L87 Difference]: Start difference. First operand 4166 states and 13088 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:40,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:40,017 INFO L93 Difference]: Finished difference Result 4567 states and 14102 transitions. [2021-08-21 12:05:40,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:05:40,018 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:40,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:40,025 INFO L225 Difference]: With dead ends: 4567 [2021-08-21 12:05:40,025 INFO L226 Difference]: Without dead ends: 4567 [2021-08-21 12:05:40,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=310, Invalid=620, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:05:40,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4567 states. [2021-08-21 12:05:40,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4567 to 4183. [2021-08-21 12:05:40,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4183 states, 4182 states have (on average 3.141798182687709) internal successors, (13139), 4182 states have internal predecessors, (13139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:40,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 13139 transitions. [2021-08-21 12:05:40,102 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 13139 transitions. Word has length 22 [2021-08-21 12:05:40,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:40,102 INFO L470 AbstractCegarLoop]: Abstraction has 4183 states and 13139 transitions. [2021-08-21 12:05:40,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:40,103 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 13139 transitions. [2021-08-21 12:05:40,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:40,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:40,110 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:40,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:40,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:40,326 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:40,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:40,326 INFO L82 PathProgramCache]: Analyzing trace with hash -2082945205, now seen corresponding path program 227 times [2021-08-21 12:05:40,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:40,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943103194] [2021-08-21 12:05:40,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:40,327 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:40,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:40,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:40,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943103194] [2021-08-21 12:05:40,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943103194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:40,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141276859] [2021-08-21 12:05:40,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:05:40,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:40,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:40,424 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:40,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2021-08-21 12:05:43,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:05:43,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:43,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:05:43,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:43,397 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:43,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141276859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:43,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:43,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-21 12:05:43,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594751065] [2021-08-21 12:05:43,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:05:43,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:43,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:05:43,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:05:43,398 INFO L87 Difference]: Start difference. First operand 4183 states and 13139 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:43,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:43,729 INFO L93 Difference]: Finished difference Result 4690 states and 14429 transitions. [2021-08-21 12:05:43,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:05:43,729 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:43,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:43,736 INFO L225 Difference]: With dead ends: 4690 [2021-08-21 12:05:43,736 INFO L226 Difference]: Without dead ends: 4690 [2021-08-21 12:05:43,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 245.3ms TimeCoverageRelationStatistics Valid=435, Invalid=897, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:05:43,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4690 states. [2021-08-21 12:05:43,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4690 to 4200. [2021-08-21 12:05:43,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4200 states, 4199 states have (on average 3.141224100976423) internal successors, (13190), 4199 states have internal predecessors, (13190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:43,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4200 states to 4200 states and 13190 transitions. [2021-08-21 12:05:43,798 INFO L78 Accepts]: Start accepts. Automaton has 4200 states and 13190 transitions. Word has length 22 [2021-08-21 12:05:43,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:43,798 INFO L470 AbstractCegarLoop]: Abstraction has 4200 states and 13190 transitions. [2021-08-21 12:05:43,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:43,798 INFO L276 IsEmpty]: Start isEmpty. Operand 4200 states and 13190 transitions. [2021-08-21 12:05:43,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:43,804 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:43,804 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:43,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2021-08-21 12:05:44,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:44,004 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:44,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:44,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1197146925, now seen corresponding path program 228 times [2021-08-21 12:05:44,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:44,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180996978] [2021-08-21 12:05:44,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:44,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:44,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:44,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180996978] [2021-08-21 12:05:44,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180996978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:44,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066922745] [2021-08-21 12:05:44,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:05:44,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:44,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:44,081 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:44,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2021-08-21 12:05:46,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:05:46,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:46,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:05:46,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:47,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066922745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:47,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:47,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-21 12:05:47,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852483455] [2021-08-21 12:05:47,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:05:47,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:47,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:05:47,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:05:47,111 INFO L87 Difference]: Start difference. First operand 4200 states and 13190 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:47,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:47,638 INFO L93 Difference]: Finished difference Result 4708 states and 14414 transitions. [2021-08-21 12:05:47,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 12:05:47,638 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:47,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:47,645 INFO L225 Difference]: With dead ends: 4708 [2021-08-21 12:05:47,645 INFO L226 Difference]: Without dead ends: 4708 [2021-08-21 12:05:47,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 391.8ms TimeCoverageRelationStatistics Valid=756, Invalid=1500, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 12:05:47,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4708 states. [2021-08-21 12:05:47,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4708 to 4231. [2021-08-21 12:05:47,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4231 states, 4230 states have (on average 3.1397163120567377) internal successors, (13281), 4230 states have internal predecessors, (13281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:47,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4231 states to 4231 states and 13281 transitions. [2021-08-21 12:05:47,702 INFO L78 Accepts]: Start accepts. Automaton has 4231 states and 13281 transitions. Word has length 22 [2021-08-21 12:05:47,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:47,702 INFO L470 AbstractCegarLoop]: Abstraction has 4231 states and 13281 transitions. [2021-08-21 12:05:47,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:47,702 INFO L276 IsEmpty]: Start isEmpty. Operand 4231 states and 13281 transitions. [2021-08-21 12:05:47,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:47,727 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:47,727 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:47,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2021-08-21 12:05:47,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:47,927 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:47,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:47,928 INFO L82 PathProgramCache]: Analyzing trace with hash 909637195, now seen corresponding path program 229 times [2021-08-21 12:05:47,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:47,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141410564] [2021-08-21 12:05:47,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:47,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:48,001 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:48,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:48,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141410564] [2021-08-21 12:05:48,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141410564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:48,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490130591] [2021-08-21 12:05:48,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:05:48,002 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:48,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:48,002 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:48,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2021-08-21 12:05:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:50,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:05:50,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:50,976 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:50,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490130591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:50,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:50,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-21 12:05:50,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960061138] [2021-08-21 12:05:50,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:05:50,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:50,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:05:50,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:05:50,977 INFO L87 Difference]: Start difference. First operand 4231 states and 13281 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:51,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:51,561 INFO L93 Difference]: Finished difference Result 4892 states and 14848 transitions. [2021-08-21 12:05:51,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 12:05:51,561 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:51,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:51,568 INFO L225 Difference]: With dead ends: 4892 [2021-08-21 12:05:51,568 INFO L226 Difference]: Without dead ends: 4892 [2021-08-21 12:05:51,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 470.7ms TimeCoverageRelationStatistics Valid=1057, Invalid=2023, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 12:05:51,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4892 states. [2021-08-21 12:05:51,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4892 to 4293. [2021-08-21 12:05:51,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4293 states, 4292 states have (on average 3.140959925442684) internal successors, (13481), 4292 states have internal predecessors, (13481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:51,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 13481 transitions. [2021-08-21 12:05:51,631 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 13481 transitions. Word has length 22 [2021-08-21 12:05:51,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:51,631 INFO L470 AbstractCegarLoop]: Abstraction has 4293 states and 13481 transitions. [2021-08-21 12:05:51,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:51,631 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 13481 transitions. [2021-08-21 12:05:51,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:51,636 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:51,637 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:51,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2021-08-21 12:05:51,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:51,837 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:51,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:51,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1239159341, now seen corresponding path program 230 times [2021-08-21 12:05:51,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:51,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033200861] [2021-08-21 12:05:51,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:51,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:51,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:51,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:51,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033200861] [2021-08-21 12:05:51,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033200861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:51,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263480573] [2021-08-21 12:05:51,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:05:51,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:51,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:51,913 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:51,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2021-08-21 12:05:54,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:05:54,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:54,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:05:54,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:54,906 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:54,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263480573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:54,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:54,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-21 12:05:54,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007053050] [2021-08-21 12:05:54,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:05:54,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:54,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:05:54,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:05:54,907 INFO L87 Difference]: Start difference. First operand 4293 states and 13481 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:55,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:55,528 INFO L93 Difference]: Finished difference Result 5068 states and 15287 transitions. [2021-08-21 12:05:55,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-21 12:05:55,528 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:55,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:55,535 INFO L225 Difference]: With dead ends: 5068 [2021-08-21 12:05:55,536 INFO L226 Difference]: Without dead ends: 5068 [2021-08-21 12:05:55,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 499.7ms TimeCoverageRelationStatistics Valid=1188, Invalid=2118, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 12:05:55,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5068 states. [2021-08-21 12:05:55,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5068 to 4271. [2021-08-21 12:05:55,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4271 states, 4270 states have (on average 3.1475409836065573) internal successors, (13440), 4270 states have internal predecessors, (13440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:55,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4271 states to 4271 states and 13440 transitions. [2021-08-21 12:05:55,603 INFO L78 Accepts]: Start accepts. Automaton has 4271 states and 13440 transitions. Word has length 22 [2021-08-21 12:05:55,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:55,603 INFO L470 AbstractCegarLoop]: Abstraction has 4271 states and 13440 transitions. [2021-08-21 12:05:55,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:55,603 INFO L276 IsEmpty]: Start isEmpty. Operand 4271 states and 13440 transitions. [2021-08-21 12:05:55,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:55,609 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:55,609 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:55,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2021-08-21 12:05:55,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:55,809 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:55,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:55,809 INFO L82 PathProgramCache]: Analyzing trace with hash -667704535, now seen corresponding path program 231 times [2021-08-21 12:05:55,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:55,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370165178] [2021-08-21 12:05:55,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:55,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:55,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:55,883 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:55,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:55,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370165178] [2021-08-21 12:05:55,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370165178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:55,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375940826] [2021-08-21 12:05:55,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:05:55,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:55,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:55,887 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:55,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2021-08-21 12:05:58,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:05:58,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:58,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:05:58,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:58,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375940826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:58,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:58,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-21 12:05:58,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117852416] [2021-08-21 12:05:58,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:05:58,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:58,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:05:58,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:05:58,884 INFO L87 Difference]: Start difference. First operand 4271 states and 13440 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:59,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:59,505 INFO L93 Difference]: Finished difference Result 4740 states and 14442 transitions. [2021-08-21 12:05:59,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 12:05:59,505 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:59,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:59,513 INFO L225 Difference]: With dead ends: 4740 [2021-08-21 12:05:59,514 INFO L226 Difference]: Without dead ends: 4734 [2021-08-21 12:05:59,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 518.9ms TimeCoverageRelationStatistics Valid=1484, Invalid=2806, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 12:05:59,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4734 states. [2021-08-21 12:05:59,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4734 to 4087. [2021-08-21 12:05:59,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4087 states, 4086 states have (on average 3.137542829172785) internal successors, (12820), 4086 states have internal predecessors, (12820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:59,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4087 states to 4087 states and 12820 transitions. [2021-08-21 12:05:59,593 INFO L78 Accepts]: Start accepts. Automaton has 4087 states and 12820 transitions. Word has length 22 [2021-08-21 12:05:59,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:59,593 INFO L470 AbstractCegarLoop]: Abstraction has 4087 states and 12820 transitions. [2021-08-21 12:05:59,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:59,594 INFO L276 IsEmpty]: Start isEmpty. Operand 4087 states and 12820 transitions. [2021-08-21 12:05:59,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:59,599 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:59,599 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:59,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:59,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-08-21 12:05:59,800 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:59,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:59,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1695691215, now seen corresponding path program 232 times [2021-08-21 12:05:59,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:59,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695409229] [2021-08-21 12:05:59,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:59,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:59,875 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:59,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:59,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695409229] [2021-08-21 12:05:59,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695409229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:59,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369093373] [2021-08-21 12:05:59,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:05:59,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:59,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:59,876 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:59,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2021-08-21 12:06:02,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:06:02,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:02,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:06:02,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:02,937 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:02,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369093373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:02,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:02,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-21 12:06:02,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075113103] [2021-08-21 12:06:02,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:06:02,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:02,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:06:02,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:06:02,938 INFO L87 Difference]: Start difference. First operand 4087 states and 12820 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:03,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:03,462 INFO L93 Difference]: Finished difference Result 5641 states and 17112 transitions. [2021-08-21 12:06:03,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 12:06:03,462 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:03,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:03,471 INFO L225 Difference]: With dead ends: 5641 [2021-08-21 12:06:03,471 INFO L226 Difference]: Without dead ends: 5629 [2021-08-21 12:06:03,472 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 437.1ms TimeCoverageRelationStatistics Valid=837, Invalid=1713, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 12:06:03,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5629 states. [2021-08-21 12:06:03,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5629 to 4769. [2021-08-21 12:06:03,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4769 states, 4768 states have (on average 3.1621224832214767) internal successors, (15077), 4768 states have internal predecessors, (15077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:03,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4769 states to 4769 states and 15077 transitions. [2021-08-21 12:06:03,558 INFO L78 Accepts]: Start accepts. Automaton has 4769 states and 15077 transitions. Word has length 22 [2021-08-21 12:06:03,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:03,558 INFO L470 AbstractCegarLoop]: Abstraction has 4769 states and 15077 transitions. [2021-08-21 12:06:03,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:03,558 INFO L276 IsEmpty]: Start isEmpty. Operand 4769 states and 15077 transitions. [2021-08-21 12:06:03,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:03,565 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:03,565 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:03,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:03,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-08-21 12:06:03,765 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:03,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:03,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1231100111, now seen corresponding path program 233 times [2021-08-21 12:06:03,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:03,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116904110] [2021-08-21 12:06:03,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:03,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:03,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:03,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:03,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116904110] [2021-08-21 12:06:03,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116904110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:03,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450934433] [2021-08-21 12:06:03,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:06:03,841 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:03,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:03,841 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:03,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2021-08-21 12:06:06,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:06:06,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:06,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:06:06,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:06,982 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:06,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450934433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:06,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:06,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-21 12:06:06,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069437911] [2021-08-21 12:06:06,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:06:06,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:06,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:06:06,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:06:06,983 INFO L87 Difference]: Start difference. First operand 4769 states and 15077 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:07,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:07,560 INFO L93 Difference]: Finished difference Result 5550 states and 16864 transitions. [2021-08-21 12:06:07,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-21 12:06:07,560 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:07,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:07,569 INFO L225 Difference]: With dead ends: 5550 [2021-08-21 12:06:07,569 INFO L226 Difference]: Without dead ends: 5546 [2021-08-21 12:06:07,570 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 467.5ms TimeCoverageRelationStatistics Valid=851, Invalid=2571, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 12:06:07,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5546 states. [2021-08-21 12:06:07,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5546 to 4533. [2021-08-21 12:06:07,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4533 states, 4532 states have (on average 3.1385701676963813) internal successors, (14224), 4532 states have internal predecessors, (14224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:07,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4533 states to 4533 states and 14224 transitions. [2021-08-21 12:06:07,644 INFO L78 Accepts]: Start accepts. Automaton has 4533 states and 14224 transitions. Word has length 22 [2021-08-21 12:06:07,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:07,644 INFO L470 AbstractCegarLoop]: Abstraction has 4533 states and 14224 transitions. [2021-08-21 12:06:07,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:07,645 INFO L276 IsEmpty]: Start isEmpty. Operand 4533 states and 14224 transitions. [2021-08-21 12:06:07,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:07,651 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:07,651 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:07,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2021-08-21 12:06:07,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-08-21 12:06:07,851 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:07,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:07,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1197500883, now seen corresponding path program 234 times [2021-08-21 12:06:07,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:07,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929273801] [2021-08-21 12:06:07,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:07,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:07,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:07,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929273801] [2021-08-21 12:06:07,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929273801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:07,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976763586] [2021-08-21 12:06:07,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:06:07,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:07,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:07,957 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:07,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2021-08-21 12:06:10,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:06:10,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:10,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:06:10,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:11,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976763586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:11,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:11,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-21 12:06:11,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819651005] [2021-08-21 12:06:11,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:06:11,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:11,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:06:11,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:06:11,010 INFO L87 Difference]: Start difference. First operand 4533 states and 14224 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:11,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:11,541 INFO L93 Difference]: Finished difference Result 5471 states and 16546 transitions. [2021-08-21 12:06:11,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 12:06:11,542 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:11,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:11,551 INFO L225 Difference]: With dead ends: 5471 [2021-08-21 12:06:11,551 INFO L226 Difference]: Without dead ends: 5463 [2021-08-21 12:06:11,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 439.2ms TimeCoverageRelationStatistics Valid=728, Invalid=2352, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 12:06:11,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5463 states. [2021-08-21 12:06:11,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5463 to 4659. [2021-08-21 12:06:11,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 3.1386861313868613) internal successors, (14620), 4658 states have internal predecessors, (14620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:11,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 14620 transitions. [2021-08-21 12:06:11,622 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 14620 transitions. Word has length 22 [2021-08-21 12:06:11,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:11,622 INFO L470 AbstractCegarLoop]: Abstraction has 4659 states and 14620 transitions. [2021-08-21 12:06:11,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:11,623 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 14620 transitions. [2021-08-21 12:06:11,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:11,629 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:11,629 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:11,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2021-08-21 12:06:11,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:11,830 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:11,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:11,830 INFO L82 PathProgramCache]: Analyzing trace with hash 155924815, now seen corresponding path program 235 times [2021-08-21 12:06:11,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:11,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199646943] [2021-08-21 12:06:11,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:11,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:11,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:11,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:11,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199646943] [2021-08-21 12:06:11,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199646943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:11,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463475606] [2021-08-21 12:06:11,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:06:11,903 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:11,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:11,905 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:11,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2021-08-21 12:06:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:14,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:06:14,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:15,058 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:15,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463475606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:15,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:15,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-21 12:06:15,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434421272] [2021-08-21 12:06:15,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:06:15,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:15,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:06:15,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:06:15,058 INFO L87 Difference]: Start difference. First operand 4659 states and 14620 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:15,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:15,556 INFO L93 Difference]: Finished difference Result 5651 states and 17165 transitions. [2021-08-21 12:06:15,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 12:06:15,556 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:15,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:15,566 INFO L225 Difference]: With dead ends: 5651 [2021-08-21 12:06:15,566 INFO L226 Difference]: Without dead ends: 5639 [2021-08-21 12:06:15,566 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 411.8ms TimeCoverageRelationStatistics Valid=630, Invalid=2126, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 12:06:15,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5639 states. [2021-08-21 12:06:15,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5639 to 4746. [2021-08-21 12:06:15,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4746 states, 4745 states have (on average 3.134668071654373) internal successors, (14874), 4745 states have internal predecessors, (14874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:15,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4746 states to 4746 states and 14874 transitions. [2021-08-21 12:06:15,648 INFO L78 Accepts]: Start accepts. Automaton has 4746 states and 14874 transitions. Word has length 22 [2021-08-21 12:06:15,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:15,648 INFO L470 AbstractCegarLoop]: Abstraction has 4746 states and 14874 transitions. [2021-08-21 12:06:15,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:15,648 INFO L276 IsEmpty]: Start isEmpty. Operand 4746 states and 14874 transitions. [2021-08-21 12:06:15,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:15,655 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:15,655 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:15,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Ended with exit code 0 [2021-08-21 12:06:15,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:15,857 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:15,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:15,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2068162221, now seen corresponding path program 236 times [2021-08-21 12:06:15,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:15,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30017893] [2021-08-21 12:06:15,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:15,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:15,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:15,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30017893] [2021-08-21 12:06:15,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30017893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:15,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871727959] [2021-08-21 12:06:15,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:06:15,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:15,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:15,942 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:15,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2021-08-21 12:06:18,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:06:18,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:18,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:06:18,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:19,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871727959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:19,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:19,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-21 12:06:19,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541737335] [2021-08-21 12:06:19,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:06:19,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:19,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:06:19,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:06:19,028 INFO L87 Difference]: Start difference. First operand 4746 states and 14874 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:19,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:19,452 INFO L93 Difference]: Finished difference Result 5785 states and 17615 transitions. [2021-08-21 12:06:19,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 12:06:19,452 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:19,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:19,462 INFO L225 Difference]: With dead ends: 5785 [2021-08-21 12:06:19,462 INFO L226 Difference]: Without dead ends: 5769 [2021-08-21 12:06:19,462 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 373.4ms TimeCoverageRelationStatistics Valid=558, Invalid=1892, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 12:06:19,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5769 states. [2021-08-21 12:06:19,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5769 to 4762. [2021-08-21 12:06:19,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4762 states, 4761 states have (on average 3.131064902331443) internal successors, (14907), 4761 states have internal predecessors, (14907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:19,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 14907 transitions. [2021-08-21 12:06:19,551 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 14907 transitions. Word has length 22 [2021-08-21 12:06:19,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:19,552 INFO L470 AbstractCegarLoop]: Abstraction has 4762 states and 14907 transitions. [2021-08-21 12:06:19,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:19,552 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 14907 transitions. [2021-08-21 12:06:19,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:19,559 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:19,559 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:19,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:19,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:19,761 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:19,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:19,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1999583695, now seen corresponding path program 237 times [2021-08-21 12:06:19,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:19,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284698518] [2021-08-21 12:06:19,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:19,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:19,837 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:19,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:19,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284698518] [2021-08-21 12:06:19,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284698518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:19,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268136021] [2021-08-21 12:06:19,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:06:19,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:19,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:19,838 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:19,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2021-08-21 12:06:22,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:06:22,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:22,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:06:22,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:22,937 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:22,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268136021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:22,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:22,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-21 12:06:22,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140493188] [2021-08-21 12:06:22,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:06:22,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:22,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:06:22,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:06:22,938 INFO L87 Difference]: Start difference. First operand 4762 states and 14907 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:23,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:23,244 INFO L93 Difference]: Finished difference Result 5323 states and 16253 transitions. [2021-08-21 12:06:23,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:06:23,244 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:23,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:23,252 INFO L225 Difference]: With dead ends: 5323 [2021-08-21 12:06:23,252 INFO L226 Difference]: Without dead ends: 5313 [2021-08-21 12:06:23,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 310.3ms TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:06:23,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5313 states. [2021-08-21 12:06:23,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5313 to 4762. [2021-08-21 12:06:23,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4762 states, 4761 states have (on average 3.1300147027935306) internal successors, (14902), 4761 states have internal predecessors, (14902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:23,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 14902 transitions. [2021-08-21 12:06:23,323 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 14902 transitions. Word has length 22 [2021-08-21 12:06:23,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:23,323 INFO L470 AbstractCegarLoop]: Abstraction has 4762 states and 14902 transitions. [2021-08-21 12:06:23,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:23,323 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 14902 transitions. [2021-08-21 12:06:23,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:23,329 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:23,329 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:23,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2021-08-21 12:06:23,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:23,530 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:23,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:23,530 INFO L82 PathProgramCache]: Analyzing trace with hash -2018594477, now seen corresponding path program 238 times [2021-08-21 12:06:23,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:23,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856156762] [2021-08-21 12:06:23,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:23,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:23,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:23,632 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:23,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:23,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856156762] [2021-08-21 12:06:23,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856156762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:23,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366389066] [2021-08-21 12:06:23,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:06:23,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:23,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:23,633 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:23,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2021-08-21 12:06:26,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:06:26,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:26,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:06:26,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:26,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366389066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:26,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:26,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-08-21 12:06:26,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102907306] [2021-08-21 12:06:26,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:06:26,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:26,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:06:26,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:06:26,712 INFO L87 Difference]: Start difference. First operand 4762 states and 14902 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:26,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:26,840 INFO L93 Difference]: Finished difference Result 5170 states and 15985 transitions. [2021-08-21 12:06:26,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:06:26,840 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:26,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:26,848 INFO L225 Difference]: With dead ends: 5170 [2021-08-21 12:06:26,848 INFO L226 Difference]: Without dead ends: 5158 [2021-08-21 12:06:26,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 159.8ms TimeCoverageRelationStatistics Valid=213, Invalid=599, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:06:26,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5158 states. [2021-08-21 12:06:26,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5158 to 4762. [2021-08-21 12:06:26,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4762 states, 4761 states have (on average 3.1298046628859484) internal successors, (14901), 4761 states have internal predecessors, (14901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:26,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 14901 transitions. [2021-08-21 12:06:26,934 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 14901 transitions. Word has length 22 [2021-08-21 12:06:26,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:26,934 INFO L470 AbstractCegarLoop]: Abstraction has 4762 states and 14901 transitions. [2021-08-21 12:06:26,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:26,934 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 14901 transitions. [2021-08-21 12:06:26,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:26,941 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:26,941 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:26,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2021-08-21 12:06:27,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:27,142 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:27,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:27,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1328318471, now seen corresponding path program 239 times [2021-08-21 12:06:27,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:27,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507509627] [2021-08-21 12:06:27,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:27,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:27,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:27,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507509627] [2021-08-21 12:06:27,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507509627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:27,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350039658] [2021-08-21 12:06:27,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:06:27,235 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:27,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:27,235 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:27,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2021-08-21 12:06:30,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:06:30,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:30,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:06:30,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:30,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350039658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:30,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:30,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-08-21 12:06:30,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73083976] [2021-08-21 12:06:30,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:06:30,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:30,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:06:30,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:06:30,348 INFO L87 Difference]: Start difference. First operand 4762 states and 14901 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 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 12:06:30,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:30,814 INFO L93 Difference]: Finished difference Result 5204 states and 15992 transitions. [2021-08-21 12:06:30,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 12:06:30,815 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 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 22 [2021-08-21 12:06:30,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:30,823 INFO L225 Difference]: With dead ends: 5204 [2021-08-21 12:06:30,823 INFO L226 Difference]: Without dead ends: 5204 [2021-08-21 12:06:30,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 406.0ms TimeCoverageRelationStatistics Valid=785, Invalid=1665, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 12:06:30,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5204 states. [2021-08-21 12:06:30,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5204 to 4777. [2021-08-21 12:06:30,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4777 states, 4776 states have (on average 3.129396984924623) internal successors, (14946), 4776 states have internal predecessors, (14946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:30,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4777 states to 4777 states and 14946 transitions. [2021-08-21 12:06:30,895 INFO L78 Accepts]: Start accepts. Automaton has 4777 states and 14946 transitions. Word has length 22 [2021-08-21 12:06:30,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:30,895 INFO L470 AbstractCegarLoop]: Abstraction has 4777 states and 14946 transitions. [2021-08-21 12:06:30,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 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 12:06:30,895 INFO L276 IsEmpty]: Start isEmpty. Operand 4777 states and 14946 transitions. [2021-08-21 12:06:30,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:30,903 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:30,903 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:30,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2021-08-21 12:06:31,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:31,103 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:31,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:31,104 INFO L82 PathProgramCache]: Analyzing trace with hash -428083449, now seen corresponding path program 240 times [2021-08-21 12:06:31,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:31,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877293168] [2021-08-21 12:06:31,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:31,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:31,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:31,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877293168] [2021-08-21 12:06:31,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877293168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:31,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788646781] [2021-08-21 12:06:31,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:06:31,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:31,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:31,174 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:31,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2021-08-21 12:06:34,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:06:34,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:34,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:06:34,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:34,320 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:34,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788646781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:34,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:34,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-08-21 12:06:34,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007741769] [2021-08-21 12:06:34,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:06:34,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:34,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:06:34,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:06:34,321 INFO L87 Difference]: Start difference. First operand 4777 states and 14946 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:34,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:34,720 INFO L93 Difference]: Finished difference Result 5391 states and 16437 transitions. [2021-08-21 12:06:34,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:06:34,721 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:34,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:34,728 INFO L225 Difference]: With dead ends: 5391 [2021-08-21 12:06:34,728 INFO L226 Difference]: Without dead ends: 5381 [2021-08-21 12:06:34,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 342.3ms TimeCoverageRelationStatistics Valid=600, Invalid=1292, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 12:06:34,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5381 states. [2021-08-21 12:06:34,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5381 to 4798. [2021-08-21 12:06:34,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4798 states, 4797 states have (on average 3.128413591828226) internal successors, (15007), 4797 states have internal predecessors, (15007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:34,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4798 states to 4798 states and 15007 transitions. [2021-08-21 12:06:34,808 INFO L78 Accepts]: Start accepts. Automaton has 4798 states and 15007 transitions. Word has length 22 [2021-08-21 12:06:34,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:34,809 INFO L470 AbstractCegarLoop]: Abstraction has 4798 states and 15007 transitions. [2021-08-21 12:06:34,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:34,809 INFO L276 IsEmpty]: Start isEmpty. Operand 4798 states and 15007 transitions. [2021-08-21 12:06:34,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:34,815 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:34,815 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:34,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Ended with exit code 0 [2021-08-21 12:06:35,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:35,016 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:35,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:35,016 INFO L82 PathProgramCache]: Analyzing trace with hash -2147309561, now seen corresponding path program 241 times [2021-08-21 12:06:35,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:35,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542587617] [2021-08-21 12:06:35,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:35,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:35,131 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:35,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:35,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542587617] [2021-08-21 12:06:35,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542587617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:35,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625902430] [2021-08-21 12:06:35,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:06:35,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:35,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:35,132 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:35,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2021-08-21 12:06:38,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:38,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:06:38,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:38,250 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:38,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625902430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:38,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:38,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-08-21 12:06:38,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638153734] [2021-08-21 12:06:38,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:06:38,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:38,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:06:38,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:06:38,251 INFO L87 Difference]: Start difference. First operand 4798 states and 15007 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:38,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:38,668 INFO L93 Difference]: Finished difference Result 5359 states and 16352 transitions. [2021-08-21 12:06:38,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 12:06:38,669 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:38,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:38,677 INFO L225 Difference]: With dead ends: 5359 [2021-08-21 12:06:38,677 INFO L226 Difference]: Without dead ends: 5349 [2021-08-21 12:06:38,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 345.0ms TimeCoverageRelationStatistics Valid=608, Invalid=1284, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 12:06:38,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5349 states. [2021-08-21 12:06:38,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5349 to 4815. [2021-08-21 12:06:38,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4815 states, 4814 states have (on average 3.1258828417116744) internal successors, (15048), 4814 states have internal predecessors, (15048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:38,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4815 states to 4815 states and 15048 transitions. [2021-08-21 12:06:38,764 INFO L78 Accepts]: Start accepts. Automaton has 4815 states and 15048 transitions. Word has length 22 [2021-08-21 12:06:38,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:38,764 INFO L470 AbstractCegarLoop]: Abstraction has 4815 states and 15048 transitions. [2021-08-21 12:06:38,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:38,765 INFO L276 IsEmpty]: Start isEmpty. Operand 4815 states and 15048 transitions. [2021-08-21 12:06:38,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:38,772 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:38,772 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:38,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:38,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-08-21 12:06:38,974 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:38,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:38,974 INFO L82 PathProgramCache]: Analyzing trace with hash 845272839, now seen corresponding path program 242 times [2021-08-21 12:06:38,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:38,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62143413] [2021-08-21 12:06:38,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:38,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:38,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:39,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:39,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62143413] [2021-08-21 12:06:39,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62143413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:39,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865573457] [2021-08-21 12:06:39,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:06:39,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:39,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:39,092 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:39,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2021-08-21 12:06:42,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:06:42,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:42,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:06:42,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:42,271 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:42,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865573457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:42,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:42,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-08-21 12:06:42,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24576262] [2021-08-21 12:06:42,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:06:42,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:42,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:06:42,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:06:42,272 INFO L87 Difference]: Start difference. First operand 4815 states and 15048 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:42,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:42,830 INFO L93 Difference]: Finished difference Result 5632 states and 17049 transitions. [2021-08-21 12:06:42,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 12:06:42,831 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:42,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:42,841 INFO L225 Difference]: With dead ends: 5632 [2021-08-21 12:06:42,841 INFO L226 Difference]: Without dead ends: 5628 [2021-08-21 12:06:42,842 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 491.9ms TimeCoverageRelationStatistics Valid=940, Invalid=1816, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 12:06:42,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5628 states. [2021-08-21 12:06:42,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5628 to 4825. [2021-08-21 12:06:42,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4825 states, 4824 states have (on average 3.1237562189054726) internal successors, (15069), 4824 states have internal predecessors, (15069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:42,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4825 states to 4825 states and 15069 transitions. [2021-08-21 12:06:42,944 INFO L78 Accepts]: Start accepts. Automaton has 4825 states and 15069 transitions. Word has length 22 [2021-08-21 12:06:42,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:42,944 INFO L470 AbstractCegarLoop]: Abstraction has 4825 states and 15069 transitions. [2021-08-21 12:06:42,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:42,945 INFO L276 IsEmpty]: Start isEmpty. Operand 4825 states and 15069 transitions. [2021-08-21 12:06:42,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:42,952 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:42,952 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:42,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:43,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-08-21 12:06:43,156 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:43,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:43,156 INFO L82 PathProgramCache]: Analyzing trace with hash 803260423, now seen corresponding path program 243 times [2021-08-21 12:06:43,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:43,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946498085] [2021-08-21 12:06:43,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:43,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:43,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:43,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946498085] [2021-08-21 12:06:43,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946498085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:43,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581948659] [2021-08-21 12:06:43,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:06:43,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:43,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:43,227 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:43,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2021-08-21 12:06:46,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:06:46,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:46,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:06:46,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:46,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581948659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:46,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:46,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-08-21 12:06:46,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931712810] [2021-08-21 12:06:46,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:06:46,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:46,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:06:46,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:06:46,521 INFO L87 Difference]: Start difference. First operand 4825 states and 15069 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:47,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:47,129 INFO L93 Difference]: Finished difference Result 5908 states and 17767 transitions. [2021-08-21 12:06:47,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 12:06:47,130 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:47,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:47,139 INFO L225 Difference]: With dead ends: 5908 [2021-08-21 12:06:47,140 INFO L226 Difference]: Without dead ends: 5908 [2021-08-21 12:06:47,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 476.7ms TimeCoverageRelationStatistics Valid=1109, Invalid=1971, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 12:06:47,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5908 states. [2021-08-21 12:06:47,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5908 to 4874. [2021-08-21 12:06:47,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4874 states, 4873 states have (on average 3.1329776318489637) internal successors, (15267), 4873 states have internal predecessors, (15267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:47,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4874 states to 4874 states and 15267 transitions. [2021-08-21 12:06:47,222 INFO L78 Accepts]: Start accepts. Automaton has 4874 states and 15267 transitions. Word has length 22 [2021-08-21 12:06:47,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:47,223 INFO L470 AbstractCegarLoop]: Abstraction has 4874 states and 15267 transitions. [2021-08-21 12:06:47,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:47,223 INFO L276 IsEmpty]: Start isEmpty. Operand 4874 states and 15267 transitions. [2021-08-21 12:06:47,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:47,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:47,229 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:47,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2021-08-21 12:06:47,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-08-21 12:06:47,430 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:47,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:47,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1374715229, now seen corresponding path program 244 times [2021-08-21 12:06:47,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:47,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155209394] [2021-08-21 12:06:47,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:47,431 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:47,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:47,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155209394] [2021-08-21 12:06:47,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155209394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:47,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597087273] [2021-08-21 12:06:47,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:06:47,531 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:47,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:47,532 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:47,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2021-08-21 12:06:50,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:06:50,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:50,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:06:50,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:50,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597087273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:50,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:50,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-08-21 12:06:50,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917905298] [2021-08-21 12:06:50,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:06:50,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:50,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:06:50,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:06:50,642 INFO L87 Difference]: Start difference. First operand 4874 states and 15267 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:51,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:51,346 INFO L93 Difference]: Finished difference Result 5619 states and 16921 transitions. [2021-08-21 12:06:51,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 12:06:51,347 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:51,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:51,356 INFO L225 Difference]: With dead ends: 5619 [2021-08-21 12:06:51,356 INFO L226 Difference]: Without dead ends: 5607 [2021-08-21 12:06:51,357 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 598.4ms TimeCoverageRelationStatistics Valid=1461, Invalid=2961, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 12:06:51,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5607 states. [2021-08-21 12:06:51,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5607 to 4673. [2021-08-21 12:06:51,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4673 states, 4672 states have (on average 3.120291095890411) internal successors, (14578), 4672 states have internal predecessors, (14578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:51,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4673 states to 4673 states and 14578 transitions. [2021-08-21 12:06:51,439 INFO L78 Accepts]: Start accepts. Automaton has 4673 states and 14578 transitions. Word has length 22 [2021-08-21 12:06:51,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:51,439 INFO L470 AbstractCegarLoop]: Abstraction has 4673 states and 14578 transitions. [2021-08-21 12:06:51,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:51,439 INFO L276 IsEmpty]: Start isEmpty. Operand 4673 states and 14578 transitions. [2021-08-21 12:06:51,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:51,445 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:51,445 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:51,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Ended with exit code 0 [2021-08-21 12:06:51,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:51,646 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:51,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:51,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1909945031, now seen corresponding path program 245 times [2021-08-21 12:06:51,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:51,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273245620] [2021-08-21 12:06:51,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:51,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:51,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:51,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273245620] [2021-08-21 12:06:51,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273245620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:51,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731904713] [2021-08-21 12:06:51,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:06:51,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:51,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:51,723 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:51,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2021-08-21 12:06:54,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:06:54,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:54,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:06:54,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:54,842 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:54,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731904713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:54,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:54,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-08-21 12:06:54,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054849700] [2021-08-21 12:06:54,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:06:54,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:54,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:06:54,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:06:54,843 INFO L87 Difference]: Start difference. First operand 4673 states and 14578 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 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 12:06:55,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:55,483 INFO L93 Difference]: Finished difference Result 5350 states and 16179 transitions. [2021-08-21 12:06:55,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 12:06:55,484 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 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 22 [2021-08-21 12:06:55,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:55,492 INFO L225 Difference]: With dead ends: 5350 [2021-08-21 12:06:55,492 INFO L226 Difference]: Without dead ends: 5338 [2021-08-21 12:06:55,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 548.7ms TimeCoverageRelationStatistics Valid=1464, Invalid=3092, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 12:06:55,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5338 states. [2021-08-21 12:06:55,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5338 to 4703. [2021-08-21 12:06:55,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4703 states, 4702 states have (on average 3.1207996597192684) internal successors, (14674), 4702 states have internal predecessors, (14674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:55,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 14674 transitions. [2021-08-21 12:06:55,568 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 14674 transitions. Word has length 22 [2021-08-21 12:06:55,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:55,568 INFO L470 AbstractCegarLoop]: Abstraction has 4703 states and 14674 transitions. [2021-08-21 12:06:55,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 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 12:06:55,568 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 14674 transitions. [2021-08-21 12:06:55,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:55,575 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:55,575 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:55,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Ended with exit code 0 [2021-08-21 12:06:55,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-08-21 12:06:55,776 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:55,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:55,776 INFO L82 PathProgramCache]: Analyzing trace with hash 551932499, now seen corresponding path program 246 times [2021-08-21 12:06:55,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:55,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285958841] [2021-08-21 12:06:55,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:55,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:55,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:55,854 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:55,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:55,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285958841] [2021-08-21 12:06:55,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285958841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:55,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971711012] [2021-08-21 12:06:55,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:06:55,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:55,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:55,855 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:55,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2021-08-21 12:06:58,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:06:58,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:58,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:06:58,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:59,000 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:59,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971711012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:59,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:59,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-08-21 12:06:59,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066755235] [2021-08-21 12:06:59,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:06:59,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:59,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:06:59,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:06:59,001 INFO L87 Difference]: Start difference. First operand 4703 states and 14674 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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 12:06:59,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:59,526 INFO L93 Difference]: Finished difference Result 5100 states and 15587 transitions. [2021-08-21 12:06:59,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 12:06:59,526 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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 22 [2021-08-21 12:06:59,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:59,535 INFO L225 Difference]: With dead ends: 5100 [2021-08-21 12:06:59,535 INFO L226 Difference]: Without dead ends: 5100 [2021-08-21 12:06:59,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 452.5ms TimeCoverageRelationStatistics Valid=907, Invalid=2063, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 12:06:59,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5100 states. [2021-08-21 12:06:59,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5100 to 4687. [2021-08-21 12:06:59,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4687 states, 4686 states have (on average 3.120998719590269) internal successors, (14625), 4686 states have internal predecessors, (14625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:59,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 14625 transitions. [2021-08-21 12:06:59,610 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 14625 transitions. Word has length 22 [2021-08-21 12:06:59,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:59,610 INFO L470 AbstractCegarLoop]: Abstraction has 4687 states and 14625 transitions. [2021-08-21 12:06:59,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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 12:06:59,610 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 14625 transitions. [2021-08-21 12:06:59,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:59,617 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:59,617 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:59,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Ended with exit code 0 [2021-08-21 12:06:59,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-08-21 12:06:59,818 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:59,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:59,818 INFO L82 PathProgramCache]: Analyzing trace with hash -666976565, now seen corresponding path program 247 times [2021-08-21 12:06:59,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:59,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097914025] [2021-08-21 12:06:59,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:59,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:59,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:59,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:59,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097914025] [2021-08-21 12:06:59,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097914025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:59,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493527519] [2021-08-21 12:06:59,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:06:59,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:59,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:59,889 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:59,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2021-08-21 12:07:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:02,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:07:02,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:03,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493527519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:03,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:03,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-08-21 12:07:03,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113328526] [2021-08-21 12:07:03,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:07:03,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:03,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:07:03,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:07:03,043 INFO L87 Difference]: Start difference. First operand 4687 states and 14625 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:03,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:03,503 INFO L93 Difference]: Finished difference Result 5184 states and 15752 transitions. [2021-08-21 12:07:03,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 12:07:03,503 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:03,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:03,511 INFO L225 Difference]: With dead ends: 5184 [2021-08-21 12:07:03,511 INFO L226 Difference]: Without dead ends: 5174 [2021-08-21 12:07:03,512 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 394.1ms TimeCoverageRelationStatistics Valid=713, Invalid=1639, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:07:03,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5174 states. [2021-08-21 12:07:03,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5174 to 4685. [2021-08-21 12:07:03,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4685 states, 4684 states have (on average 3.1195559350982065) internal successors, (14612), 4684 states have internal predecessors, (14612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:03,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4685 states to 4685 states and 14612 transitions. [2021-08-21 12:07:03,581 INFO L78 Accepts]: Start accepts. Automaton has 4685 states and 14612 transitions. Word has length 22 [2021-08-21 12:07:03,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:03,581 INFO L470 AbstractCegarLoop]: Abstraction has 4685 states and 14612 transitions. [2021-08-21 12:07:03,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:03,582 INFO L276 IsEmpty]: Start isEmpty. Operand 4685 states and 14612 transitions. [2021-08-21 12:07:03,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:03,588 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:03,588 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:03,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:03,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-08-21 12:07:03,789 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:03,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:03,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1537580205, now seen corresponding path program 248 times [2021-08-21 12:07:03,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:03,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172470742] [2021-08-21 12:07:03,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:03,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:03,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:03,852 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:03,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:03,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172470742] [2021-08-21 12:07:03,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172470742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:03,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208760508] [2021-08-21 12:07:03,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:07:03,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:03,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:03,853 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:03,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2021-08-21 12:07:06,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:07:06,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:06,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:07:06,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:07,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208760508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:07,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:07,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-08-21 12:07:07,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219529682] [2021-08-21 12:07:07,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:07:07,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:07,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:07:07,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:07:07,024 INFO L87 Difference]: Start difference. First operand 4685 states and 14612 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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 12:07:07,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:07,521 INFO L93 Difference]: Finished difference Result 5658 states and 17075 transitions. [2021-08-21 12:07:07,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 12:07:07,521 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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 22 [2021-08-21 12:07:07,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:07,530 INFO L225 Difference]: With dead ends: 5658 [2021-08-21 12:07:07,530 INFO L226 Difference]: Without dead ends: 5652 [2021-08-21 12:07:07,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 388.7ms TimeCoverageRelationStatistics Valid=760, Invalid=1592, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:07:07,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5652 states. [2021-08-21 12:07:07,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5652 to 4809. [2021-08-21 12:07:07,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4809 states, 4808 states have (on average 3.117512479201331) internal successors, (14989), 4808 states have internal predecessors, (14989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:07,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4809 states to 4809 states and 14989 transitions. [2021-08-21 12:07:07,601 INFO L78 Accepts]: Start accepts. Automaton has 4809 states and 14989 transitions. Word has length 22 [2021-08-21 12:07:07,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:07,601 INFO L470 AbstractCegarLoop]: Abstraction has 4809 states and 14989 transitions. [2021-08-21 12:07:07,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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 12:07:07,601 INFO L276 IsEmpty]: Start isEmpty. Operand 4809 states and 14989 transitions. [2021-08-21 12:07:07,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:07,608 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:07,608 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:07,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Ended with exit code 0 [2021-08-21 12:07:07,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:07,808 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:07,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:07,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1150022197, now seen corresponding path program 249 times [2021-08-21 12:07:07,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:07,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583267485] [2021-08-21 12:07:07,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:07,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:07,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:07,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583267485] [2021-08-21 12:07:07,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583267485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:07,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378746727] [2021-08-21 12:07:07,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:07:07,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:07,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:07,872 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:07,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2021-08-21 12:07:10,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:07:10,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:10,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:07:10,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:11,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378746727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:11,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:11,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-08-21 12:07:11,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659592253] [2021-08-21 12:07:11,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:07:11,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:11,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:07:11,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:07:11,053 INFO L87 Difference]: Start difference. First operand 4809 states and 14989 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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 12:07:11,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:11,573 INFO L93 Difference]: Finished difference Result 5753 states and 17358 transitions. [2021-08-21 12:07:11,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 12:07:11,573 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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 22 [2021-08-21 12:07:11,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:11,582 INFO L225 Difference]: With dead ends: 5753 [2021-08-21 12:07:11,582 INFO L226 Difference]: Without dead ends: 5749 [2021-08-21 12:07:11,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 406.2ms TimeCoverageRelationStatistics Valid=805, Invalid=1547, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:07:11,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5749 states. [2021-08-21 12:07:11,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5749 to 4843. [2021-08-21 12:07:11,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4843 states, 4842 states have (on average 3.117513424204874) internal successors, (15095), 4842 states have internal predecessors, (15095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:11,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4843 states to 4843 states and 15095 transitions. [2021-08-21 12:07:11,661 INFO L78 Accepts]: Start accepts. Automaton has 4843 states and 15095 transitions. Word has length 22 [2021-08-21 12:07:11,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:11,661 INFO L470 AbstractCegarLoop]: Abstraction has 4843 states and 15095 transitions. [2021-08-21 12:07:11,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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 12:07:11,662 INFO L276 IsEmpty]: Start isEmpty. Operand 4843 states and 15095 transitions. [2021-08-21 12:07:11,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:11,668 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:11,668 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:11,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Ended with exit code 0 [2021-08-21 12:07:11,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:11,869 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:11,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:11,869 INFO L82 PathProgramCache]: Analyzing trace with hash -306236333, now seen corresponding path program 250 times [2021-08-21 12:07:11,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:11,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404059584] [2021-08-21 12:07:11,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:11,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:11,933 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:11,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:11,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404059584] [2021-08-21 12:07:11,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404059584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:11,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336182662] [2021-08-21 12:07:11,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:07:11,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:11,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:11,935 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:11,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2021-08-21 12:07:15,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:07:15,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:15,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:07:15,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:15,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336182662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:15,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:15,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-08-21 12:07:15,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057601064] [2021-08-21 12:07:15,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:07:15,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:15,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:07:15,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:07:15,147 INFO L87 Difference]: Start difference. First operand 4843 states and 15095 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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 12:07:15,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:15,713 INFO L93 Difference]: Finished difference Result 6063 states and 18166 transitions. [2021-08-21 12:07:15,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 12:07:15,713 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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 22 [2021-08-21 12:07:15,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:15,723 INFO L225 Difference]: With dead ends: 6063 [2021-08-21 12:07:15,724 INFO L226 Difference]: Without dead ends: 6063 [2021-08-21 12:07:15,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 458.4ms TimeCoverageRelationStatistics Valid=1038, Invalid=1824, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 12:07:15,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2021-08-21 12:07:15,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 4876. [2021-08-21 12:07:15,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4876 states, 4875 states have (on average 3.125948717948718) internal successors, (15239), 4875 states have internal predecessors, (15239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:15,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4876 states to 4876 states and 15239 transitions. [2021-08-21 12:07:15,806 INFO L78 Accepts]: Start accepts. Automaton has 4876 states and 15239 transitions. Word has length 22 [2021-08-21 12:07:15,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:15,806 INFO L470 AbstractCegarLoop]: Abstraction has 4876 states and 15239 transitions. [2021-08-21 12:07:15,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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 12:07:15,807 INFO L276 IsEmpty]: Start isEmpty. Operand 4876 states and 15239 transitions. [2021-08-21 12:07:15,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:15,814 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:15,814 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:15,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:16,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:16,015 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:16,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:16,015 INFO L82 PathProgramCache]: Analyzing trace with hash 265218473, now seen corresponding path program 251 times [2021-08-21 12:07:16,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:16,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486055594] [2021-08-21 12:07:16,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:16,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:16,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:16,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486055594] [2021-08-21 12:07:16,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486055594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:16,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325012719] [2021-08-21 12:07:16,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:07:16,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:16,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:16,081 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:16,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2021-08-21 12:07:19,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:07:19,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:19,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:07:19,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:19,288 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:19,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325012719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:19,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:19,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-08-21 12:07:19,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639400398] [2021-08-21 12:07:19,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:07:19,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:19,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:07:19,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:07:19,289 INFO L87 Difference]: Start difference. First operand 4876 states and 15239 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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 12:07:20,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:20,017 INFO L93 Difference]: Finished difference Result 5817 states and 17445 transitions. [2021-08-21 12:07:20,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-21 12:07:20,018 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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 22 [2021-08-21 12:07:20,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:20,027 INFO L225 Difference]: With dead ends: 5817 [2021-08-21 12:07:20,027 INFO L226 Difference]: Without dead ends: 5808 [2021-08-21 12:07:20,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 602.9ms TimeCoverageRelationStatistics Valid=1537, Invalid=3293, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 12:07:20,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2021-08-21 12:07:20,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 4799. [2021-08-21 12:07:20,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4799 states, 4798 states have (on average 3.1192163401417257) internal successors, (14966), 4798 states have internal predecessors, (14966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:20,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4799 states to 4799 states and 14966 transitions. [2021-08-21 12:07:20,107 INFO L78 Accepts]: Start accepts. Automaton has 4799 states and 14966 transitions. Word has length 22 [2021-08-21 12:07:20,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:20,107 INFO L470 AbstractCegarLoop]: Abstraction has 4799 states and 14966 transitions. [2021-08-21 12:07:20,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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 12:07:20,108 INFO L276 IsEmpty]: Start isEmpty. Operand 4799 states and 14966 transitions. [2021-08-21 12:07:20,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:20,114 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:20,114 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:20,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:20,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:20,315 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:20,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:20,315 INFO L82 PathProgramCache]: Analyzing trace with hash 800448275, now seen corresponding path program 252 times [2021-08-21 12:07:20,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:20,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021453753] [2021-08-21 12:07:20,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:20,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:20,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:20,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021453753] [2021-08-21 12:07:20,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021453753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:20,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067625297] [2021-08-21 12:07:20,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:07:20,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:20,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:20,397 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:20,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2021-08-21 12:07:23,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:07:23,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:23,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:07:23,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:23,625 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:23,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067625297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:23,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:23,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-08-21 12:07:23,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377238999] [2021-08-21 12:07:23,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:07:23,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:23,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:07:23,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:07:23,626 INFO L87 Difference]: Start difference. First operand 4799 states and 14966 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:24,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:24,334 INFO L93 Difference]: Finished difference Result 5773 states and 17293 transitions. [2021-08-21 12:07:24,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 12:07:24,334 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:24,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:24,344 INFO L225 Difference]: With dead ends: 5773 [2021-08-21 12:07:24,344 INFO L226 Difference]: Without dead ends: 5755 [2021-08-21 12:07:24,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 601.2ms TimeCoverageRelationStatistics Valid=1436, Invalid=3256, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 12:07:24,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5755 states. [2021-08-21 12:07:24,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5755 to 4708. [2021-08-21 12:07:24,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4708 states, 4707 states have (on average 3.11897174421075) internal successors, (14681), 4707 states have internal predecessors, (14681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:24,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4708 states to 4708 states and 14681 transitions. [2021-08-21 12:07:24,423 INFO L78 Accepts]: Start accepts. Automaton has 4708 states and 14681 transitions. Word has length 22 [2021-08-21 12:07:24,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:24,423 INFO L470 AbstractCegarLoop]: Abstraction has 4708 states and 14681 transitions. [2021-08-21 12:07:24,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:24,423 INFO L276 IsEmpty]: Start isEmpty. Operand 4708 states and 14681 transitions. [2021-08-21 12:07:24,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:24,429 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:24,429 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:24,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2021-08-21 12:07:24,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-08-21 12:07:24,630 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:24,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:24,630 INFO L82 PathProgramCache]: Analyzing trace with hash 212702953, now seen corresponding path program 253 times [2021-08-21 12:07:24,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:24,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344004694] [2021-08-21 12:07:24,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:24,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:24,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:24,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:24,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344004694] [2021-08-21 12:07:24,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344004694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:24,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944913681] [2021-08-21 12:07:24,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:07:24,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:24,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:24,709 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:24,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2021-08-21 12:07:27,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:27,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:07:27,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:27,928 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:27,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944913681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:27,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:27,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-08-21 12:07:27,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198869575] [2021-08-21 12:07:27,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:07:27,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:27,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:07:27,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:07:27,929 INFO L87 Difference]: Start difference. First operand 4708 states and 14681 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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 12:07:28,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:28,559 INFO L93 Difference]: Finished difference Result 5582 states and 16822 transitions. [2021-08-21 12:07:28,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-21 12:07:28,560 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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 22 [2021-08-21 12:07:28,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:28,569 INFO L225 Difference]: With dead ends: 5582 [2021-08-21 12:07:28,569 INFO L226 Difference]: Without dead ends: 5564 [2021-08-21 12:07:28,570 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 549.3ms TimeCoverageRelationStatistics Valid=1406, Invalid=3286, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 12:07:28,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5564 states. [2021-08-21 12:07:28,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5564 to 4728. [2021-08-21 12:07:28,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4728 states, 4727 states have (on average 3.119737677173683) internal successors, (14747), 4727 states have internal predecessors, (14747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:28,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4728 states to 4728 states and 14747 transitions. [2021-08-21 12:07:28,646 INFO L78 Accepts]: Start accepts. Automaton has 4728 states and 14747 transitions. Word has length 22 [2021-08-21 12:07:28,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:28,646 INFO L470 AbstractCegarLoop]: Abstraction has 4728 states and 14747 transitions. [2021-08-21 12:07:28,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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 12:07:28,646 INFO L276 IsEmpty]: Start isEmpty. Operand 4728 states and 14747 transitions. [2021-08-21 12:07:28,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:28,653 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:28,653 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:28,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Ended with exit code 0 [2021-08-21 12:07:28,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:28,854 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:28,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:28,854 INFO L82 PathProgramCache]: Analyzing trace with hash -2041196153, now seen corresponding path program 254 times [2021-08-21 12:07:28,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:28,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211039257] [2021-08-21 12:07:28,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:28,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:28,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:28,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211039257] [2021-08-21 12:07:28,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211039257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:28,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272754933] [2021-08-21 12:07:28,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:07:28,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:28,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:28,933 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:28,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2021-08-21 12:07:32,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:07:32,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:32,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:07:32,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:32,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272754933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:32,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:32,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 12:07:32,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494789249] [2021-08-21 12:07:32,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:07:32,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:32,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:07:32,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:07:32,194 INFO L87 Difference]: Start difference. First operand 4728 states and 14747 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:32,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:32,788 INFO L93 Difference]: Finished difference Result 5063 states and 15470 transitions. [2021-08-21 12:07:32,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:07:32,788 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:32,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:32,797 INFO L225 Difference]: With dead ends: 5063 [2021-08-21 12:07:32,797 INFO L226 Difference]: Without dead ends: 5063 [2021-08-21 12:07:32,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 515.7ms TimeCoverageRelationStatistics Valid=1006, Invalid=2416, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 12:07:32,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5063 states. [2021-08-21 12:07:32,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5063 to 4692. [2021-08-21 12:07:32,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4692 states, 4691 states have (on average 3.118311660626732) internal successors, (14628), 4691 states have internal predecessors, (14628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:32,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4692 states to 4692 states and 14628 transitions. [2021-08-21 12:07:32,867 INFO L78 Accepts]: Start accepts. Automaton has 4692 states and 14628 transitions. Word has length 22 [2021-08-21 12:07:32,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:32,868 INFO L470 AbstractCegarLoop]: Abstraction has 4692 states and 14628 transitions. [2021-08-21 12:07:32,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:32,868 INFO L276 IsEmpty]: Start isEmpty. Operand 4692 states and 14628 transitions. [2021-08-21 12:07:32,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:32,874 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:32,874 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:32,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:33,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-08-21 12:07:33,075 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:33,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:33,075 INFO L82 PathProgramCache]: Analyzing trace with hash 517271431, now seen corresponding path program 255 times [2021-08-21 12:07:33,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:33,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883872360] [2021-08-21 12:07:33,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:33,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:33,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:33,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:33,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883872360] [2021-08-21 12:07:33,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883872360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:33,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375503164] [2021-08-21 12:07:33,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:07:33,144 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:33,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:33,145 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:33,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2021-08-21 12:07:36,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:07:36,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:36,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:07:36,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:36,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375503164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:36,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:36,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-08-21 12:07:36,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188857441] [2021-08-21 12:07:36,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:07:36,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:36,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:07:36,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:07:36,384 INFO L87 Difference]: Start difference. First operand 4692 states and 14628 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:36,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:36,968 INFO L93 Difference]: Finished difference Result 5220 states and 15784 transitions. [2021-08-21 12:07:36,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 12:07:36,969 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:36,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:36,977 INFO L225 Difference]: With dead ends: 5220 [2021-08-21 12:07:36,977 INFO L226 Difference]: Without dead ends: 5210 [2021-08-21 12:07:36,977 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 495.0ms TimeCoverageRelationStatistics Valid=809, Invalid=1947, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 12:07:36,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5210 states. [2021-08-21 12:07:37,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5210 to 4589. [2021-08-21 12:07:37,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4589 states, 4588 states have (on average 3.1200959023539667) internal successors, (14315), 4588 states have internal predecessors, (14315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:37,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4589 states to 4589 states and 14315 transitions. [2021-08-21 12:07:37,042 INFO L78 Accepts]: Start accepts. Automaton has 4589 states and 14315 transitions. Word has length 22 [2021-08-21 12:07:37,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:37,042 INFO L470 AbstractCegarLoop]: Abstraction has 4589 states and 14315 transitions. [2021-08-21 12:07:37,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:37,042 INFO L276 IsEmpty]: Start isEmpty. Operand 4589 states and 14315 transitions. [2021-08-21 12:07:37,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:37,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:37,048 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:37,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Ended with exit code 0 [2021-08-21 12:07:37,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-08-21 12:07:37,249 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:37,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:37,249 INFO L82 PathProgramCache]: Analyzing trace with hash 184160647, now seen corresponding path program 256 times [2021-08-21 12:07:37,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:37,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331068281] [2021-08-21 12:07:37,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:37,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:37,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:37,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331068281] [2021-08-21 12:07:37,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331068281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:37,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649995190] [2021-08-21 12:07:37,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:07:37,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:37,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:37,312 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:37,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2021-08-21 12:07:40,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:07:40,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:40,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:07:40,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:40,493 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:40,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649995190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:40,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:40,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-08-21 12:07:40,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353248755] [2021-08-21 12:07:40,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:07:40,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:40,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:07:40,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:07:40,494 INFO L87 Difference]: Start difference. First operand 4589 states and 14315 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:41,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:41,074 INFO L93 Difference]: Finished difference Result 5724 states and 17179 transitions. [2021-08-21 12:07:41,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 12:07:41,074 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:41,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:41,083 INFO L225 Difference]: With dead ends: 5724 [2021-08-21 12:07:41,083 INFO L226 Difference]: Without dead ends: 5718 [2021-08-21 12:07:41,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 462.2ms TimeCoverageRelationStatistics Valid=801, Invalid=1749, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 12:07:41,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5718 states. [2021-08-21 12:07:41,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5718 to 4609. [2021-08-21 12:07:41,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4609 states, 4608 states have (on average 3.118923611111111) internal successors, (14372), 4608 states have internal predecessors, (14372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:41,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4609 states to 4609 states and 14372 transitions. [2021-08-21 12:07:41,159 INFO L78 Accepts]: Start accepts. Automaton has 4609 states and 14372 transitions. Word has length 22 [2021-08-21 12:07:41,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:41,159 INFO L470 AbstractCegarLoop]: Abstraction has 4609 states and 14372 transitions. [2021-08-21 12:07:41,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:41,160 INFO L276 IsEmpty]: Start isEmpty. Operand 4609 states and 14372 transitions. [2021-08-21 12:07:41,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:41,166 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:41,166 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:41,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:41,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-08-21 12:07:41,366 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:41,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:41,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1420341127, now seen corresponding path program 257 times [2021-08-21 12:07:41,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:41,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597590001] [2021-08-21 12:07:41,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:41,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:41,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:41,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:41,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597590001] [2021-08-21 12:07:41,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597590001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:41,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121419699] [2021-08-21 12:07:41,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:07:41,427 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:41,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:41,428 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:41,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2021-08-21 12:07:44,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:07:44,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:44,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:07:44,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:44,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121419699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:44,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:44,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-08-21 12:07:44,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363743537] [2021-08-21 12:07:44,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:07:44,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:44,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:07:44,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:07:44,618 INFO L87 Difference]: Start difference. First operand 4609 states and 14372 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:45,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:45,191 INFO L93 Difference]: Finished difference Result 6302 states and 18942 transitions. [2021-08-21 12:07:45,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:07:45,191 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:45,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:45,201 INFO L225 Difference]: With dead ends: 6302 [2021-08-21 12:07:45,202 INFO L226 Difference]: Without dead ends: 6300 [2021-08-21 12:07:45,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 465.0ms TimeCoverageRelationStatistics Valid=834, Invalid=1616, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 12:07:45,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6300 states. [2021-08-21 12:07:45,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6300 to 4905. [2021-08-21 12:07:45,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4905 states, 4904 states have (on average 3.1176590538336053) internal successors, (15289), 4904 states have internal predecessors, (15289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:45,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 15289 transitions. [2021-08-21 12:07:45,282 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 15289 transitions. Word has length 22 [2021-08-21 12:07:45,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:45,282 INFO L470 AbstractCegarLoop]: Abstraction has 4905 states and 15289 transitions. [2021-08-21 12:07:45,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:45,282 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 15289 transitions. [2021-08-21 12:07:45,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:45,289 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:45,289 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:45,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Ended with exit code 0 [2021-08-21 12:07:45,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-08-21 12:07:45,490 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:45,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:45,490 INFO L82 PathProgramCache]: Analyzing trace with hash -340897401, now seen corresponding path program 258 times [2021-08-21 12:07:45,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:45,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436891872] [2021-08-21 12:07:45,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:45,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:45,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:45,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:45,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436891872] [2021-08-21 12:07:45,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436891872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:45,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400364427] [2021-08-21 12:07:45,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:07:45,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:45,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:45,559 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:45,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2021-08-21 12:07:48,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:07:48,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:48,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:07:48,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:48,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400364427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:48,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:48,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-08-21 12:07:48,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380716172] [2021-08-21 12:07:48,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:07:48,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:48,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:07:48,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:07:48,778 INFO L87 Difference]: Start difference. First operand 4905 states and 15289 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:49,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:49,325 INFO L93 Difference]: Finished difference Result 6307 states and 18845 transitions. [2021-08-21 12:07:49,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 12:07:49,325 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:49,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:49,335 INFO L225 Difference]: With dead ends: 6307 [2021-08-21 12:07:49,336 INFO L226 Difference]: Without dead ends: 6307 [2021-08-21 12:07:49,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 438.9ms TimeCoverageRelationStatistics Valid=966, Invalid=1686, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 12:07:49,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6307 states. [2021-08-21 12:07:49,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6307 to 5098. [2021-08-21 12:07:49,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5098 states, 5097 states have (on average 3.1271336080047085) internal successors, (15939), 5097 states have internal predecessors, (15939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:49,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5098 states to 5098 states and 15939 transitions. [2021-08-21 12:07:49,467 INFO L78 Accepts]: Start accepts. Automaton has 5098 states and 15939 transitions. Word has length 22 [2021-08-21 12:07:49,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:49,467 INFO L470 AbstractCegarLoop]: Abstraction has 5098 states and 15939 transitions. [2021-08-21 12:07:49,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:49,467 INFO L276 IsEmpty]: Start isEmpty. Operand 5098 states and 15939 transitions. [2021-08-21 12:07:49,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:49,474 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:49,474 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:49,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Ended with exit code 0 [2021-08-21 12:07:49,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:49,675 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:49,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:49,675 INFO L82 PathProgramCache]: Analyzing trace with hash 230557405, now seen corresponding path program 259 times [2021-08-21 12:07:49,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:49,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788155363] [2021-08-21 12:07:49,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:49,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:49,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:49,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788155363] [2021-08-21 12:07:49,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788155363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:49,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560190644] [2021-08-21 12:07:49,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:07:49,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:49,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:49,735 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:49,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2021-08-21 12:07:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:52,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:07:52,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:52,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560190644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:52,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:52,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-08-21 12:07:52,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939462175] [2021-08-21 12:07:52,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:07:52,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:52,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:07:52,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:07:52,995 INFO L87 Difference]: Start difference. First operand 5098 states and 15939 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:53,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:53,826 INFO L93 Difference]: Finished difference Result 6203 states and 18588 transitions. [2021-08-21 12:07:53,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-21 12:07:53,826 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:53,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:53,837 INFO L225 Difference]: With dead ends: 6203 [2021-08-21 12:07:53,837 INFO L226 Difference]: Without dead ends: 6194 [2021-08-21 12:07:53,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 693.6ms TimeCoverageRelationStatistics Valid=1706, Invalid=3844, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 12:07:53,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6194 states. [2021-08-21 12:07:53,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6194 to 5023. [2021-08-21 12:07:53,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5023 states, 5022 states have (on average 3.122859418558343) internal successors, (15683), 5022 states have internal predecessors, (15683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:53,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5023 states to 5023 states and 15683 transitions. [2021-08-21 12:07:53,968 INFO L78 Accepts]: Start accepts. Automaton has 5023 states and 15683 transitions. Word has length 22 [2021-08-21 12:07:53,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:53,968 INFO L470 AbstractCegarLoop]: Abstraction has 5023 states and 15683 transitions. [2021-08-21 12:07:53,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:53,968 INFO L276 IsEmpty]: Start isEmpty. Operand 5023 states and 15683 transitions. [2021-08-21 12:07:53,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:53,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:53,975 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:54,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Ended with exit code 0 [2021-08-21 12:07:54,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:54,176 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:54,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:54,176 INFO L82 PathProgramCache]: Analyzing trace with hash 765787207, now seen corresponding path program 260 times [2021-08-21 12:07:54,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:54,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173766649] [2021-08-21 12:07:54,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:54,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:54,244 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:54,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:54,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173766649] [2021-08-21 12:07:54,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173766649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:54,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369971795] [2021-08-21 12:07:54,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:07:54,245 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:54,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:54,246 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:54,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2021-08-21 12:07:57,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:07:57,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:57,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:07:57,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:57,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369971795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:57,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:57,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-08-21 12:07:57,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95505540] [2021-08-21 12:07:57,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:07:57,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:57,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:07:57,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:07:57,481 INFO L87 Difference]: Start difference. First operand 5023 states and 15683 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:58,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:58,226 INFO L93 Difference]: Finished difference Result 6188 states and 18528 transitions. [2021-08-21 12:07:58,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-21 12:07:58,226 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:58,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:58,237 INFO L225 Difference]: With dead ends: 6188 [2021-08-21 12:07:58,237 INFO L226 Difference]: Without dead ends: 6176 [2021-08-21 12:07:58,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 637.9ms TimeCoverageRelationStatistics Valid=1503, Invalid=3609, Unknown=0, NotChecked=0, Total=5112 [2021-08-21 12:07:58,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6176 states. [2021-08-21 12:07:58,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6176 to 5007. [2021-08-21 12:07:58,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5007 states, 5006 states have (on average 3.1220535357570913) internal successors, (15629), 5006 states have internal predecessors, (15629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:58,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5007 states to 5007 states and 15629 transitions. [2021-08-21 12:07:58,372 INFO L78 Accepts]: Start accepts. Automaton has 5007 states and 15629 transitions. Word has length 22 [2021-08-21 12:07:58,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:58,372 INFO L470 AbstractCegarLoop]: Abstraction has 5007 states and 15629 transitions. [2021-08-21 12:07:58,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:58,372 INFO L276 IsEmpty]: Start isEmpty. Operand 5007 states and 15629 transitions. [2021-08-21 12:07:58,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:58,379 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:58,379 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:58,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Ended with exit code 0 [2021-08-21 12:07:58,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:58,580 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:58,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:58,580 INFO L82 PathProgramCache]: Analyzing trace with hash 178041885, now seen corresponding path program 261 times [2021-08-21 12:07:58,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:58,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881290284] [2021-08-21 12:07:58,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:58,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:58,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:58,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881290284] [2021-08-21 12:07:58,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881290284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:58,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127601426] [2021-08-21 12:07:58,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:07:58,652 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:58,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:58,653 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:58,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2021-08-21 12:08:01,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:08:01,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:01,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:08:01,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:01,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127601426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:01,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:01,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-08-21 12:08:01,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680520368] [2021-08-21 12:08:01,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:08:01,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:01,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:08:01,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:08:01,881 INFO L87 Difference]: Start difference. First operand 5007 states and 15629 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:02,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:02,550 INFO L93 Difference]: Finished difference Result 6237 states and 18671 transitions. [2021-08-21 12:08:02,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 12:08:02,550 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:08:02,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:02,561 INFO L225 Difference]: With dead ends: 6237 [2021-08-21 12:08:02,561 INFO L226 Difference]: Without dead ends: 6219 [2021-08-21 12:08:02,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 593.4ms TimeCoverageRelationStatistics Valid=1373, Invalid=3457, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 12:08:02,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6219 states. [2021-08-21 12:08:02,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6219 to 5025. [2021-08-21 12:08:02,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5025 states, 5024 states have (on average 3.1240047770700636) internal successors, (15695), 5024 states have internal predecessors, (15695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:02,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5025 states to 5025 states and 15695 transitions. [2021-08-21 12:08:02,701 INFO L78 Accepts]: Start accepts. Automaton has 5025 states and 15695 transitions. Word has length 22 [2021-08-21 12:08:02,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:02,701 INFO L470 AbstractCegarLoop]: Abstraction has 5025 states and 15695 transitions. [2021-08-21 12:08:02,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:02,701 INFO L276 IsEmpty]: Start isEmpty. Operand 5025 states and 15695 transitions. [2021-08-21 12:08:02,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:02,707 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:02,707 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:02,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2021-08-21 12:08:02,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:02,908 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:02,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:02,908 INFO L82 PathProgramCache]: Analyzing trace with hash -862193913, now seen corresponding path program 262 times [2021-08-21 12:08:02,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:02,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571802790] [2021-08-21 12:08:02,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:02,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:02,985 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:02,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:02,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571802790] [2021-08-21 12:08:02,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571802790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:02,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543184545] [2021-08-21 12:08:02,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:08:02,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:02,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:02,986 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:02,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2021-08-21 12:08:06,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:08:06,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:06,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:08:06,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:06,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543184545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:06,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:06,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 12:08:06,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129685116] [2021-08-21 12:08:06,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:08:06,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:06,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:08:06,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:08:06,243 INFO L87 Difference]: Start difference. First operand 5025 states and 15695 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:06,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:06,858 INFO L93 Difference]: Finished difference Result 6089 states and 18341 transitions. [2021-08-21 12:08:06,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 12:08:06,858 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:08:06,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:06,869 INFO L225 Difference]: With dead ends: 6089 [2021-08-21 12:08:06,869 INFO L226 Difference]: Without dead ends: 6065 [2021-08-21 12:08:06,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 556.6ms TimeCoverageRelationStatistics Valid=1314, Invalid=3378, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 12:08:06,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6065 states. [2021-08-21 12:08:06,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6065 to 5048. [2021-08-21 12:08:06,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5048 states, 5047 states have (on average 3.125619179710719) internal successors, (15775), 5047 states have internal predecessors, (15775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:06,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5048 states to 5048 states and 15775 transitions. [2021-08-21 12:08:06,955 INFO L78 Accepts]: Start accepts. Automaton has 5048 states and 15775 transitions. Word has length 22 [2021-08-21 12:08:06,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:06,955 INFO L470 AbstractCegarLoop]: Abstraction has 5048 states and 15775 transitions. [2021-08-21 12:08:06,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:06,955 INFO L276 IsEmpty]: Start isEmpty. Operand 5048 states and 15775 transitions. [2021-08-21 12:08:06,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:06,962 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:06,962 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:06,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Ended with exit code 0 [2021-08-21 12:08:07,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2021-08-21 12:08:07,162 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:07,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:07,162 INFO L82 PathProgramCache]: Analyzing trace with hash -823805741, now seen corresponding path program 263 times [2021-08-21 12:08:07,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:07,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541296621] [2021-08-21 12:08:07,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:07,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:07,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:07,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:07,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541296621] [2021-08-21 12:08:07,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541296621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:07,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85821067] [2021-08-21 12:08:07,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:08:07,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:07,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:07,268 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:07,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2021-08-21 12:08:10,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:08:10,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:10,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:08:10,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:10,561 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:10,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85821067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:10,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:10,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 12:08:10,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229445508] [2021-08-21 12:08:10,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:08:10,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:10,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:08:10,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:08:10,562 INFO L87 Difference]: Start difference. First operand 5048 states and 15775 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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 12:08:11,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:11,204 INFO L93 Difference]: Finished difference Result 5685 states and 17310 transitions. [2021-08-21 12:08:11,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 12:08:11,204 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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 22 [2021-08-21 12:08:11,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:11,215 INFO L225 Difference]: With dead ends: 5685 [2021-08-21 12:08:11,215 INFO L226 Difference]: Without dead ends: 5685 [2021-08-21 12:08:11,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 559.3ms TimeCoverageRelationStatistics Valid=1082, Invalid=2700, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 12:08:11,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5685 states. [2021-08-21 12:08:11,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5685 to 5099. [2021-08-21 12:08:11,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5099 states, 5098 states have (on average 3.1196547665751275) internal successors, (15904), 5098 states have internal predecessors, (15904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:11,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5099 states to 5099 states and 15904 transitions. [2021-08-21 12:08:11,296 INFO L78 Accepts]: Start accepts. Automaton has 5099 states and 15904 transitions. Word has length 22 [2021-08-21 12:08:11,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:11,297 INFO L470 AbstractCegarLoop]: Abstraction has 5099 states and 15904 transitions. [2021-08-21 12:08:11,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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 12:08:11,297 INFO L276 IsEmpty]: Start isEmpty. Operand 5099 states and 15904 transitions. [2021-08-21 12:08:11,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:11,304 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:11,304 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:11,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2021-08-21 12:08:11,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:11,513 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:11,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:11,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1425746357, now seen corresponding path program 264 times [2021-08-21 12:08:11,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:11,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861025719] [2021-08-21 12:08:11,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:11,514 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:11,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:11,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861025719] [2021-08-21 12:08:11,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861025719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:11,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794196373] [2021-08-21 12:08:11,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:08:11,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:11,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:11,591 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:11,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2021-08-21 12:08:14,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:08:14,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:14,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:08:14,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:14,912 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:14,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794196373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:14,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:14,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-08-21 12:08:14,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173870919] [2021-08-21 12:08:14,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:08:14,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:14,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:08:14,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:08:14,913 INFO L87 Difference]: Start difference. First operand 5099 states and 15904 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 12:08:15,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:15,452 INFO L93 Difference]: Finished difference Result 6196 states and 18689 transitions. [2021-08-21 12:08:15,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 12:08:15,453 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 22 [2021-08-21 12:08:15,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:15,465 INFO L225 Difference]: With dead ends: 6196 [2021-08-21 12:08:15,465 INFO L226 Difference]: Without dead ends: 6196 [2021-08-21 12:08:15,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 481.2ms TimeCoverageRelationStatistics Valid=846, Invalid=2124, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 12:08:15,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6196 states. [2021-08-21 12:08:15,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6196 to 5243. [2021-08-21 12:08:15,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5243 states, 5242 states have (on average 3.119420068676078) internal successors, (16352), 5242 states have internal predecessors, (16352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:15,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5243 states to 5243 states and 16352 transitions. [2021-08-21 12:08:15,562 INFO L78 Accepts]: Start accepts. Automaton has 5243 states and 16352 transitions. Word has length 22 [2021-08-21 12:08:15,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:15,562 INFO L470 AbstractCegarLoop]: Abstraction has 5243 states and 16352 transitions. [2021-08-21 12:08:15,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 12:08:15,562 INFO L276 IsEmpty]: Start isEmpty. Operand 5243 states and 16352 transitions. [2021-08-21 12:08:15,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:15,570 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:15,570 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:15,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:15,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-08-21 12:08:15,770 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:15,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:15,770 INFO L82 PathProgramCache]: Analyzing trace with hash 2018519507, now seen corresponding path program 265 times [2021-08-21 12:08:15,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:15,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075918035] [2021-08-21 12:08:15,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:15,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:15,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:15,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:15,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075918035] [2021-08-21 12:08:15,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075918035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:15,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472701926] [2021-08-21 12:08:15,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:08:15,841 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:15,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:15,842 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:15,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2021-08-21 12:08:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:19,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:08:19,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:19,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472701926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:19,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:19,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-08-21 12:08:19,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910142149] [2021-08-21 12:08:19,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:08:19,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:19,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:08:19,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:08:19,175 INFO L87 Difference]: Start difference. First operand 5243 states and 16352 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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 12:08:19,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:19,733 INFO L93 Difference]: Finished difference Result 6611 states and 19949 transitions. [2021-08-21 12:08:19,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 12:08:19,734 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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 22 [2021-08-21 12:08:19,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:19,744 INFO L225 Difference]: With dead ends: 6611 [2021-08-21 12:08:19,745 INFO L226 Difference]: Without dead ends: 6611 [2021-08-21 12:08:19,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 459.9ms TimeCoverageRelationStatistics Valid=827, Invalid=1929, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 12:08:19,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6611 states. [2021-08-21 12:08:19,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6611 to 5413. [2021-08-21 12:08:19,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5413 states, 5412 states have (on average 3.1225055432372506) internal successors, (16899), 5412 states have internal predecessors, (16899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:19,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5413 states to 5413 states and 16899 transitions. [2021-08-21 12:08:19,836 INFO L78 Accepts]: Start accepts. Automaton has 5413 states and 16899 transitions. Word has length 22 [2021-08-21 12:08:19,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:19,836 INFO L470 AbstractCegarLoop]: Abstraction has 5413 states and 16899 transitions. [2021-08-21 12:08:19,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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 12:08:19,836 INFO L276 IsEmpty]: Start isEmpty. Operand 5413 states and 16899 transitions. [2021-08-21 12:08:19,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:19,843 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:19,843 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:19,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Ended with exit code 0 [2021-08-21 12:08:20,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-08-21 12:08:20,044 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:20,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:20,044 INFO L82 PathProgramCache]: Analyzing trace with hash -502774453, now seen corresponding path program 266 times [2021-08-21 12:08:20,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:20,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843028751] [2021-08-21 12:08:20,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:20,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:20,102 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:20,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:20,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843028751] [2021-08-21 12:08:20,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843028751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:20,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721660851] [2021-08-21 12:08:20,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:08:20,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:20,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:20,103 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:20,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2021-08-21 12:08:23,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:08:23,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:23,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:08:23,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:23,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721660851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:23,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:23,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-08-21 12:08:23,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635116747] [2021-08-21 12:08:23,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:08:23,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:23,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:08:23,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:08:23,464 INFO L87 Difference]: Start difference. First operand 5413 states and 16899 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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 12:08:24,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:24,020 INFO L93 Difference]: Finished difference Result 7182 states and 21641 transitions. [2021-08-21 12:08:24,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 12:08:24,021 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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 22 [2021-08-21 12:08:24,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:24,033 INFO L225 Difference]: With dead ends: 7182 [2021-08-21 12:08:24,033 INFO L226 Difference]: Without dead ends: 7182 [2021-08-21 12:08:24,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 455.5ms TimeCoverageRelationStatistics Valid=864, Invalid=1788, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 12:08:24,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7182 states. [2021-08-21 12:08:24,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7182 to 5709. [2021-08-21 12:08:24,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5709 states, 5708 states have (on average 3.128416257883672) internal successors, (17857), 5708 states have internal predecessors, (17857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:24,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5709 states to 5709 states and 17857 transitions. [2021-08-21 12:08:24,134 INFO L78 Accepts]: Start accepts. Automaton has 5709 states and 17857 transitions. Word has length 22 [2021-08-21 12:08:24,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:24,134 INFO L470 AbstractCegarLoop]: Abstraction has 5709 states and 17857 transitions. [2021-08-21 12:08:24,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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 12:08:24,134 INFO L276 IsEmpty]: Start isEmpty. Operand 5709 states and 17857 transitions. [2021-08-21 12:08:24,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:24,142 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:24,142 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:24,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:24,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-08-21 12:08:24,345 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:24,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:24,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1415390509, now seen corresponding path program 267 times [2021-08-21 12:08:24,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:24,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176489160] [2021-08-21 12:08:24,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:24,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:24,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:24,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176489160] [2021-08-21 12:08:24,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176489160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:24,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875436036] [2021-08-21 12:08:24,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:08:24,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:24,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:24,405 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:24,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2021-08-21 12:08:27,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:08:27,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:27,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:08:27,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:27,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875436036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:27,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:27,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-08-21 12:08:27,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408274009] [2021-08-21 12:08:27,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:08:27,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:27,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:08:27,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:08:27,807 INFO L87 Difference]: Start difference. First operand 5709 states and 17857 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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 12:08:28,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:28,367 INFO L93 Difference]: Finished difference Result 8455 states and 25540 transitions. [2021-08-21 12:08:28,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 12:08:28,367 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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 22 [2021-08-21 12:08:28,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:28,382 INFO L225 Difference]: With dead ends: 8455 [2021-08-21 12:08:28,382 INFO L226 Difference]: Without dead ends: 8455 [2021-08-21 12:08:28,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 437.6ms TimeCoverageRelationStatistics Valid=950, Invalid=1702, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 12:08:28,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8455 states. [2021-08-21 12:08:28,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8455 to 6970. [2021-08-21 12:08:28,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6970 states, 6969 states have (on average 3.147366910604104) internal successors, (21934), 6969 states have internal predecessors, (21934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:28,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6970 states to 6970 states and 21934 transitions. [2021-08-21 12:08:28,518 INFO L78 Accepts]: Start accepts. Automaton has 6970 states and 21934 transitions. Word has length 22 [2021-08-21 12:08:28,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:28,518 INFO L470 AbstractCegarLoop]: Abstraction has 6970 states and 21934 transitions. [2021-08-21 12:08:28,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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 12:08:28,519 INFO L276 IsEmpty]: Start isEmpty. Operand 6970 states and 21934 transitions. [2021-08-21 12:08:28,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:28,529 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:28,529 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:28,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Ended with exit code 0 [2021-08-21 12:08:28,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:28,729 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:28,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:28,730 INFO L82 PathProgramCache]: Analyzing trace with hash -843935703, now seen corresponding path program 268 times [2021-08-21 12:08:28,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:28,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826979143] [2021-08-21 12:08:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:28,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:28,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:28,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826979143] [2021-08-21 12:08:28,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826979143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:28,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986128198] [2021-08-21 12:08:28,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:08:28,785 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:28,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:28,786 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:28,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2021-08-21 12:08:32,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:08:32,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:32,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:08:32,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:32,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986128198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:32,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:32,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-08-21 12:08:32,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46106296] [2021-08-21 12:08:32,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:08:32,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:32,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:08:32,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:08:32,174 INFO L87 Difference]: Start difference. First operand 6970 states and 21934 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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 12:08:33,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:33,114 INFO L93 Difference]: Finished difference Result 8123 states and 24573 transitions. [2021-08-21 12:08:33,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-08-21 12:08:33,115 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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 22 [2021-08-21 12:08:33,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:33,129 INFO L225 Difference]: With dead ends: 8123 [2021-08-21 12:08:33,129 INFO L226 Difference]: Without dead ends: 8117 [2021-08-21 12:08:33,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2442 ImplicationChecksByTransitivity, 782.2ms TimeCoverageRelationStatistics Valid=1939, Invalid=4703, Unknown=0, NotChecked=0, Total=6642 [2021-08-21 12:08:33,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-08-21 12:08:33,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 6930. [2021-08-21 12:08:33,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6930 states, 6929 states have (on average 3.1440323278972433) internal successors, (21785), 6929 states have internal predecessors, (21785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:33,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6930 states to 6930 states and 21785 transitions. [2021-08-21 12:08:33,262 INFO L78 Accepts]: Start accepts. Automaton has 6930 states and 21785 transitions. Word has length 22 [2021-08-21 12:08:33,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:33,262 INFO L470 AbstractCegarLoop]: Abstraction has 6930 states and 21785 transitions. [2021-08-21 12:08:33,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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 12:08:33,262 INFO L276 IsEmpty]: Start isEmpty. Operand 6930 states and 21785 transitions. [2021-08-21 12:08:33,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:33,272 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:33,272 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:33,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:33,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:33,472 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:33,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:33,473 INFO L82 PathProgramCache]: Analyzing trace with hash -308705901, now seen corresponding path program 269 times [2021-08-21 12:08:33,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:33,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720981000] [2021-08-21 12:08:33,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:33,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:33,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:33,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720981000] [2021-08-21 12:08:33,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720981000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:33,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004607756] [2021-08-21 12:08:33,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:08:33,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:33,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:33,579 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:33,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2021-08-21 12:08:36,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:08:36,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:36,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:08:36,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:36,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004607756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:36,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:36,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-08-21 12:08:36,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344537664] [2021-08-21 12:08:36,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:08:36,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:36,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:08:36,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:08:36,934 INFO L87 Difference]: Start difference. First operand 6930 states and 21785 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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 12:08:37,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:37,797 INFO L93 Difference]: Finished difference Result 8123 states and 24622 transitions. [2021-08-21 12:08:37,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-21 12:08:37,797 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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 22 [2021-08-21 12:08:37,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:37,811 INFO L225 Difference]: With dead ends: 8123 [2021-08-21 12:08:37,812 INFO L226 Difference]: Without dead ends: 8111 [2021-08-21 12:08:37,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 716.4ms TimeCoverageRelationStatistics Valid=1649, Invalid=4203, Unknown=0, NotChecked=0, Total=5852 [2021-08-21 12:08:37,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8111 states. [2021-08-21 12:08:37,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8111 to 6927. [2021-08-21 12:08:37,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6927 states, 6926 states have (on average 3.1453941669073058) internal successors, (21785), 6926 states have internal predecessors, (21785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:37,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6927 states to 6927 states and 21785 transitions. [2021-08-21 12:08:37,994 INFO L78 Accepts]: Start accepts. Automaton has 6927 states and 21785 transitions. Word has length 22 [2021-08-21 12:08:37,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:37,994 INFO L470 AbstractCegarLoop]: Abstraction has 6927 states and 21785 transitions. [2021-08-21 12:08:37,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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 12:08:37,994 INFO L276 IsEmpty]: Start isEmpty. Operand 6927 states and 21785 transitions. [2021-08-21 12:08:38,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:38,004 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:38,004 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:38,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Ended with exit code 0 [2021-08-21 12:08:38,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-08-21 12:08:38,205 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:38,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:38,205 INFO L82 PathProgramCache]: Analyzing trace with hash -896451223, now seen corresponding path program 270 times [2021-08-21 12:08:38,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:38,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586484238] [2021-08-21 12:08:38,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:38,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:38,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:38,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:38,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586484238] [2021-08-21 12:08:38,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586484238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:38,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393446628] [2021-08-21 12:08:38,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:08:38,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:38,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:38,284 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:38,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2021-08-21 12:08:41,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:08:41,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:41,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:08:41,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:41,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393446628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:41,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:41,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-08-21 12:08:41,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785482165] [2021-08-21 12:08:41,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:08:41,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:41,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:08:41,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:08:41,642 INFO L87 Difference]: Start difference. First operand 6927 states and 21785 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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 12:08:42,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:42,416 INFO L93 Difference]: Finished difference Result 8230 states and 24962 transitions. [2021-08-21 12:08:42,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-21 12:08:42,416 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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 22 [2021-08-21 12:08:42,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:42,488 INFO L225 Difference]: With dead ends: 8230 [2021-08-21 12:08:42,488 INFO L226 Difference]: Without dead ends: 8212 [2021-08-21 12:08:42,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 650.6ms TimeCoverageRelationStatistics Valid=1425, Invalid=3831, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 12:08:42,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8212 states. [2021-08-21 12:08:42,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8212 to 7085. [2021-08-21 12:08:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7085 states, 7084 states have (on average 3.148927159796725) internal successors, (22307), 7084 states have internal predecessors, (22307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:42,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7085 states to 7085 states and 22307 transitions. [2021-08-21 12:08:42,611 INFO L78 Accepts]: Start accepts. Automaton has 7085 states and 22307 transitions. Word has length 22 [2021-08-21 12:08:42,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:42,611 INFO L470 AbstractCegarLoop]: Abstraction has 7085 states and 22307 transitions. [2021-08-21 12:08:42,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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 12:08:42,611 INFO L276 IsEmpty]: Start isEmpty. Operand 7085 states and 22307 transitions. [2021-08-21 12:08:42,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:42,621 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:42,622 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:42,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Ended with exit code 0 [2021-08-21 12:08:42,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:42,822 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:42,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:42,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1936687021, now seen corresponding path program 271 times [2021-08-21 12:08:42,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:42,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911990831] [2021-08-21 12:08:42,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:42,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:42,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:42,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911990831] [2021-08-21 12:08:42,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911990831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:42,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817420776] [2021-08-21 12:08:42,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:08:42,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:42,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:42,895 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:42,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2021-08-21 12:08:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:46,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:08:46,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:46,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817420776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:46,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:46,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-08-21 12:08:46,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248538719] [2021-08-21 12:08:46,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:08:46,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:46,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:08:46,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:08:46,293 INFO L87 Difference]: Start difference. First operand 7085 states and 22307 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 12:08:47,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:47,106 INFO L93 Difference]: Finished difference Result 8473 states and 25731 transitions. [2021-08-21 12:08:47,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 12:08:47,106 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 22 [2021-08-21 12:08:47,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:47,122 INFO L225 Difference]: With dead ends: 8473 [2021-08-21 12:08:47,122 INFO L226 Difference]: Without dead ends: 8449 [2021-08-21 12:08:47,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 725.9ms TimeCoverageRelationStatistics Valid=1272, Invalid=3558, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 12:08:47,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8449 states. [2021-08-21 12:08:47,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8449 to 7305. [2021-08-21 12:08:47,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7305 states, 7304 states have (on average 3.1519715224534504) internal successors, (23022), 7304 states have internal predecessors, (23022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:47,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7305 states to 7305 states and 23022 transitions. [2021-08-21 12:08:47,258 INFO L78 Accepts]: Start accepts. Automaton has 7305 states and 23022 transitions. Word has length 22 [2021-08-21 12:08:47,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:47,258 INFO L470 AbstractCegarLoop]: Abstraction has 7305 states and 23022 transitions. [2021-08-21 12:08:47,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 12:08:47,258 INFO L276 IsEmpty]: Start isEmpty. Operand 7305 states and 23022 transitions. [2021-08-21 12:08:47,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:47,269 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:47,269 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:47,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:47,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:47,470 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:47,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:47,470 INFO L82 PathProgramCache]: Analyzing trace with hash 175741609, now seen corresponding path program 272 times [2021-08-21 12:08:47,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:47,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86708812] [2021-08-21 12:08:47,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:47,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:47,581 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:47,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:47,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86708812] [2021-08-21 12:08:47,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86708812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:47,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779392488] [2021-08-21 12:08:47,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:08:47,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:47,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:47,582 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:47,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2021-08-21 12:08:50,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:08:50,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:50,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:08:50,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:50,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779392488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:50,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:50,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 12:08:50,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004142306] [2021-08-21 12:08:50,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:08:50,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:50,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:08:50,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:08:50,965 INFO L87 Difference]: Start difference. First operand 7305 states and 23022 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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 12:08:51,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:51,620 INFO L93 Difference]: Finished difference Result 8382 states and 25614 transitions. [2021-08-21 12:08:51,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 12:08:51,620 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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 22 [2021-08-21 12:08:51,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:51,634 INFO L225 Difference]: With dead ends: 8382 [2021-08-21 12:08:51,634 INFO L226 Difference]: Without dead ends: 8352 [2021-08-21 12:08:51,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 626.2ms TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 12:08:51,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2021-08-21 12:08:51,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 7353. [2021-08-21 12:08:51,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7353 states, 7352 states have (on average 3.1509793253536453) internal successors, (23166), 7352 states have internal predecessors, (23166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:51,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7353 states to 7353 states and 23166 transitions. [2021-08-21 12:08:51,769 INFO L78 Accepts]: Start accepts. Automaton has 7353 states and 23166 transitions. Word has length 22 [2021-08-21 12:08:51,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:51,769 INFO L470 AbstractCegarLoop]: Abstraction has 7353 states and 23166 transitions. [2021-08-21 12:08:51,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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 12:08:51,769 INFO L276 IsEmpty]: Start isEmpty. Operand 7353 states and 23166 transitions. [2021-08-21 12:08:51,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:08:51,780 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:51,780 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:51,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Ended with exit code 0 [2021-08-21 12:08:51,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable285 [2021-08-21 12:08:51,981 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:51,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:51,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1983045351, now seen corresponding path program 273 times [2021-08-21 12:08:51,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:51,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827591172] [2021-08-21 12:08:51,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:51,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:52,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:52,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827591172] [2021-08-21 12:08:52,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827591172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:52,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463003760] [2021-08-21 12:08:52,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:08:52,190 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:52,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:52,191 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:52,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2021-08-21 12:08:55,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:08:55,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:55,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 12:08:55,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:55,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463003760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:55,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:55,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-08-21 12:08:55,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989364053] [2021-08-21 12:08:55,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:08:55,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:55,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:08:55,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:08:55,805 INFO L87 Difference]: Start difference. First operand 7353 states and 23166 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:56,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:56,298 INFO L93 Difference]: Finished difference Result 7724 states and 23857 transitions. [2021-08-21 12:08:56,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:08:56,298 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:08:56,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:56,313 INFO L225 Difference]: With dead ends: 7724 [2021-08-21 12:08:56,314 INFO L226 Difference]: Without dead ends: 7695 [2021-08-21 12:08:56,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 369.4ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:08:56,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7695 states. [2021-08-21 12:08:56,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7695 to 7410. [2021-08-21 12:08:56,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7410 states, 7409 states have (on average 3.140099878526117) internal successors, (23265), 7409 states have internal predecessors, (23265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:56,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 23265 transitions. [2021-08-21 12:08:56,441 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 23265 transitions. Word has length 23 [2021-08-21 12:08:56,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:56,441 INFO L470 AbstractCegarLoop]: Abstraction has 7410 states and 23265 transitions. [2021-08-21 12:08:56,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:56,441 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 23265 transitions. [2021-08-21 12:08:56,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:08:56,453 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:56,453 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:56,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Ended with exit code 0 [2021-08-21 12:08:56,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:56,653 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:56,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:56,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1192842795, now seen corresponding path program 274 times [2021-08-21 12:08:56,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:56,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168532935] [2021-08-21 12:08:56,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:56,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:56,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:56,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:56,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168532935] [2021-08-21 12:08:56,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168532935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:56,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440365730] [2021-08-21 12:08:56,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:08:56,829 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:56,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:56,830 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:56,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2021-08-21 12:09:00,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:09:00,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:00,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 12:09:00,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:00,454 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:00,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440365730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:00,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:00,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-08-21 12:09:00,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025209001] [2021-08-21 12:09:00,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:09:00,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:00,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:09:00,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:09:00,455 INFO L87 Difference]: Start difference. First operand 7410 states and 23265 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:00,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:00,781 INFO L93 Difference]: Finished difference Result 7815 states and 24110 transitions. [2021-08-21 12:09:00,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:09:00,782 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:09:00,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:00,796 INFO L225 Difference]: With dead ends: 7815 [2021-08-21 12:09:00,796 INFO L226 Difference]: Without dead ends: 7808 [2021-08-21 12:09:00,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 252.5ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:09:00,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7808 states. [2021-08-21 12:09:00,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7808 to 7508. [2021-08-21 12:09:00,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7508 states, 7507 states have (on average 3.1443985613427468) internal successors, (23605), 7507 states have internal predecessors, (23605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:00,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7508 states to 7508 states and 23605 transitions. [2021-08-21 12:09:00,921 INFO L78 Accepts]: Start accepts. Automaton has 7508 states and 23605 transitions. Word has length 23 [2021-08-21 12:09:00,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:00,921 INFO L470 AbstractCegarLoop]: Abstraction has 7508 states and 23605 transitions. [2021-08-21 12:09:00,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:00,921 INFO L276 IsEmpty]: Start isEmpty. Operand 7508 states and 23605 transitions. [2021-08-21 12:09:00,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:09:00,932 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:00,932 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:00,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Ended with exit code 0 [2021-08-21 12:09:01,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-08-21 12:09:01,132 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:01,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:01,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1487421777, now seen corresponding path program 275 times [2021-08-21 12:09:01,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:01,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830289250] [2021-08-21 12:09:01,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:01,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:01,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:01,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830289250] [2021-08-21 12:09:01,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830289250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:01,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102717434] [2021-08-21 12:09:01,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:09:01,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:01,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:01,323 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:01,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2021-08-21 12:09:04,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:09:04,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:04,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 12:09:04,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:04,931 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:04,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102717434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:04,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:04,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-08-21 12:09:04,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803415534] [2021-08-21 12:09:04,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:09:04,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:04,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:09:04,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:09:04,932 INFO L87 Difference]: Start difference. First operand 7508 states and 23605 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 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 12:09:05,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:05,249 INFO L93 Difference]: Finished difference Result 7801 states and 24090 transitions. [2021-08-21 12:09:05,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:09:05,249 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 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 23 [2021-08-21 12:09:05,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:05,262 INFO L225 Difference]: With dead ends: 7801 [2021-08-21 12:09:05,262 INFO L226 Difference]: Without dead ends: 7785 [2021-08-21 12:09:05,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 285.3ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:09:05,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7785 states. [2021-08-21 12:09:05,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7785 to 7430. [2021-08-21 12:09:05,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:05,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-08-21 12:09:05,391 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-08-21 12:09:05,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:05,391 INFO L470 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-08-21 12:09:05,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 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 12:09:05,391 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-08-21 12:09:05,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:09:05,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:05,402 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:05,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Ended with exit code 0 [2021-08-21 12:09:05,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-08-21 12:09:05,603 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:05,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:05,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1764297601, now seen corresponding path program 276 times [2021-08-21 12:09:05,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:05,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245741647] [2021-08-21 12:09:05,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:05,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:05,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:05,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245741647] [2021-08-21 12:09:05,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245741647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:05,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074872184] [2021-08-21 12:09:05,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:09:05,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:05,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:05,790 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:05,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2021-08-21 12:09:09,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:09:09,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:09,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 12:09:09,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:09,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074872184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:09,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:09,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-08-21 12:09:09,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67437547] [2021-08-21 12:09:09,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:09:09,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:09,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:09:09,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:09:09,453 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:09,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:09,765 INFO L93 Difference]: Finished difference Result 7734 states and 23848 transitions. [2021-08-21 12:09:09,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:09:09,766 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:09:09,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:09,779 INFO L225 Difference]: With dead ends: 7734 [2021-08-21 12:09:09,780 INFO L226 Difference]: Without dead ends: 7727 [2021-08-21 12:09:09,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 294.5ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:09:09,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7727 states. [2021-08-21 12:09:09,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7727 to 7430. [2021-08-21 12:09:09,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:09,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-08-21 12:09:09,906 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-08-21 12:09:09,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:09,907 INFO L470 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-08-21 12:09:09,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:09,907 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-08-21 12:09:09,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:09:09,918 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:09,918 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:09,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:10,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-08-21 12:09:10,118 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:10,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:10,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1995439893, now seen corresponding path program 277 times [2021-08-21 12:09:10,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:10,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391789461] [2021-08-21 12:09:10,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:10,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:10,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:10,310 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:10,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:10,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391789461] [2021-08-21 12:09:10,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391789461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:10,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168805776] [2021-08-21 12:09:10,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:09:10,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:10,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:10,311 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:10,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2021-08-21 12:09:13,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:13,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 12:09:13,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:13,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168805776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:13,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:13,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-08-21 12:09:13,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619170662] [2021-08-21 12:09:13,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:09:13,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:13,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:09:13,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:09:13,981 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:14,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:14,352 INFO L93 Difference]: Finished difference Result 7751 states and 23873 transitions. [2021-08-21 12:09:14,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:09:14,352 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:09:14,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:14,366 INFO L225 Difference]: With dead ends: 7751 [2021-08-21 12:09:14,367 INFO L226 Difference]: Without dead ends: 7744 [2021-08-21 12:09:14,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 308.2ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:09:14,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7744 states. [2021-08-21 12:09:14,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7744 to 7430. [2021-08-21 12:09:14,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:14,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-08-21 12:09:14,501 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-08-21 12:09:14,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:14,501 INFO L470 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-08-21 12:09:14,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:14,501 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-08-21 12:09:14,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:09:14,512 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:14,512 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:14,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Ended with exit code 0 [2021-08-21 12:09:14,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:14,713 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:14,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:14,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1711782081, now seen corresponding path program 278 times [2021-08-21 12:09:14,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:14,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412851033] [2021-08-21 12:09:14,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:14,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:14,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:14,912 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:14,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:14,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412851033] [2021-08-21 12:09:14,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412851033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:14,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194893837] [2021-08-21 12:09:14,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:09:14,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:14,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:14,913 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:14,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2021-08-21 12:09:18,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:09:18,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:18,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 12:09:18,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:18,636 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:18,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194893837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:18,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:18,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-08-21 12:09:18,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826825998] [2021-08-21 12:09:18,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:09:18,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:18,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:09:18,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:09:18,637 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:19,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:19,066 INFO L93 Difference]: Finished difference Result 7771 states and 23903 transitions. [2021-08-21 12:09:19,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:09:19,066 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:09:19,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:19,080 INFO L225 Difference]: With dead ends: 7771 [2021-08-21 12:09:19,080 INFO L226 Difference]: Without dead ends: 7764 [2021-08-21 12:09:19,080 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 324.2ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:09:19,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7764 states. [2021-08-21 12:09:19,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7764 to 7430. [2021-08-21 12:09:19,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:19,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-08-21 12:09:19,211 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-08-21 12:09:19,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:19,211 INFO L470 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-08-21 12:09:19,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:19,211 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-08-21 12:09:19,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:09:19,222 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:19,222 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:19,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:19,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:19,423 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:19,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:19,423 INFO L82 PathProgramCache]: Analyzing trace with hash 671546283, now seen corresponding path program 279 times [2021-08-21 12:09:19,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:19,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482148870] [2021-08-21 12:09:19,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:19,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:19,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:19,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482148870] [2021-08-21 12:09:19,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482148870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:19,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069618012] [2021-08-21 12:09:19,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:09:19,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:19,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:19,622 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:19,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2021-08-21 12:09:23,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:09:23,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:23,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 12:09:23,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:23,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069618012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:23,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:23,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-08-21 12:09:23,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800184397] [2021-08-21 12:09:23,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:09:23,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:23,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:09:23,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:09:23,363 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:23,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:23,821 INFO L93 Difference]: Finished difference Result 7671 states and 23732 transitions. [2021-08-21 12:09:23,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:09:23,821 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:09:23,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:23,836 INFO L225 Difference]: With dead ends: 7671 [2021-08-21 12:09:23,836 INFO L226 Difference]: Without dead ends: 7664 [2021-08-21 12:09:23,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 343.7ms TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:09:23,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7664 states. [2021-08-21 12:09:23,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7664 to 7430. [2021-08-21 12:09:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:23,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-08-21 12:09:23,965 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-08-21 12:09:23,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:23,965 INFO L470 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-08-21 12:09:23,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:23,965 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-08-21 12:09:23,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:09:23,976 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:23,976 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:24,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Ended with exit code 0 [2021-08-21 12:09:24,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-08-21 12:09:24,176 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:24,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:24,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1836712423, now seen corresponding path program 280 times [2021-08-21 12:09:24,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:24,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571038899] [2021-08-21 12:09:24,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:24,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:24,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:24,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571038899] [2021-08-21 12:09:24,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571038899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:24,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886462649] [2021-08-21 12:09:24,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:09:24,405 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:24,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:24,405 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:24,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 12:09:27,219 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 12:09:27,219 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 12:09:27,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:09:27,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:27,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 12:09:27,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:27,839 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 12:09:27,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:28,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:28,040 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. [2021-08-21 12:09:28,041 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 12:09:28,041 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 12:09:28,046 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 12:09:28,046 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 12:09:28,047 INFO L202 PluginConnector]: Adding new model fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 12:09:28 BasicIcfg [2021-08-21 12:09:28,047 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 12:09:28,048 INFO L168 Benchmark]: Toolchain (without parser) took 703825.57 ms. Allocated memory was 208.7 MB in the beginning and 2.5 GB in the end (delta: 2.3 GB). Free memory was 190.2 MB in the beginning and 1.4 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-08-21 12:09:28,049 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 208.7 MB. Free memory is still 191.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 12:09:28,049 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.67 ms. Allocated memory is still 208.7 MB. Free memory was 190.1 MB in the beginning and 188.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 12:09:28,049 INFO L168 Benchmark]: Boogie Preprocessor took 18.35 ms. Allocated memory is still 208.7 MB. Free memory was 188.7 MB in the beginning and 187.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 12:09:28,049 INFO L168 Benchmark]: RCFGBuilder took 329.48 ms. Allocated memory is still 208.7 MB. Free memory was 187.7 MB in the beginning and 173.0 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-08-21 12:09:28,050 INFO L168 Benchmark]: TraceAbstraction took 703443.46 ms. Allocated memory was 208.7 MB in the beginning and 2.5 GB in the end (delta: 2.3 GB). Free memory was 172.5 MB in the beginning and 1.4 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.0 GB. Max. memory is 8.0 GB. [2021-08-21 12:09:28,051 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 208.7 MB. Free memory is still 191.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.67 ms. Allocated memory is still 208.7 MB. Free memory was 190.1 MB in the beginning and 188.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.35 ms. Allocated memory is still 208.7 MB. Free memory was 188.7 MB in the beginning and 187.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 329.48 ms. Allocated memory is still 208.7 MB. Free memory was 187.7 MB in the beginning and 173.0 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 703443.46 ms. Allocated memory was 208.7 MB in the beginning and 2.5 GB in the end (delta: 2.3 GB). Free memory was 172.5 MB in the beginning and 1.4 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.0 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: 64]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 59]: 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 24 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 59]: 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 24 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 703319.0ms, OverallIterations: 294, TraceHistogramMax: 5, EmptinessCheckTime: 817.2ms, AutomataDifference: 93521.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11293 SDtfs, 33163 SDslu, 78862 SDs, 0 SdLazy, 68841 SolverSat, 6638 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 27832.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13821 GetRequests, 4193 SyntacticMatches, 281 SemanticMatches, 9347 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106465 ImplicationChecksByTransitivity, 80782.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=7508occurred in iteration=288, InterpolantAutomatonStates: 7923, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 9324.6ms AutomataMinimizationTime, 293 MinimizatonAttempts, 108053 StatesRemovedByMinimization, 291 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 951.7ms SsaConstructionTime, 3853.5ms SatisfiabilityAnalysisTime, 65973.1ms InterpolantComputationTime, 11306 NumberOfCodeBlocks, 11306 NumberOfCodeBlocksAsserted, 997 NumberOfCheckSat, 10731 ConstructedInterpolants, 0 QuantifiedInterpolants, 62811 SizeOfPredicates, 642 NumberOfNonLiveVariables, 22401 ConjunctsInSsa, 4739 ConjunctsInUnsatCore, 575 InterpolantComputations, 11 PerfectInterpolantSequences, 3136/9139 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