/usr/bin/java -Xmx16000000000 -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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp1x3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 14:43:41,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 14:43:41,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 14:43:41,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 14:43:41,566 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-Separate.epf [2022-01-18 14:43:41,581 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 14:43:41,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 14:43:41,582 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 14:43:41,582 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 14:43:41,582 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 14:43:41,583 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 14:43:41,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 14:43:41,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 14:43:41,584 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 14:43:41,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 14:43:41,584 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 14:43:41,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 14:43:41,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 14:43:41,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 14:43:41,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 14:43:41,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 14:43:41,584 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 14:43:41,584 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 14:43:41,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 14:43:41,585 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 14:43:41,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 14:43:41,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 14:43:41,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 14:43:41,585 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 14:43:41,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 14:43:41,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 14:43:41,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 14:43:41,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 14:43:41,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 14:43:41,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 14:43:41,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 14:43:41,586 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 14:43:41,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 14:43:41,586 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 14:43:41,586 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 14:43:41,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 14:43:41,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 14:43:41,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 14:43:41,779 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 14:43:41,781 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 14:43:41,782 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp1x3.wvr.bpl [2022-01-18 14:43:41,782 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp1x3.wvr.bpl' [2022-01-18 14:43:41,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 14:43:41,802 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 14:43:41,803 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 14:43:41,803 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 14:43:41,803 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 14:43:41,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:43:41" (1/1) ... [2022-01-18 14:43:41,815 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:43:41" (1/1) ... [2022-01-18 14:43:41,819 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 14:43:41,820 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 14:43:41,821 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 14:43:41,821 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 14:43:41,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 14:43:41,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:43:41" (1/1) ... [2022-01-18 14:43:41,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:43:41" (1/1) ... [2022-01-18 14:43:41,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:43:41" (1/1) ... [2022-01-18 14:43:41,826 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:43:41" (1/1) ... [2022-01-18 14:43:41,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:43:41" (1/1) ... [2022-01-18 14:43:41,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:43:41" (1/1) ... [2022-01-18 14:43:41,832 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:43:41" (1/1) ... [2022-01-18 14:43:41,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 14:43:41,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 14:43:41,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 14:43:41,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 14:43:41,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:43:41" (1/1) ... [2022-01-18 14:43:41,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 14:43:41,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:41,861 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) [2022-01-18 14:43:41,867 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 [2022-01-18 14:43:41,894 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 14:43:41,894 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 14:43:41,894 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 14:43:41,894 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 14:43:41,894 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 14:43:41,894 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 14:43:41,894 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 14:43:41,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 14:43:41,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 14:43:41,895 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 14:43:41,925 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 14:43:41,926 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 14:43:41,981 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 14:43:41,985 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 14:43:41,985 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 14:43:41,986 INFO L202 PluginConnector]: Adding new model exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 02:43:41 BoogieIcfgContainer [2022-01-18 14:43:41,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 14:43:41,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 14:43:41,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 14:43:41,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 14:43:41,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:43:41" (1/2) ... [2022-01-18 14:43:41,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@788e572d and model type exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 02:43:41, skipping insertion in model container [2022-01-18 14:43:41,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 02:43:41" (2/2) ... [2022-01-18 14:43:41,991 INFO L111 eAbstractionObserver]: Analyzing ICFG exp1x3.wvr.bpl [2022-01-18 14:43:41,994 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 14:43:41,995 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 14:43:41,995 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 14:43:41,995 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 14:43:42,015 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-18 14:43:42,041 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 14:43:42,046 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, mAutomataTypeConcurrency=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 [2022-01-18 14:43:42,046 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 14:43:42,051 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2022-01-18 14:43:42,061 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) [2022-01-18 14:43:42,063 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) [2022-01-18 14:43:42,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-18 14:43:42,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:42,067 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:42,068 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:42,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:42,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1426123481, now seen corresponding path program 1 times [2022-01-18 14:43:42,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:42,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672680546] [2022-01-18 14:43:42,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:42,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:42,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:42,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:42,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:42,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672680546] [2022-01-18 14:43:42,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672680546] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:43:42,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:43:42,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 14:43:42,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385738192] [2022-01-18 14:43:42,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:43:42,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 14:43:42,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:42,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 14:43:42,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 14:43:42,208 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 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:42,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:42,244 INFO L93 Difference]: Finished difference Result 54 states and 102 transitions. [2022-01-18 14:43:42,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 14:43:42,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-18 14:43:42,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:42,251 INFO L225 Difference]: With dead ends: 54 [2022-01-18 14:43:42,251 INFO L226 Difference]: Without dead ends: 47 [2022-01-18 14:43:42,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 14:43:42,255 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:42,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:43:42,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-18 14:43:42,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2022-01-18 14:43:42,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:42,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2022-01-18 14:43:42,277 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 11 [2022-01-18 14:43:42,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:42,278 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2022-01-18 14:43:42,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:42,278 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2022-01-18 14:43:42,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 14:43:42,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:42,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:42,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 14:43:42,279 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:42,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:42,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1215702821, now seen corresponding path program 1 times [2022-01-18 14:43:42,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:42,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309499441] [2022-01-18 14:43:42,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:42,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:42,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:42,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309499441] [2022-01-18 14:43:42,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309499441] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:42,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245559706] [2022-01-18 14:43:42,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:42,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:42,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:42,309 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) [2022-01-18 14:43:42,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 14:43:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:42,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 14:43:42,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:42,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:42,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245559706] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:42,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:42,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-01-18 14:43:42,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979604010] [2022-01-18 14:43:42,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:42,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 14:43:42,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:42,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 14:43:42,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:43:42,482 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2022-01-18 14:43:42,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:42,539 INFO L93 Difference]: Finished difference Result 65 states and 116 transitions. [2022-01-18 14:43:42,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:43:42,540 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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 [2022-01-18 14:43:42,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:42,541 INFO L225 Difference]: With dead ends: 65 [2022-01-18 14:43:42,541 INFO L226 Difference]: Without dead ends: 65 [2022-01-18 14:43:42,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:43:42,542 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:42,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 17 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:43:42,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-18 14:43:42,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2022-01-18 14:43:42,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:42,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 73 transitions. [2022-01-18 14:43:42,550 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 73 transitions. Word has length 13 [2022-01-18 14:43:42,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:42,550 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 73 transitions. [2022-01-18 14:43:42,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2022-01-18 14:43:42,550 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 73 transitions. [2022-01-18 14:43:42,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 14:43:42,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:42,551 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:42,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:42,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:42,769 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:42,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:42,770 INFO L85 PathProgramCache]: Analyzing trace with hash -512897513, now seen corresponding path program 1 times [2022-01-18 14:43:42,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:42,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867344453] [2022-01-18 14:43:42,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:42,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:42,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:42,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:42,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:42,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867344453] [2022-01-18 14:43:42,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867344453] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:43:42,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:43:42,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 14:43:42,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013818457] [2022-01-18 14:43:42,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:43:42,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 14:43:42,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:42,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 14:43:42,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:43:42,805 INFO L87 Difference]: Start difference. First operand 38 states and 73 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2022-01-18 14:43:42,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:42,842 INFO L93 Difference]: Finished difference Result 52 states and 95 transitions. [2022-01-18 14:43:42,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:43:42,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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 [2022-01-18 14:43:42,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:42,847 INFO L225 Difference]: With dead ends: 52 [2022-01-18 14:43:42,847 INFO L226 Difference]: Without dead ends: 47 [2022-01-18 14:43:42,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:43:42,851 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:42,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 9 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:43:42,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-18 14:43:42,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2022-01-18 14:43:42,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:42,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2022-01-18 14:43:42,865 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 13 [2022-01-18 14:43:42,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:42,866 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2022-01-18 14:43:42,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2022-01-18 14:43:42,866 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2022-01-18 14:43:42,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 14:43:42,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:42,866 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:42,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 14:43:42,867 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:42,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:42,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1777825373, now seen corresponding path program 2 times [2022-01-18 14:43:42,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:42,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017492707] [2022-01-18 14:43:42,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:42,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:42,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:42,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017492707] [2022-01-18 14:43:42,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017492707] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:43:42,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:43:42,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 14:43:42,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804823347] [2022-01-18 14:43:42,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:43:42,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 14:43:42,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:42,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 14:43:42,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:43:42,900 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2022-01-18 14:43:42,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:42,937 INFO L93 Difference]: Finished difference Result 48 states and 90 transitions. [2022-01-18 14:43:42,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:43:42,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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 [2022-01-18 14:43:42,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:42,938 INFO L225 Difference]: With dead ends: 48 [2022-01-18 14:43:42,938 INFO L226 Difference]: Without dead ends: 48 [2022-01-18 14:43:42,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:43:42,941 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:42,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 15 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:43:42,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-18 14:43:42,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2022-01-18 14:43:42,945 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) [2022-01-18 14:43:42,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2022-01-18 14:43:42,945 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 13 [2022-01-18 14:43:42,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:42,945 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2022-01-18 14:43:42,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2022-01-18 14:43:42,946 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2022-01-18 14:43:42,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 14:43:42,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:42,946 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:42,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 14:43:42,946 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:42,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:42,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1133243841, now seen corresponding path program 2 times [2022-01-18 14:43:42,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:42,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203335868] [2022-01-18 14:43:42,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:42,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:42,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:42,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203335868] [2022-01-18 14:43:42,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203335868] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:43:42,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:43:42,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 14:43:42,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701126229] [2022-01-18 14:43:42,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:43:42,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 14:43:42,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:42,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 14:43:42,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:43:42,972 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2022-01-18 14:43:43,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:43,002 INFO L93 Difference]: Finished difference Result 49 states and 90 transitions. [2022-01-18 14:43:43,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:43:43,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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 [2022-01-18 14:43:43,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:43,003 INFO L225 Difference]: With dead ends: 49 [2022-01-18 14:43:43,003 INFO L226 Difference]: Without dead ends: 47 [2022-01-18 14:43:43,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:43:43,008 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:43,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 11 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:43:43,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-18 14:43:43,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2022-01-18 14:43:43,011 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) [2022-01-18 14:43:43,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2022-01-18 14:43:43,011 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 13 [2022-01-18 14:43:43,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:43,011 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2022-01-18 14:43:43,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2022-01-18 14:43:43,012 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2022-01-18 14:43:43,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:43:43,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:43,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:43,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 14:43:43,012 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:43,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:43,013 INFO L85 PathProgramCache]: Analyzing trace with hash -982301799, now seen corresponding path program 1 times [2022-01-18 14:43:43,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:43,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862209925] [2022-01-18 14:43:43,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:43,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:43,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:43,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862209925] [2022-01-18 14:43:43,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862209925] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:43,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743418922] [2022-01-18 14:43:43,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:43,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:43,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:43,057 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) [2022-01-18 14:43:43,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 14:43:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:43,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:43:43,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:43,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:43,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743418922] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:43,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:43,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 3] total 4 [2022-01-18 14:43:43,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048740805] [2022-01-18 14:43:43,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:43,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 14:43:43,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:43,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 14:43:43,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:43:43,309 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 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) [2022-01-18 14:43:43,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:43,361 INFO L93 Difference]: Finished difference Result 97 states and 185 transitions. [2022-01-18 14:43:43,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:43:43,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 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 [2022-01-18 14:43:43,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:43,364 INFO L225 Difference]: With dead ends: 97 [2022-01-18 14:43:43,364 INFO L226 Difference]: Without dead ends: 90 [2022-01-18 14:43:43,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:43:43,367 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:43,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 25 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:43:43,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-18 14:43:43,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 66. [2022-01-18 14:43:43,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:43,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 136 transitions. [2022-01-18 14:43:43,382 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 136 transitions. Word has length 15 [2022-01-18 14:43:43,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:43,383 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 136 transitions. [2022-01-18 14:43:43,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 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) [2022-01-18 14:43:43,383 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 136 transitions. [2022-01-18 14:43:43,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:43:43,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:43,384 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:43,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:43,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-18 14:43:43,584 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:43,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:43,585 INFO L85 PathProgramCache]: Analyzing trace with hash 2131843737, now seen corresponding path program 2 times [2022-01-18 14:43:43,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:43,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125164833] [2022-01-18 14:43:43,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:43,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:43:43,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:43,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125164833] [2022-01-18 14:43:43,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125164833] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:43:43,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:43:43,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 14:43:43,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093221391] [2022-01-18 14:43:43,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:43:43,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 14:43:43,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:43,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 14:43:43,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:43:43,617 INFO L87 Difference]: Start difference. First operand 66 states and 136 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:43,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:43,649 INFO L93 Difference]: Finished difference Result 115 states and 230 transitions. [2022-01-18 14:43:43,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 14:43:43,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 [2022-01-18 14:43:43,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:43,650 INFO L225 Difference]: With dead ends: 115 [2022-01-18 14:43:43,650 INFO L226 Difference]: Without dead ends: 108 [2022-01-18 14:43:43,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:43:43,651 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:43,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 20 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:43:43,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-18 14:43:43,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 83. [2022-01-18 14:43:43,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1707317073170733) internal successors, (178), 82 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:43,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 178 transitions. [2022-01-18 14:43:43,655 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 178 transitions. Word has length 15 [2022-01-18 14:43:43,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:43,656 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 178 transitions. [2022-01-18 14:43:43,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:43,656 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 178 transitions. [2022-01-18 14:43:43,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:43:43,657 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:43,657 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:43,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-18 14:43:43,657 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:43,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:43,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1108254565, now seen corresponding path program 3 times [2022-01-18 14:43:43,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:43,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011816141] [2022-01-18 14:43:43,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:43,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:43,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:43,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:43,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011816141] [2022-01-18 14:43:43,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011816141] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:43,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904357616] [2022-01-18 14:43:43,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:43:43,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:43,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:43,685 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) [2022-01-18 14:43:43,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 14:43:43,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:43:43,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:43:43,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:43:43,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:43,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:43,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904357616] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:43,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:43,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 14:43:43,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047027085] [2022-01-18 14:43:43,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:43,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:43:43,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:43,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:43:43,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:43:43,806 INFO L87 Difference]: Start difference. First operand 83 states and 178 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2022-01-18 14:43:44,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:44,004 INFO L93 Difference]: Finished difference Result 164 states and 313 transitions. [2022-01-18 14:43:44,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:43:44,005 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 17 [2022-01-18 14:43:44,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:44,006 INFO L225 Difference]: With dead ends: 164 [2022-01-18 14:43:44,006 INFO L226 Difference]: Without dead ends: 164 [2022-01-18 14:43:44,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:43:44,007 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 59 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:44,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 56 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:43:44,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-18 14:43:44,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 80. [2022-01-18 14:43:44,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:44,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2022-01-18 14:43:44,020 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 17 [2022-01-18 14:43:44,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:44,020 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2022-01-18 14:43:44,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2022-01-18 14:43:44,021 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2022-01-18 14:43:44,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:43:44,024 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:44,025 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:44,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:44,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:44,239 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:44,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:44,240 INFO L85 PathProgramCache]: Analyzing trace with hash -22219049, now seen corresponding path program 4 times [2022-01-18 14:43:44,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:44,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835392310] [2022-01-18 14:43:44,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:44,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:44,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:44,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835392310] [2022-01-18 14:43:44,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835392310] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:44,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425261839] [2022-01-18 14:43:44,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:43:44,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:44,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:44,275 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) [2022-01-18 14:43:44,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 14:43:44,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:43:44,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:43:44,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:43:44,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:44,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:44,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:44,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425261839] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:44,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:44,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 14:43:44,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876419674] [2022-01-18 14:43:44,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:44,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:43:44,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:44,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:43:44,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:43:44,366 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2022-01-18 14:43:44,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:44,460 INFO L93 Difference]: Finished difference Result 148 states and 261 transitions. [2022-01-18 14:43:44,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:43:44,461 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 17 [2022-01-18 14:43:44,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:44,461 INFO L225 Difference]: With dead ends: 148 [2022-01-18 14:43:44,461 INFO L226 Difference]: Without dead ends: 134 [2022-01-18 14:43:44,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:43:44,462 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:44,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 44 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:43:44,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-18 14:43:44,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 89. [2022-01-18 14:43:44,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.0454545454545454) internal successors, (180), 88 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:44,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 180 transitions. [2022-01-18 14:43:44,465 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 180 transitions. Word has length 17 [2022-01-18 14:43:44,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:44,465 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 180 transitions. [2022-01-18 14:43:44,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2022-01-18 14:43:44,466 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 180 transitions. [2022-01-18 14:43:44,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:43:44,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:44,466 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:44,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:44,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:44,679 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:44,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:44,680 INFO L85 PathProgramCache]: Analyzing trace with hash -454722393, now seen corresponding path program 5 times [2022-01-18 14:43:44,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:44,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508310988] [2022-01-18 14:43:44,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:44,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:44,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:44,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:44,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508310988] [2022-01-18 14:43:44,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508310988] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:44,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878453905] [2022-01-18 14:43:44,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:43:44,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:44,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:44,701 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) [2022-01-18 14:43:44,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:43:44,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:43:44,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:43:44,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:44,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 14:43:44,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:44,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:44,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878453905] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:44,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:44,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 6 [2022-01-18 14:43:44,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926335824] [2022-01-18 14:43:44,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:44,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:43:44,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:44,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:43:44,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:43:44,809 INFO L87 Difference]: Start difference. First operand 89 states and 180 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 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) [2022-01-18 14:43:44,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:44,902 INFO L93 Difference]: Finished difference Result 127 states and 234 transitions. [2022-01-18 14:43:44,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:43:44,903 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 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 17 [2022-01-18 14:43:44,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:44,904 INFO L225 Difference]: With dead ends: 127 [2022-01-18 14:43:44,904 INFO L226 Difference]: Without dead ends: 127 [2022-01-18 14:43:44,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:43:44,905 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:44,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 36 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:43:44,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-18 14:43:44,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 88. [2022-01-18 14:43:44,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.0229885057471266) internal successors, (176), 87 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:44,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 176 transitions. [2022-01-18 14:43:44,907 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 176 transitions. Word has length 17 [2022-01-18 14:43:44,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:44,907 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 176 transitions. [2022-01-18 14:43:44,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 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) [2022-01-18 14:43:44,907 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 176 transitions. [2022-01-18 14:43:44,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:43:44,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:44,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:44,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:45,119 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,SelfDestructingSolverStorable9 [2022-01-18 14:43:45,119 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:45,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:45,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1838620475, now seen corresponding path program 6 times [2022-01-18 14:43:45,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:45,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575226136] [2022-01-18 14:43:45,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:45,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:45,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:45,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:45,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:45,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575226136] [2022-01-18 14:43:45,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575226136] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:45,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449272580] [2022-01-18 14:43:45,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:43:45,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:45,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:45,139 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) [2022-01-18 14:43:45,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 14:43:45,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:43:45,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:43:45,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:43:45,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:45,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:45,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:45,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449272580] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:45,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:45,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 6 [2022-01-18 14:43:45,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136450520] [2022-01-18 14:43:45,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:45,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:43:45,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:45,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:43:45,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:43:45,237 INFO L87 Difference]: Start difference. First operand 88 states and 176 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 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) [2022-01-18 14:43:45,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:45,286 INFO L93 Difference]: Finished difference Result 99 states and 192 transitions. [2022-01-18 14:43:45,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:43:45,286 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 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 17 [2022-01-18 14:43:45,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:45,287 INFO L225 Difference]: With dead ends: 99 [2022-01-18 14:43:45,287 INFO L226 Difference]: Without dead ends: 97 [2022-01-18 14:43:45,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:43:45,288 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:45,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 26 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:43:45,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-18 14:43:45,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2022-01-18 14:43:45,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 87 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:45,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 175 transitions. [2022-01-18 14:43:45,290 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 175 transitions. Word has length 17 [2022-01-18 14:43:45,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:45,290 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 175 transitions. [2022-01-18 14:43:45,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 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) [2022-01-18 14:43:45,291 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 175 transitions. [2022-01-18 14:43:45,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:43:45,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:45,291 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:45,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:45,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:45,507 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:45,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:45,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1623369573, now seen corresponding path program 7 times [2022-01-18 14:43:45,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:45,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131745312] [2022-01-18 14:43:45,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:45,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:45,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:45,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:45,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:45,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131745312] [2022-01-18 14:43:45,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131745312] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:45,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637619137] [2022-01-18 14:43:45,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:43:45,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:45,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:45,538 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) [2022-01-18 14:43:45,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 14:43:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:45,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:43:45,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:45,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:45,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:45,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637619137] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:45,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:45,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 6 [2022-01-18 14:43:45,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394992556] [2022-01-18 14:43:45,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:45,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:43:45,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:45,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:43:45,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:43:45,645 INFO L87 Difference]: Start difference. First operand 88 states and 175 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 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) [2022-01-18 14:43:45,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:45,722 INFO L93 Difference]: Finished difference Result 137 states and 253 transitions. [2022-01-18 14:43:45,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:43:45,722 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 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 [2022-01-18 14:43:45,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:45,723 INFO L225 Difference]: With dead ends: 137 [2022-01-18 14:43:45,723 INFO L226 Difference]: Without dead ends: 137 [2022-01-18 14:43:45,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:43:45,724 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 62 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:45,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 25 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:43:45,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-18 14:43:45,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 88. [2022-01-18 14:43:45,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.0) internal successors, (174), 87 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:45,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 174 transitions. [2022-01-18 14:43:45,726 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 174 transitions. Word has length 17 [2022-01-18 14:43:45,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:45,727 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 174 transitions. [2022-01-18 14:43:45,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 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) [2022-01-18 14:43:45,727 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 174 transitions. [2022-01-18 14:43:45,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:43:45,727 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:45,727 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:45,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:45,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:45,931 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:45,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:45,932 INFO L85 PathProgramCache]: Analyzing trace with hash -920564265, now seen corresponding path program 8 times [2022-01-18 14:43:45,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:45,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723087399] [2022-01-18 14:43:45,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:45,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:45,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:45,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723087399] [2022-01-18 14:43:45,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723087399] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:45,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659823557] [2022-01-18 14:43:45,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:43:45,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:45,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:45,960 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) [2022-01-18 14:43:45,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 14:43:45,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:43:45,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:43:45,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:43:45,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:46,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:46,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659823557] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:46,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:46,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 6 [2022-01-18 14:43:46,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954898556] [2022-01-18 14:43:46,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:46,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:43:46,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:46,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:43:46,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:43:46,057 INFO L87 Difference]: Start difference. First operand 88 states and 174 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2022-01-18 14:43:46,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:46,128 INFO L93 Difference]: Finished difference Result 103 states and 190 transitions. [2022-01-18 14:43:46,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:43:46,128 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 17 [2022-01-18 14:43:46,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:46,129 INFO L225 Difference]: With dead ends: 103 [2022-01-18 14:43:46,129 INFO L226 Difference]: Without dead ends: 100 [2022-01-18 14:43:46,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:43:46,129 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:46,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 26 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:43:46,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-18 14:43:46,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 85. [2022-01-18 14:43:46,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0) internal successors, (168), 84 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:46,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 168 transitions. [2022-01-18 14:43:46,132 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 168 transitions. Word has length 17 [2022-01-18 14:43:46,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:46,132 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 168 transitions. [2022-01-18 14:43:46,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2022-01-18 14:43:46,132 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 168 transitions. [2022-01-18 14:43:46,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:43:46,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:46,133 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:46,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:46,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 14:43:46,340 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:46,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:46,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2109475171, now seen corresponding path program 9 times [2022-01-18 14:43:46,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:46,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473649970] [2022-01-18 14:43:46,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:46,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:46,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:46,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:46,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473649970] [2022-01-18 14:43:46,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473649970] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:46,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074821079] [2022-01-18 14:43:46,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:43:46,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:46,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:46,378 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) [2022-01-18 14:43:46,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 14:43:46,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:43:46,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:43:46,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:43:46,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:46,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:46,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074821079] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:46,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:46,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 6 [2022-01-18 14:43:46,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794181790] [2022-01-18 14:43:46,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:46,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:43:46,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:46,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:43:46,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:43:46,476 INFO L87 Difference]: Start difference. First operand 85 states and 168 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 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) [2022-01-18 14:43:46,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:46,585 INFO L93 Difference]: Finished difference Result 123 states and 233 transitions. [2022-01-18 14:43:46,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:43:46,586 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 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 17 [2022-01-18 14:43:46,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:46,586 INFO L225 Difference]: With dead ends: 123 [2022-01-18 14:43:46,586 INFO L226 Difference]: Without dead ends: 123 [2022-01-18 14:43:46,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:43:46,587 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:46,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 41 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:43:46,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-18 14:43:46,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 86. [2022-01-18 14:43:46,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.0) internal successors, (170), 85 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:46,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 170 transitions. [2022-01-18 14:43:46,589 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 170 transitions. Word has length 17 [2022-01-18 14:43:46,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:46,589 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 170 transitions. [2022-01-18 14:43:46,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 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) [2022-01-18 14:43:46,590 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 170 transitions. [2022-01-18 14:43:46,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:43:46,590 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:46,590 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:46,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:46,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 14:43:46,803 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:46,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:46,804 INFO L85 PathProgramCache]: Analyzing trace with hash 725577089, now seen corresponding path program 10 times [2022-01-18 14:43:46,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:46,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120740738] [2022-01-18 14:43:46,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:46,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:46,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:46,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:46,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:46,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120740738] [2022-01-18 14:43:46,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120740738] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:46,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123491260] [2022-01-18 14:43:46,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:43:46,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:46,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:46,826 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) [2022-01-18 14:43:46,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 14:43:46,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:43:46,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:43:46,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:43:46,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:46,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:46,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:46,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:46,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123491260] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:46,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:46,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 6 [2022-01-18 14:43:46,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64500567] [2022-01-18 14:43:46,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:46,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:43:46,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:46,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:43:46,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:43:46,910 INFO L87 Difference]: Start difference. First operand 86 states and 170 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 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) [2022-01-18 14:43:46,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:46,981 INFO L93 Difference]: Finished difference Result 116 states and 215 transitions. [2022-01-18 14:43:46,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:43:46,982 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 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 17 [2022-01-18 14:43:46,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:46,982 INFO L225 Difference]: With dead ends: 116 [2022-01-18 14:43:46,982 INFO L226 Difference]: Without dead ends: 114 [2022-01-18 14:43:46,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:43:46,984 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 40 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:46,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 32 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:43:46,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-18 14:43:46,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2022-01-18 14:43:46,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.988235294117647) internal successors, (169), 85 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:46,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 169 transitions. [2022-01-18 14:43:46,987 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 169 transitions. Word has length 17 [2022-01-18 14:43:46,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:46,988 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 169 transitions. [2022-01-18 14:43:46,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 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) [2022-01-18 14:43:46,988 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 169 transitions. [2022-01-18 14:43:46,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:43:46,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:46,988 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:47,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:47,203 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,SelfDestructingSolverStorable14 [2022-01-18 14:43:47,203 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:47,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:47,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1091400537, now seen corresponding path program 11 times [2022-01-18 14:43:47,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:47,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562299033] [2022-01-18 14:43:47,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:47,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:47,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:47,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:47,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562299033] [2022-01-18 14:43:47,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562299033] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:47,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479199044] [2022-01-18 14:43:47,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:43:47,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:47,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:47,228 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) [2022-01-18 14:43:47,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 14:43:47,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:43:47,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:43:47,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:43:47,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:47,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:47,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:47,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:47,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479199044] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:47,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:47,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 14:43:47,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684591201] [2022-01-18 14:43:47,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:47,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:43:47,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:47,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:43:47,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:43:47,317 INFO L87 Difference]: Start difference. First operand 86 states and 169 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2022-01-18 14:43:47,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:47,479 INFO L93 Difference]: Finished difference Result 114 states and 221 transitions. [2022-01-18 14:43:47,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:43:47,479 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 17 [2022-01-18 14:43:47,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:47,480 INFO L225 Difference]: With dead ends: 114 [2022-01-18 14:43:47,480 INFO L226 Difference]: Without dead ends: 114 [2022-01-18 14:43:47,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:43:47,480 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:47,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 28 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:43:47,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-18 14:43:47,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 80. [2022-01-18 14:43:47,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.9873417721518987) internal successors, (157), 79 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:47,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 157 transitions. [2022-01-18 14:43:47,483 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 157 transitions. Word has length 17 [2022-01-18 14:43:47,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:47,483 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 157 transitions. [2022-01-18 14:43:47,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2022-01-18 14:43:47,483 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 157 transitions. [2022-01-18 14:43:47,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 14:43:47,483 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:47,483 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:47,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:47,695 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,SelfDestructingSolverStorable15 [2022-01-18 14:43:47,695 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:47,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:47,696 INFO L85 PathProgramCache]: Analyzing trace with hash 219230823, now seen corresponding path program 12 times [2022-01-18 14:43:47,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:47,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095927961] [2022-01-18 14:43:47,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:47,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:47,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:47,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:47,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095927961] [2022-01-18 14:43:47,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095927961] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:47,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131788664] [2022-01-18 14:43:47,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:43:47,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:47,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:47,719 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) [2022-01-18 14:43:47,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 14:43:47,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:43:47,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:43:47,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:43:47,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:47,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:47,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:47,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131788664] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:47,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:47,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 14:43:47,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246710314] [2022-01-18 14:43:47,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:47,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:43:47,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:47,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:43:47,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:43:47,810 INFO L87 Difference]: Start difference. First operand 80 states and 157 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2022-01-18 14:43:47,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:47,893 INFO L93 Difference]: Finished difference Result 110 states and 202 transitions. [2022-01-18 14:43:47,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:43:47,893 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 17 [2022-01-18 14:43:47,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:47,893 INFO L225 Difference]: With dead ends: 110 [2022-01-18 14:43:47,893 INFO L226 Difference]: Without dead ends: 104 [2022-01-18 14:43:47,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:43:47,894 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:47,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 36 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:43:47,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-18 14:43:47,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 80. [2022-01-18 14:43:47,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.9620253164556962) internal successors, (155), 79 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) [2022-01-18 14:43:47,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 155 transitions. [2022-01-18 14:43:47,896 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 155 transitions. Word has length 17 [2022-01-18 14:43:47,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:47,896 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 155 transitions. [2022-01-18 14:43:47,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2022-01-18 14:43:47,897 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 155 transitions. [2022-01-18 14:43:47,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 14:43:47,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:47,897 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:47,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:48,107 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,SelfDestructingSolverStorable16 [2022-01-18 14:43:48,107 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:48,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:48,108 INFO L85 PathProgramCache]: Analyzing trace with hash -803742887, now seen corresponding path program 13 times [2022-01-18 14:43:48,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:48,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259150012] [2022-01-18 14:43:48,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:48,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:48,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:48,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:48,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259150012] [2022-01-18 14:43:48,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259150012] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:48,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913047398] [2022-01-18 14:43:48,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:43:48,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:48,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:48,145 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) [2022-01-18 14:43:48,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 14:43:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:48,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:43:48,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:48,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:48,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913047398] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:48,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:48,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 6 [2022-01-18 14:43:48,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530085060] [2022-01-18 14:43:48,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:48,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:43:48,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:48,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:43:48,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:43:48,354 INFO L87 Difference]: Start difference. First operand 80 states and 155 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2022-01-18 14:43:48,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:48,432 INFO L93 Difference]: Finished difference Result 171 states and 330 transitions. [2022-01-18 14:43:48,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:43:48,432 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 [2022-01-18 14:43:48,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:48,433 INFO L225 Difference]: With dead ends: 171 [2022-01-18 14:43:48,433 INFO L226 Difference]: Without dead ends: 164 [2022-01-18 14:43:48,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:43:48,433 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:48,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 44 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:43:48,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-18 14:43:48,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 122. [2022-01-18 14:43:48,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1074380165289255) internal successors, (255), 121 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:48,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 255 transitions. [2022-01-18 14:43:48,436 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 255 transitions. Word has length 19 [2022-01-18 14:43:48,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:48,437 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 255 transitions. [2022-01-18 14:43:48,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2022-01-18 14:43:48,437 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 255 transitions. [2022-01-18 14:43:48,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 14:43:48,437 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:48,437 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:48,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:48,647 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,SelfDestructingSolverStorable17 [2022-01-18 14:43:48,647 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:48,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:48,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1412057433, now seen corresponding path program 14 times [2022-01-18 14:43:48,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:48,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175557442] [2022-01-18 14:43:48,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:48,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:48,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:43:48,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:48,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175557442] [2022-01-18 14:43:48,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175557442] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:48,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096497086] [2022-01-18 14:43:48,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:43:48,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:48,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:48,703 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) [2022-01-18 14:43:48,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 14:43:48,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:43:48,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:43:48,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:43:48,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:48,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:48,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:43:48,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096497086] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:48,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:48,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 7 [2022-01-18 14:43:48,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962051591] [2022-01-18 14:43:48,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:48,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:43:48,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:48,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:43:48,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:43:48,983 INFO L87 Difference]: Start difference. First operand 122 states and 255 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2022-01-18 14:43:49,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:49,069 INFO L93 Difference]: Finished difference Result 227 states and 457 transitions. [2022-01-18 14:43:49,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:43:49,070 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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 [2022-01-18 14:43:49,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:49,070 INFO L225 Difference]: With dead ends: 227 [2022-01-18 14:43:49,071 INFO L226 Difference]: Without dead ends: 213 [2022-01-18 14:43:49,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:43:49,071 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:49,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 51 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:43:49,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-18 14:43:49,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 140. [2022-01-18 14:43:49,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.2014388489208634) internal successors, (306), 139 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:49,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 306 transitions. [2022-01-18 14:43:49,074 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 306 transitions. Word has length 19 [2022-01-18 14:43:49,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:49,074 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 306 transitions. [2022-01-18 14:43:49,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2022-01-18 14:43:49,075 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 306 transitions. [2022-01-18 14:43:49,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 14:43:49,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:49,075 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:49,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:49,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:49,291 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:49,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:49,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1871825753, now seen corresponding path program 15 times [2022-01-18 14:43:49,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:49,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311808537] [2022-01-18 14:43:49,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:49,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:43:49,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:49,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311808537] [2022-01-18 14:43:49,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311808537] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:49,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570671705] [2022-01-18 14:43:49,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:43:49,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:49,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:49,331 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) [2022-01-18 14:43:49,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:43:49,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:43:49,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 14:43:49,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:49,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 14:43:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:49,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:43:49,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570671705] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:49,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:49,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 6 [2022-01-18 14:43:49,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508481426] [2022-01-18 14:43:49,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:49,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:43:49,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:49,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:43:49,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:43:49,561 INFO L87 Difference]: Start difference. First operand 140 states and 306 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2022-01-18 14:43:49,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:49,621 INFO L93 Difference]: Finished difference Result 223 states and 465 transitions. [2022-01-18 14:43:49,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:43:49,621 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 [2022-01-18 14:43:49,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:49,622 INFO L225 Difference]: With dead ends: 223 [2022-01-18 14:43:49,622 INFO L226 Difference]: Without dead ends: 216 [2022-01-18 14:43:49,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:43:49,623 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:49,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 36 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:43:49,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-01-18 14:43:49,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 170. [2022-01-18 14:43:49,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.242603550295858) internal successors, (379), 169 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:49,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 379 transitions. [2022-01-18 14:43:49,632 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 379 transitions. Word has length 19 [2022-01-18 14:43:49,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:49,632 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 379 transitions. [2022-01-18 14:43:49,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2022-01-18 14:43:49,632 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 379 transitions. [2022-01-18 14:43:49,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:43:49,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:49,633 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:49,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:49,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:49,840 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:49,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:49,840 INFO L85 PathProgramCache]: Analyzing trace with hash -228874405, now seen corresponding path program 16 times [2022-01-18 14:43:49,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:49,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834325655] [2022-01-18 14:43:49,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:49,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:49,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:49,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834325655] [2022-01-18 14:43:49,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834325655] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:49,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172448696] [2022-01-18 14:43:49,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:43:49,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:49,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:49,872 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) [2022-01-18 14:43:49,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 14:43:49,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:43:49,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:43:49,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:43:49,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:49,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:50,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172448696] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:50,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:50,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-01-18 14:43:50,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330481167] [2022-01-18 14:43:50,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:50,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:43:50,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:50,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:43:50,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:43:50,014 INFO L87 Difference]: Start difference. First operand 170 states and 379 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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) [2022-01-18 14:43:50,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:50,620 INFO L93 Difference]: Finished difference Result 362 states and 721 transitions. [2022-01-18 14:43:50,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 14:43:50,621 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 21 [2022-01-18 14:43:50,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:50,622 INFO L225 Difference]: With dead ends: 362 [2022-01-18 14:43:50,622 INFO L226 Difference]: Without dead ends: 362 [2022-01-18 14:43:50,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1243, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 14:43:50,623 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 102 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:50,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 122 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:43:50,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-18 14:43:50,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 155. [2022-01-18 14:43:50,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.227272727272727) internal successors, (343), 154 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:50,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 343 transitions. [2022-01-18 14:43:50,627 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 343 transitions. Word has length 21 [2022-01-18 14:43:50,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:50,627 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 343 transitions. [2022-01-18 14:43:50,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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) [2022-01-18 14:43:50,628 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 343 transitions. [2022-01-18 14:43:50,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:43:50,628 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:50,628 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:50,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:50,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:50,835 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:50,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:50,836 INFO L85 PathProgramCache]: Analyzing trace with hash -225796457, now seen corresponding path program 17 times [2022-01-18 14:43:50,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:50,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098531223] [2022-01-18 14:43:50,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:50,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:50,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:50,871 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:50,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:50,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098531223] [2022-01-18 14:43:50,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098531223] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:50,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747546922] [2022-01-18 14:43:50,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:43:50,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:50,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:50,872 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) [2022-01-18 14:43:50,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 14:43:50,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:43:50,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:43:50,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:43:50,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:50,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:51,000 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:51,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747546922] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:51,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:51,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-01-18 14:43:51,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036051259] [2022-01-18 14:43:51,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:51,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:43:51,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:51,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:43:51,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:43:51,001 INFO L87 Difference]: Start difference. First operand 155 states and 343 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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) [2022-01-18 14:43:51,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:51,284 INFO L93 Difference]: Finished difference Result 331 states and 600 transitions. [2022-01-18 14:43:51,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 14:43:51,284 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 21 [2022-01-18 14:43:51,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:51,286 INFO L225 Difference]: With dead ends: 331 [2022-01-18 14:43:51,286 INFO L226 Difference]: Without dead ends: 299 [2022-01-18 14:43:51,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2022-01-18 14:43:51,286 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 108 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:51,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 137 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:43:51,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-01-18 14:43:51,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 179. [2022-01-18 14:43:51,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.134831460674157) internal successors, (380), 178 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:51,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 380 transitions. [2022-01-18 14:43:51,291 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 380 transitions. Word has length 21 [2022-01-18 14:43:51,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:51,291 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 380 transitions. [2022-01-18 14:43:51,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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) [2022-01-18 14:43:51,291 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 380 transitions. [2022-01-18 14:43:51,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:43:51,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:51,291 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:51,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:51,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:51,503 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:51,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:51,504 INFO L85 PathProgramCache]: Analyzing trace with hash 437743019, now seen corresponding path program 18 times [2022-01-18 14:43:51,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:51,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835024030] [2022-01-18 14:43:51,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:51,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:51,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:51,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835024030] [2022-01-18 14:43:51,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835024030] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:51,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641717478] [2022-01-18 14:43:51,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:43:51,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:51,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:51,527 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) [2022-01-18 14:43:51,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 14:43:51,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:43:51,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:43:51,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:43:51,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:51,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:51,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641717478] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:51,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:51,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 8 [2022-01-18 14:43:51,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757266978] [2022-01-18 14:43:51,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:51,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:43:51,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:51,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:43:51,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:43:51,654 INFO L87 Difference]: Start difference. First operand 179 states and 380 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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) [2022-01-18 14:43:51,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:51,841 INFO L93 Difference]: Finished difference Result 281 states and 529 transitions. [2022-01-18 14:43:51,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 14:43:51,841 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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 21 [2022-01-18 14:43:51,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:51,842 INFO L225 Difference]: With dead ends: 281 [2022-01-18 14:43:51,842 INFO L226 Difference]: Without dead ends: 281 [2022-01-18 14:43:51,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:43:51,843 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 108 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:51,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 83 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:43:51,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-01-18 14:43:51,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 177. [2022-01-18 14:43:51,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.1193181818181817) internal successors, (373), 176 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:51,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 373 transitions. [2022-01-18 14:43:51,847 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 373 transitions. Word has length 21 [2022-01-18 14:43:51,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:51,847 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 373 transitions. [2022-01-18 14:43:51,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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) [2022-01-18 14:43:51,847 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 373 transitions. [2022-01-18 14:43:51,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:43:51,847 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:51,847 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:51,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:52,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:52,051 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:52,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:52,052 INFO L85 PathProgramCache]: Analyzing trace with hash -946155063, now seen corresponding path program 19 times [2022-01-18 14:43:52,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:52,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683069466] [2022-01-18 14:43:52,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:52,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:52,073 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:52,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:52,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683069466] [2022-01-18 14:43:52,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683069466] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:52,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468560443] [2022-01-18 14:43:52,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:43:52,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:52,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:52,074 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) [2022-01-18 14:43:52,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 14:43:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:52,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:43:52,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:52,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:52,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468560443] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:52,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:52,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 8 [2022-01-18 14:43:52,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988987297] [2022-01-18 14:43:52,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:52,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:43:52,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:52,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:43:52,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:43:52,178 INFO L87 Difference]: Start difference. First operand 177 states and 373 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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) [2022-01-18 14:43:52,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:52,268 INFO L93 Difference]: Finished difference Result 197 states and 404 transitions. [2022-01-18 14:43:52,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:43:52,268 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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 21 [2022-01-18 14:43:52,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:52,269 INFO L225 Difference]: With dead ends: 197 [2022-01-18 14:43:52,269 INFO L226 Difference]: Without dead ends: 195 [2022-01-18 14:43:52,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:43:52,269 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:52,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 33 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:43:52,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-01-18 14:43:52,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 177. [2022-01-18 14:43:52,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.1136363636363638) internal successors, (372), 176 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:52,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 372 transitions. [2022-01-18 14:43:52,273 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 372 transitions. Word has length 21 [2022-01-18 14:43:52,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:52,273 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 372 transitions. [2022-01-18 14:43:52,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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) [2022-01-18 14:43:52,273 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 372 transitions. [2022-01-18 14:43:52,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:43:52,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:52,273 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:52,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:52,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:52,474 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:52,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:52,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1848273061, now seen corresponding path program 20 times [2022-01-18 14:43:52,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:52,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765366791] [2022-01-18 14:43:52,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:52,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:52,504 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:52,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:52,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765366791] [2022-01-18 14:43:52,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765366791] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:52,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766591593] [2022-01-18 14:43:52,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:43:52,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:52,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:52,505 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) [2022-01-18 14:43:52,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 14:43:52,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:43:52,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:43:52,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:43:52,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:52,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:52,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766591593] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:52,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:52,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 9 [2022-01-18 14:43:52,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989689146] [2022-01-18 14:43:52,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:52,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:43:52,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:52,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:43:52,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:43:52,654 INFO L87 Difference]: Start difference. First operand 177 states and 372 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2022-01-18 14:43:52,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:52,912 INFO L93 Difference]: Finished difference Result 411 states and 777 transitions. [2022-01-18 14:43:52,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 14:43:52,917 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 [2022-01-18 14:43:52,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:52,918 INFO L225 Difference]: With dead ends: 411 [2022-01-18 14:43:52,918 INFO L226 Difference]: Without dead ends: 411 [2022-01-18 14:43:52,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:43:52,919 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:52,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 103 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:43:52,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-01-18 14:43:52,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 178. [2022-01-18 14:43:52,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.1129943502824857) internal successors, (374), 177 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) [2022-01-18 14:43:52,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 374 transitions. [2022-01-18 14:43:52,924 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 374 transitions. Word has length 21 [2022-01-18 14:43:52,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:52,924 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 374 transitions. [2022-01-18 14:43:52,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2022-01-18 14:43:52,924 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 374 transitions. [2022-01-18 14:43:52,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:43:52,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:52,924 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:52,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:53,139 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,SelfDestructingSolverStorable24 [2022-01-18 14:43:53,139 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:53,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:53,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1145467753, now seen corresponding path program 21 times [2022-01-18 14:43:53,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:53,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92591196] [2022-01-18 14:43:53,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:53,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:53,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:53,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:53,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92591196] [2022-01-18 14:43:53,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92591196] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:53,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804136808] [2022-01-18 14:43:53,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:43:53,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:53,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:53,163 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) [2022-01-18 14:43:53,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:43:53,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:43:53,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:43:53,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:53,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 14:43:53,256 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:53,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:53,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804136808] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:53,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:53,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 9 [2022-01-18 14:43:53,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357084556] [2022-01-18 14:43:53,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:53,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:43:53,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:53,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:43:53,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:43:53,287 INFO L87 Difference]: Start difference. First operand 178 states and 374 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 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) [2022-01-18 14:43:53,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:53,517 INFO L93 Difference]: Finished difference Result 303 states and 564 transitions. [2022-01-18 14:43:53,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 14:43:53,517 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 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 [2022-01-18 14:43:53,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:53,518 INFO L225 Difference]: With dead ends: 303 [2022-01-18 14:43:53,518 INFO L226 Difference]: Without dead ends: 297 [2022-01-18 14:43:53,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:43:53,519 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 74 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:53,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 98 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:43:53,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-01-18 14:43:53,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 178. [2022-01-18 14:43:53,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.1073446327683616) internal successors, (373), 177 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:53,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 373 transitions. [2022-01-18 14:43:53,522 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 373 transitions. Word has length 21 [2022-01-18 14:43:53,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:53,523 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 373 transitions. [2022-01-18 14:43:53,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 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) [2022-01-18 14:43:53,523 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 373 transitions. [2022-01-18 14:43:53,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:43:53,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:53,523 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:53,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:53,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-18 14:43:53,739 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:53,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:53,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1884571683, now seen corresponding path program 22 times [2022-01-18 14:43:53,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:53,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408544779] [2022-01-18 14:43:53,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:53,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:53,764 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:53,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:53,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408544779] [2022-01-18 14:43:53,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408544779] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:53,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821764200] [2022-01-18 14:43:53,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:43:53,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:53,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:53,765 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) [2022-01-18 14:43:53,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:43:53,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:43:53,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:43:53,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:53,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 14:43:53,859 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:53,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:53,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:53,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821764200] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:53,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:53,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 9 [2022-01-18 14:43:53,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575352109] [2022-01-18 14:43:53,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:53,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:43:53,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:53,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:43:53,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:43:53,899 INFO L87 Difference]: Start difference. First operand 178 states and 373 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 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) [2022-01-18 14:43:54,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:54,208 INFO L93 Difference]: Finished difference Result 370 states and 696 transitions. [2022-01-18 14:43:54,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 14:43:54,208 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 14:43:54,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:54,209 INFO L225 Difference]: With dead ends: 370 [2022-01-18 14:43:54,209 INFO L226 Difference]: Without dead ends: 370 [2022-01-18 14:43:54,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:43:54,210 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 116 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:54,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 96 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:43:54,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-01-18 14:43:54,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 179. [2022-01-18 14:43:54,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.106741573033708) internal successors, (375), 178 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:54,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 375 transitions. [2022-01-18 14:43:54,214 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 375 transitions. Word has length 21 [2022-01-18 14:43:54,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:54,214 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 375 transitions. [2022-01-18 14:43:54,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 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) [2022-01-18 14:43:54,215 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 375 transitions. [2022-01-18 14:43:54,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:43:54,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:54,215 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:54,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:54,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 14:43:54,423 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:54,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:54,424 INFO L85 PathProgramCache]: Analyzing trace with hash 500673601, now seen corresponding path program 23 times [2022-01-18 14:43:54,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:54,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038899095] [2022-01-18 14:43:54,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:54,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:54,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:54,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:54,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038899095] [2022-01-18 14:43:54,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038899095] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:54,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178450693] [2022-01-18 14:43:54,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:43:54,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:54,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:54,449 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) [2022-01-18 14:43:54,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 14:43:54,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 14:43:54,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:43:54,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:43:54,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:54,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:54,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:54,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178450693] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:54,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:54,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 9 [2022-01-18 14:43:54,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128549321] [2022-01-18 14:43:54,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:54,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:43:54,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:54,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:43:54,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:43:54,587 INFO L87 Difference]: Start difference. First operand 179 states and 375 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 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) [2022-01-18 14:43:54,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:54,771 INFO L93 Difference]: Finished difference Result 285 states and 552 transitions. [2022-01-18 14:43:54,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:43:54,771 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 14:43:54,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:54,772 INFO L225 Difference]: With dead ends: 285 [2022-01-18 14:43:54,772 INFO L226 Difference]: Without dead ends: 281 [2022-01-18 14:43:54,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:43:54,772 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 76 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:54,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 79 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:43:54,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-01-18 14:43:54,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 179. [2022-01-18 14:43:54,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.101123595505618) internal successors, (374), 178 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) [2022-01-18 14:43:54,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 374 transitions. [2022-01-18 14:43:54,776 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 374 transitions. Word has length 21 [2022-01-18 14:43:54,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:54,776 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 374 transitions. [2022-01-18 14:43:54,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 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) [2022-01-18 14:43:54,777 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 374 transitions. [2022-01-18 14:43:54,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:43:54,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:54,777 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:54,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:54,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:54,991 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:54,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:54,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1316304025, now seen corresponding path program 24 times [2022-01-18 14:43:54,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:54,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434557838] [2022-01-18 14:43:54,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:54,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:54,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:55,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:55,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434557838] [2022-01-18 14:43:55,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434557838] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:55,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047813577] [2022-01-18 14:43:55,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:43:55,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:55,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:55,016 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) [2022-01-18 14:43:55,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 14:43:55,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 14:43:55,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:43:55,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:43:55,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:55,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:55,135 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:55,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047813577] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:55,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:55,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 14:43:55,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22973429] [2022-01-18 14:43:55,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:55,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:43:55,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:55,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:43:55,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:43:55,137 INFO L87 Difference]: Start difference. First operand 179 states and 374 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 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) [2022-01-18 14:43:55,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:55,512 INFO L93 Difference]: Finished difference Result 338 states and 638 transitions. [2022-01-18 14:43:55,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 14:43:55,519 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 14:43:55,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:55,520 INFO L225 Difference]: With dead ends: 338 [2022-01-18 14:43:55,520 INFO L226 Difference]: Without dead ends: 338 [2022-01-18 14:43:55,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=823, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 14:43:55,521 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 122 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:55,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 96 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:43:55,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-01-18 14:43:55,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 171. [2022-01-18 14:43:55,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.0647058823529414) internal successors, (351), 170 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:55,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 351 transitions. [2022-01-18 14:43:55,525 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 351 transitions. Word has length 21 [2022-01-18 14:43:55,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:55,525 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 351 transitions. [2022-01-18 14:43:55,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 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) [2022-01-18 14:43:55,525 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 351 transitions. [2022-01-18 14:43:55,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:43:55,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:55,525 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:55,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:55,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 14:43:55,741 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:55,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:55,742 INFO L85 PathProgramCache]: Analyzing trace with hash -5672665, now seen corresponding path program 25 times [2022-01-18 14:43:55,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:55,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018080153] [2022-01-18 14:43:55,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:55,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:55,776 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:55,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:55,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018080153] [2022-01-18 14:43:55,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018080153] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:55,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410949059] [2022-01-18 14:43:55,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:43:55,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:55,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:55,778 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) [2022-01-18 14:43:55,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 14:43:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:55,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:43:55,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:55,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:55,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:55,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410949059] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:55,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:55,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 14:43:55,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75817926] [2022-01-18 14:43:55,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:55,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:43:55,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:55,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:43:55,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:43:55,898 INFO L87 Difference]: Start difference. First operand 171 states and 351 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 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) [2022-01-18 14:43:56,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:56,073 INFO L93 Difference]: Finished difference Result 247 states and 473 transitions. [2022-01-18 14:43:56,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:43:56,073 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 14:43:56,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:56,074 INFO L225 Difference]: With dead ends: 247 [2022-01-18 14:43:56,074 INFO L226 Difference]: Without dead ends: 241 [2022-01-18 14:43:56,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:43:56,074 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 80 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:56,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 76 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:43:56,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-01-18 14:43:56,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 171. [2022-01-18 14:43:56,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.052941176470588) internal successors, (349), 170 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) [2022-01-18 14:43:56,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 349 transitions. [2022-01-18 14:43:56,078 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 349 transitions. Word has length 21 [2022-01-18 14:43:56,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:56,078 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 349 transitions. [2022-01-18 14:43:56,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 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) [2022-01-18 14:43:56,078 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 349 transitions. [2022-01-18 14:43:56,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:43:56,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:56,078 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:56,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:56,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:56,287 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:56,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:56,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1671495589, now seen corresponding path program 26 times [2022-01-18 14:43:56,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:56,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301696240] [2022-01-18 14:43:56,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:56,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:56,319 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:56,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:56,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301696240] [2022-01-18 14:43:56,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301696240] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:56,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339439662] [2022-01-18 14:43:56,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:43:56,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:56,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:56,321 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) [2022-01-18 14:43:56,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 14:43:56,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:43:56,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:43:56,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:43:56,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:56,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:56,445 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:56,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339439662] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:56,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:56,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 14:43:56,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976352862] [2022-01-18 14:43:56,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:56,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:43:56,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:56,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:43:56,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:43:56,446 INFO L87 Difference]: Start difference. First operand 171 states and 349 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2022-01-18 14:43:56,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:56,780 INFO L93 Difference]: Finished difference Result 290 states and 566 transitions. [2022-01-18 14:43:56,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 14:43:56,781 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 [2022-01-18 14:43:56,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:56,782 INFO L225 Difference]: With dead ends: 290 [2022-01-18 14:43:56,782 INFO L226 Difference]: Without dead ends: 290 [2022-01-18 14:43:56,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2022-01-18 14:43:56,782 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 99 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:56,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 49 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:43:56,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-01-18 14:43:56,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 165. [2022-01-18 14:43:56,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.018292682926829) internal successors, (331), 164 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:56,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 331 transitions. [2022-01-18 14:43:56,785 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 331 transitions. Word has length 21 [2022-01-18 14:43:56,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:56,786 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 331 transitions. [2022-01-18 14:43:56,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2022-01-18 14:43:56,786 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 331 transitions. [2022-01-18 14:43:56,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:43:56,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:56,786 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:56,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:57,001 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,SelfDestructingSolverStorable30 [2022-01-18 14:43:57,001 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:57,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:57,002 INFO L85 PathProgramCache]: Analyzing trace with hash -585460073, now seen corresponding path program 27 times [2022-01-18 14:43:57,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:57,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903538893] [2022-01-18 14:43:57,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:57,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:57,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:57,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:57,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903538893] [2022-01-18 14:43:57,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903538893] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:57,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82223284] [2022-01-18 14:43:57,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:43:57,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:57,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:57,029 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) [2022-01-18 14:43:57,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 14:43:57,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:43:57,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:43:57,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:43:57,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:57,125 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:57,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:57,167 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:57,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82223284] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:57,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:57,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 14:43:57,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420301055] [2022-01-18 14:43:57,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:57,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:43:57,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:57,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:43:57,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:43:57,168 INFO L87 Difference]: Start difference. First operand 165 states and 331 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 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) [2022-01-18 14:43:57,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:57,387 INFO L93 Difference]: Finished difference Result 226 states and 408 transitions. [2022-01-18 14:43:57,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:43:57,387 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 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 [2022-01-18 14:43:57,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:57,388 INFO L225 Difference]: With dead ends: 226 [2022-01-18 14:43:57,388 INFO L226 Difference]: Without dead ends: 217 [2022-01-18 14:43:57,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:43:57,389 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 70 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:57,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 93 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:43:57,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-01-18 14:43:57,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 150. [2022-01-18 14:43:57,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.0201342281879193) internal successors, (301), 149 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:57,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 301 transitions. [2022-01-18 14:43:57,391 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 301 transitions. Word has length 21 [2022-01-18 14:43:57,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:57,391 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 301 transitions. [2022-01-18 14:43:57,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 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) [2022-01-18 14:43:57,392 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 301 transitions. [2022-01-18 14:43:57,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:43:57,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:57,392 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:57,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:57,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:57,592 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:57,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:57,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1902418267, now seen corresponding path program 28 times [2022-01-18 14:43:57,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:57,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142794535] [2022-01-18 14:43:57,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:57,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:57,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:57,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142794535] [2022-01-18 14:43:57,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142794535] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:57,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335150996] [2022-01-18 14:43:57,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:43:57,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:57,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:57,613 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) [2022-01-18 14:43:57,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 14:43:57,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:43:57,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:43:57,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:43:57,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:57,684 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:57,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:57,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335150996] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:57,715 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:57,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 8 [2022-01-18 14:43:57,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692872824] [2022-01-18 14:43:57,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:57,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:43:57,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:57,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:43:57,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:43:57,716 INFO L87 Difference]: Start difference. First operand 150 states and 301 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 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) [2022-01-18 14:43:57,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:57,889 INFO L93 Difference]: Finished difference Result 260 states and 480 transitions. [2022-01-18 14:43:57,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 14:43:57,889 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 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 [2022-01-18 14:43:57,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:57,890 INFO L225 Difference]: With dead ends: 260 [2022-01-18 14:43:57,890 INFO L226 Difference]: Without dead ends: 260 [2022-01-18 14:43:57,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:43:57,890 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:57,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 72 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:43:57,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-01-18 14:43:57,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 150. [2022-01-18 14:43:57,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.0134228187919465) internal successors, (300), 149 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:57,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 300 transitions. [2022-01-18 14:43:57,893 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 300 transitions. Word has length 21 [2022-01-18 14:43:57,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:57,893 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 300 transitions. [2022-01-18 14:43:57,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 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) [2022-01-18 14:43:57,893 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 300 transitions. [2022-01-18 14:43:57,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:43:57,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:57,894 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:57,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-01-18 14:43:58,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:58,109 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:58,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:58,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1689743721, now seen corresponding path program 29 times [2022-01-18 14:43:58,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:58,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680885772] [2022-01-18 14:43:58,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:58,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:58,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:58,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680885772] [2022-01-18 14:43:58,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680885772] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:58,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345631533] [2022-01-18 14:43:58,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:43:58,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:58,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:58,136 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) [2022-01-18 14:43:58,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 14:43:58,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:43:58,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:43:58,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:43:58,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:58,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:58,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:58,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345631533] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:58,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:58,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 8 [2022-01-18 14:43:58,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512992293] [2022-01-18 14:43:58,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:58,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:43:58,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:58,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:43:58,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:43:58,259 INFO L87 Difference]: Start difference. First operand 150 states and 300 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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) [2022-01-18 14:43:58,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:58,404 INFO L93 Difference]: Finished difference Result 192 states and 355 transitions. [2022-01-18 14:43:58,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:43:58,404 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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 21 [2022-01-18 14:43:58,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:58,405 INFO L225 Difference]: With dead ends: 192 [2022-01-18 14:43:58,405 INFO L226 Difference]: Without dead ends: 189 [2022-01-18 14:43:58,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:43:58,405 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:58,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 54 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:43:58,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-18 14:43:58,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 147. [2022-01-18 14:43:58,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.0136986301369864) internal successors, (294), 146 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:58,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 294 transitions. [2022-01-18 14:43:58,408 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 294 transitions. Word has length 21 [2022-01-18 14:43:58,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:58,408 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 294 transitions. [2022-01-18 14:43:58,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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) [2022-01-18 14:43:58,408 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 294 transitions. [2022-01-18 14:43:58,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:43:58,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:58,408 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:58,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-18 14:43:58,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:58,609 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:58,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:58,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1340295715, now seen corresponding path program 30 times [2022-01-18 14:43:58,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:58,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522955196] [2022-01-18 14:43:58,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:58,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:58,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:58,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:58,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522955196] [2022-01-18 14:43:58,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522955196] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:58,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438229504] [2022-01-18 14:43:58,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:43:58,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:58,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:58,632 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) [2022-01-18 14:43:58,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 14:43:58,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:43:58,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:43:58,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:43:58,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:58,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:58,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438229504] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:58,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:58,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 8 [2022-01-18 14:43:58,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88533219] [2022-01-18 14:43:58,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:58,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:43:58,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:58,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:43:58,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:43:58,741 INFO L87 Difference]: Start difference. First operand 147 states and 294 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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) [2022-01-18 14:43:58,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:58,985 INFO L93 Difference]: Finished difference Result 226 states and 426 transitions. [2022-01-18 14:43:58,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 14:43:58,985 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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 21 [2022-01-18 14:43:58,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:58,986 INFO L225 Difference]: With dead ends: 226 [2022-01-18 14:43:58,986 INFO L226 Difference]: Without dead ends: 226 [2022-01-18 14:43:58,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:43:58,986 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:58,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 72 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:43:58,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-01-18 14:43:58,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 148. [2022-01-18 14:43:58,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.0136054421768708) internal successors, (296), 147 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:58,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 296 transitions. [2022-01-18 14:43:58,989 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 296 transitions. Word has length 21 [2022-01-18 14:43:58,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:58,989 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 296 transitions. [2022-01-18 14:43:58,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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) [2022-01-18 14:43:58,989 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 296 transitions. [2022-01-18 14:43:58,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:43:58,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:58,989 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:59,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:59,202 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,SelfDestructingSolverStorable34 [2022-01-18 14:43:59,202 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:59,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:59,203 INFO L85 PathProgramCache]: Analyzing trace with hash -43602367, now seen corresponding path program 31 times [2022-01-18 14:43:59,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:59,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649995702] [2022-01-18 14:43:59,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:59,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:59,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:59,223 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:59,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:59,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649995702] [2022-01-18 14:43:59,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649995702] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:59,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511951897] [2022-01-18 14:43:59,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:43:59,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:59,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:59,225 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) [2022-01-18 14:43:59,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 14:43:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:59,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:43:59,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:59,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:59,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511951897] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:59,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:59,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 8 [2022-01-18 14:43:59,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374511128] [2022-01-18 14:43:59,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:59,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:43:59,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:59,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:43:59,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:43:59,348 INFO L87 Difference]: Start difference. First operand 148 states and 296 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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) [2022-01-18 14:43:59,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:43:59,487 INFO L93 Difference]: Finished difference Result 218 states and 400 transitions. [2022-01-18 14:43:59,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:43:59,487 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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 21 [2022-01-18 14:43:59,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:43:59,488 INFO L225 Difference]: With dead ends: 218 [2022-01-18 14:43:59,488 INFO L226 Difference]: Without dead ends: 216 [2022-01-18 14:43:59,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:43:59,489 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 79 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:43:59,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 66 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:43:59,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-01-18 14:43:59,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 148. [2022-01-18 14:43:59,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.006802721088435) internal successors, (295), 147 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:43:59,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 295 transitions. [2022-01-18 14:43:59,491 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 295 transitions. Word has length 21 [2022-01-18 14:43:59,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:43:59,492 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 295 transitions. [2022-01-18 14:43:59,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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) [2022-01-18 14:43:59,492 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 295 transitions. [2022-01-18 14:43:59,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:43:59,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:43:59,492 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:43:59,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 14:43:59,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 14:43:59,708 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:43:59,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:43:59,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1860579993, now seen corresponding path program 32 times [2022-01-18 14:43:59,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:43:59,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034695830] [2022-01-18 14:43:59,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:43:59,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:43:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:43:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:59,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:43:59,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034695830] [2022-01-18 14:43:59,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034695830] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:43:59,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147189679] [2022-01-18 14:43:59,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:43:59,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:43:59,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:43:59,732 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) [2022-01-18 14:43:59,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 14:43:59,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:43:59,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:43:59,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:43:59,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:43:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:43:59,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:43:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:43:59,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147189679] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:43:59,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:43:59,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 9 [2022-01-18 14:43:59,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479017474] [2022-01-18 14:43:59,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:43:59,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:43:59,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:43:59,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:43:59,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:43:59,857 INFO L87 Difference]: Start difference. First operand 148 states and 295 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 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) [2022-01-18 14:44:00,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:00,403 INFO L93 Difference]: Finished difference Result 330 states and 627 transitions. [2022-01-18 14:44:00,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 14:44:00,403 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 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 21 [2022-01-18 14:44:00,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:00,404 INFO L225 Difference]: With dead ends: 330 [2022-01-18 14:44:00,404 INFO L226 Difference]: Without dead ends: 330 [2022-01-18 14:44:00,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=556, Invalid=1994, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 14:44:00,405 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 117 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:00,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 111 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:44:00,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-01-18 14:44:00,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 150. [2022-01-18 14:44:00,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.0067114093959733) internal successors, (299), 149 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:00,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 299 transitions. [2022-01-18 14:44:00,408 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 299 transitions. Word has length 21 [2022-01-18 14:44:00,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:00,408 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 299 transitions. [2022-01-18 14:44:00,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 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) [2022-01-18 14:44:00,408 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 299 transitions. [2022-01-18 14:44:00,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:44:00,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:00,408 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:00,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-18 14:44:00,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:00,624 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:00,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:00,624 INFO L85 PathProgramCache]: Analyzing trace with hash -549948633, now seen corresponding path program 33 times [2022-01-18 14:44:00,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:00,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567617513] [2022-01-18 14:44:00,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:00,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:00,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:00,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567617513] [2022-01-18 14:44:00,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567617513] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:00,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821474314] [2022-01-18 14:44:00,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:44:00,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:00,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:00,649 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) [2022-01-18 14:44:00,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 14:44:00,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:44:00,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:00,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:44:00,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:00,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:00,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:00,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821474314] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:00,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:00,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 9 [2022-01-18 14:44:00,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853878108] [2022-01-18 14:44:00,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:00,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:44:00,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:00,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:44:00,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:44:00,781 INFO L87 Difference]: Start difference. First operand 150 states and 299 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 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) [2022-01-18 14:44:01,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:01,004 INFO L93 Difference]: Finished difference Result 267 states and 479 transitions. [2022-01-18 14:44:01,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 14:44:01,004 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 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 21 [2022-01-18 14:44:01,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:01,005 INFO L225 Difference]: With dead ends: 267 [2022-01-18 14:44:01,005 INFO L226 Difference]: Without dead ends: 247 [2022-01-18 14:44:01,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2022-01-18 14:44:01,006 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 83 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:01,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 119 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:44:01,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-01-18 14:44:01,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 152. [2022-01-18 14:44:01,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.9867549668874172) internal successors, (300), 151 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:01,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 300 transitions. [2022-01-18 14:44:01,008 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 300 transitions. Word has length 21 [2022-01-18 14:44:01,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:01,008 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 300 transitions. [2022-01-18 14:44:01,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 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) [2022-01-18 14:44:01,008 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 300 transitions. [2022-01-18 14:44:01,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:44:01,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:01,009 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:01,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-18 14:44:01,215 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,SelfDestructingSolverStorable37 [2022-01-18 14:44:01,216 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:01,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:01,216 INFO L85 PathProgramCache]: Analyzing trace with hash 703617571, now seen corresponding path program 34 times [2022-01-18 14:44:01,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:01,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195008136] [2022-01-18 14:44:01,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:01,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:01,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:01,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195008136] [2022-01-18 14:44:01,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195008136] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:01,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59037439] [2022-01-18 14:44:01,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:44:01,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:01,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:01,255 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) [2022-01-18 14:44:01,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 14:44:01,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:44:01,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:01,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:44:01,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:01,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:01,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59037439] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:01,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:01,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-01-18 14:44:01,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141680220] [2022-01-18 14:44:01,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:01,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:44:01,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:01,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:44:01,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:44:01,365 INFO L87 Difference]: Start difference. First operand 152 states and 300 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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) [2022-01-18 14:44:01,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:01,856 INFO L93 Difference]: Finished difference Result 228 states and 442 transitions. [2022-01-18 14:44:01,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 14:44:01,857 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 21 [2022-01-18 14:44:01,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:01,857 INFO L225 Difference]: With dead ends: 228 [2022-01-18 14:44:01,858 INFO L226 Difference]: Without dead ends: 226 [2022-01-18 14:44:01,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1243, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 14:44:01,858 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:01,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 57 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:44:01,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-01-18 14:44:01,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 136. [2022-01-18 14:44:01,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.9925925925925927) internal successors, (269), 135 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:01,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 269 transitions. [2022-01-18 14:44:01,861 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 269 transitions. Word has length 21 [2022-01-18 14:44:01,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:01,861 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 269 transitions. [2022-01-18 14:44:01,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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) [2022-01-18 14:44:01,861 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 269 transitions. [2022-01-18 14:44:01,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:44:01,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:01,861 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:01,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 14:44:02,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 14:44:02,077 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:02,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:02,077 INFO L85 PathProgramCache]: Analyzing trace with hash -777170013, now seen corresponding path program 35 times [2022-01-18 14:44:02,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:02,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070842028] [2022-01-18 14:44:02,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:02,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:02,104 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:02,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:02,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070842028] [2022-01-18 14:44:02,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070842028] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:02,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967859982] [2022-01-18 14:44:02,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:44:02,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:02,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:02,106 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) [2022-01-18 14:44:02,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 14:44:02,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:44:02,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:02,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:44:02,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:02,189 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:02,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:02,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967859982] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:02,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:02,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-01-18 14:44:02,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733297241] [2022-01-18 14:44:02,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:02,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:44:02,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:02,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:44:02,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:44:02,235 INFO L87 Difference]: Start difference. First operand 136 states and 269 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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) [2022-01-18 14:44:02,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:02,398 INFO L93 Difference]: Finished difference Result 197 states and 363 transitions. [2022-01-18 14:44:02,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 14:44:02,399 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 21 [2022-01-18 14:44:02,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:02,399 INFO L225 Difference]: With dead ends: 197 [2022-01-18 14:44:02,399 INFO L226 Difference]: Without dead ends: 187 [2022-01-18 14:44:02,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:44:02,400 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 80 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:02,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 78 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:44:02,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-18 14:44:02,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 136. [2022-01-18 14:44:02,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.9777777777777779) internal successors, (267), 135 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:02,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 267 transitions. [2022-01-18 14:44:02,402 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 267 transitions. Word has length 21 [2022-01-18 14:44:02,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:02,402 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 267 transitions. [2022-01-18 14:44:02,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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) [2022-01-18 14:44:02,402 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 267 transitions. [2022-01-18 14:44:02,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 14:44:02,403 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:02,403 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:02,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 14:44:02,610 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,SelfDestructingSolverStorable39 [2022-01-18 14:44:02,610 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:02,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:02,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1827966439, now seen corresponding path program 36 times [2022-01-18 14:44:02,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:02,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992145575] [2022-01-18 14:44:02,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:02,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:02,650 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:02,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:02,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992145575] [2022-01-18 14:44:02,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992145575] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:02,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110478274] [2022-01-18 14:44:02,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:44:02,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:02,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:02,651 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) [2022-01-18 14:44:02,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 14:44:02,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:44:02,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:02,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 14:44:02,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:02,876 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:02,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:02,941 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:02,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110478274] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:02,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:02,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 8 [2022-01-18 14:44:02,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085836093] [2022-01-18 14:44:02,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:02,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:44:02,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:02,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:44:02,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:44:02,942 INFO L87 Difference]: Start difference. First operand 136 states and 267 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 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) [2022-01-18 14:44:03,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:03,054 INFO L93 Difference]: Finished difference Result 275 states and 535 transitions. [2022-01-18 14:44:03,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:44:03,054 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 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 [2022-01-18 14:44:03,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:03,055 INFO L225 Difference]: With dead ends: 275 [2022-01-18 14:44:03,055 INFO L226 Difference]: Without dead ends: 268 [2022-01-18 14:44:03,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:44:03,055 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:03,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 69 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:44:03,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-01-18 14:44:03,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 207. [2022-01-18 14:44:03,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.0970873786407767) internal successors, (432), 206 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:03,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 432 transitions. [2022-01-18 14:44:03,058 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 432 transitions. Word has length 23 [2022-01-18 14:44:03,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:03,059 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 432 transitions. [2022-01-18 14:44:03,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 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) [2022-01-18 14:44:03,059 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 432 transitions. [2022-01-18 14:44:03,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 14:44:03,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:03,059 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:03,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-01-18 14:44:03,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:03,271 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:03,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:03,272 INFO L85 PathProgramCache]: Analyzing trace with hash 366507801, now seen corresponding path program 37 times [2022-01-18 14:44:03,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:03,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621453669] [2022-01-18 14:44:03,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:03,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:03,320 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:44:03,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:03,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621453669] [2022-01-18 14:44:03,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621453669] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:03,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462465200] [2022-01-18 14:44:03,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:44:03,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:03,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:03,321 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) [2022-01-18 14:44:03,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 14:44:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:03,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 14:44:03,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:03,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:44:03,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462465200] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:03,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:03,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 9 [2022-01-18 14:44:03,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936632043] [2022-01-18 14:44:03,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:03,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:44:03,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:03,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:44:03,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:44:03,646 INFO L87 Difference]: Start difference. First operand 207 states and 432 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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) [2022-01-18 14:44:03,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:03,819 INFO L93 Difference]: Finished difference Result 342 states and 691 transitions. [2022-01-18 14:44:03,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:44:03,819 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 23 [2022-01-18 14:44:03,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:03,820 INFO L225 Difference]: With dead ends: 342 [2022-01-18 14:44:03,820 INFO L226 Difference]: Without dead ends: 328 [2022-01-18 14:44:03,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 8 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:44:03,821 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 54 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:03,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 88 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:44:03,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-01-18 14:44:03,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 235. [2022-01-18 14:44:03,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.1794871794871793) internal successors, (510), 234 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:03,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 510 transitions. [2022-01-18 14:44:03,824 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 510 transitions. Word has length 23 [2022-01-18 14:44:03,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:03,824 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 510 transitions. [2022-01-18 14:44:03,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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) [2022-01-18 14:44:03,824 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 510 transitions. [2022-01-18 14:44:03,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 14:44:03,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:03,825 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:03,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 14:44:04,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:04,025 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:04,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:04,026 INFO L85 PathProgramCache]: Analyzing trace with hash 487938585, now seen corresponding path program 38 times [2022-01-18 14:44:04,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:04,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530407030] [2022-01-18 14:44:04,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:04,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:04,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:44:04,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:04,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530407030] [2022-01-18 14:44:04,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530407030] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:04,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677164331] [2022-01-18 14:44:04,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:44:04,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:04,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:04,067 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) [2022-01-18 14:44:04,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 14:44:04,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:44:04,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:04,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 14:44:04,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:04,468 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:04,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:44:04,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677164331] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:04,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:04,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 10 [2022-01-18 14:44:04,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283833474] [2022-01-18 14:44:04,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:04,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:44:04,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:04,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:44:04,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:44:04,526 INFO L87 Difference]: Start difference. First operand 235 states and 510 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:04,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:04,694 INFO L93 Difference]: Finished difference Result 406 states and 838 transitions. [2022-01-18 14:44:04,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:44:04,695 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 14:44:04,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:04,696 INFO L225 Difference]: With dead ends: 406 [2022-01-18 14:44:04,696 INFO L226 Difference]: Without dead ends: 392 [2022-01-18 14:44:04,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:44:04,696 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 70 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:04,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 91 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:44:04,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-01-18 14:44:04,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 267. [2022-01-18 14:44:04,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.2330827067669174) internal successors, (594), 266 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:04,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 594 transitions. [2022-01-18 14:44:04,700 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 594 transitions. Word has length 23 [2022-01-18 14:44:04,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:04,700 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 594 transitions. [2022-01-18 14:44:04,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:04,700 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 594 transitions. [2022-01-18 14:44:04,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 14:44:04,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:04,701 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:04,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-01-18 14:44:04,917 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,SelfDestructingSolverStorable42 [2022-01-18 14:44:04,917 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:04,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:04,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1218805017, now seen corresponding path program 39 times [2022-01-18 14:44:04,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:04,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561779426] [2022-01-18 14:44:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:04,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:44:04,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:04,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561779426] [2022-01-18 14:44:04,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561779426] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:04,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545876503] [2022-01-18 14:44:04,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:44:04,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:04,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:04,954 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) [2022-01-18 14:44:04,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 14:44:04,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:44:04,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:04,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 14:44:04,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:05,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:44:05,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545876503] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:05,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:05,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 8 [2022-01-18 14:44:05,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895639127] [2022-01-18 14:44:05,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:05,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:44:05,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:05,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:44:05,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:44:05,264 INFO L87 Difference]: Start difference. First operand 267 states and 594 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2022-01-18 14:44:05,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:05,391 INFO L93 Difference]: Finished difference Result 393 states and 836 transitions. [2022-01-18 14:44:05,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:44:05,391 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 [2022-01-18 14:44:05,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:05,393 INFO L225 Difference]: With dead ends: 393 [2022-01-18 14:44:05,393 INFO L226 Difference]: Without dead ends: 386 [2022-01-18 14:44:05,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:44:05,393 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:05,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 78 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:44:05,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-01-18 14:44:05,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 315. [2022-01-18 14:44:05,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.261146496815287) internal successors, (710), 314 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:05,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 710 transitions. [2022-01-18 14:44:05,397 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 710 transitions. Word has length 23 [2022-01-18 14:44:05,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:05,397 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 710 transitions. [2022-01-18 14:44:05,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2022-01-18 14:44:05,397 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 710 transitions. [2022-01-18 14:44:05,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:05,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:05,398 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:05,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-18 14:44:05,611 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,SelfDestructingSolverStorable43 [2022-01-18 14:44:05,611 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:05,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:05,612 INFO L85 PathProgramCache]: Analyzing trace with hash 379940123, now seen corresponding path program 40 times [2022-01-18 14:44:05,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:05,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697135725] [2022-01-18 14:44:05,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:05,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:05,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:05,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:05,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697135725] [2022-01-18 14:44:05,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697135725] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:05,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607459636] [2022-01-18 14:44:05,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:44:05,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:05,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:05,658 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) [2022-01-18 14:44:05,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 14:44:05,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:44:05,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:05,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:05,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:05,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:05,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607459636] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:05,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:05,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-01-18 14:44:05,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431336794] [2022-01-18 14:44:05,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:05,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:44:05,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:05,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:44:05,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:44:05,841 INFO L87 Difference]: Start difference. First operand 315 states and 710 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) [2022-01-18 14:44:07,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:07,127 INFO L93 Difference]: Finished difference Result 706 states and 1433 transitions. [2022-01-18 14:44:07,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 14:44:07,128 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 25 [2022-01-18 14:44:07,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:07,129 INFO L225 Difference]: With dead ends: 706 [2022-01-18 14:44:07,129 INFO L226 Difference]: Without dead ends: 706 [2022-01-18 14:44:07,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 36 SyntacticMatches, 10 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1295 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1014, Invalid=3956, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 14:44:07,131 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 152 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:07,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 222 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:44:07,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-01-18 14:44:07,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 284. [2022-01-18 14:44:07,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.2508833922261484) internal successors, (637), 283 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:07,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 637 transitions. [2022-01-18 14:44:07,136 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 637 transitions. Word has length 25 [2022-01-18 14:44:07,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:07,136 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 637 transitions. [2022-01-18 14:44:07,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) [2022-01-18 14:44:07,136 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 637 transitions. [2022-01-18 14:44:07,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:07,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:07,136 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:07,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-01-18 14:44:07,337 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,SelfDestructingSolverStorable44 [2022-01-18 14:44:07,337 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:07,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:07,337 INFO L85 PathProgramCache]: Analyzing trace with hash -957119145, now seen corresponding path program 41 times [2022-01-18 14:44:07,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:07,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768051780] [2022-01-18 14:44:07,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:07,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:07,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:07,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768051780] [2022-01-18 14:44:07,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768051780] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:07,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178436496] [2022-01-18 14:44:07,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:44:07,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:07,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:07,381 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) [2022-01-18 14:44:07,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 14:44:07,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 14:44:07,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:07,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:07,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:07,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:07,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178436496] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:07,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:07,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-01-18 14:44:07,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907675667] [2022-01-18 14:44:07,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:07,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:44:07,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:07,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:44:07,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:44:07,531 INFO L87 Difference]: Start difference. First operand 284 states and 637 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) [2022-01-18 14:44:08,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:08,101 INFO L93 Difference]: Finished difference Result 631 states and 1169 transitions. [2022-01-18 14:44:08,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 14:44:08,102 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 25 [2022-01-18 14:44:08,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:08,103 INFO L225 Difference]: With dead ends: 631 [2022-01-18 14:44:08,103 INFO L226 Difference]: Without dead ends: 575 [2022-01-18 14:44:08,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=474, Invalid=1976, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 14:44:08,104 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 187 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:08,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 235 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:44:08,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-01-18 14:44:08,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 332. [2022-01-18 14:44:08,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.1691842900302114) internal successors, (718), 331 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:08,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 718 transitions. [2022-01-18 14:44:08,109 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 718 transitions. Word has length 25 [2022-01-18 14:44:08,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:08,109 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 718 transitions. [2022-01-18 14:44:08,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) [2022-01-18 14:44:08,109 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 718 transitions. [2022-01-18 14:44:08,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:08,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:08,110 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:08,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-01-18 14:44:08,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 14:44:08,315 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:08,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:08,316 INFO L85 PathProgramCache]: Analyzing trace with hash 736582831, now seen corresponding path program 42 times [2022-01-18 14:44:08,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:08,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908777643] [2022-01-18 14:44:08,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:08,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:08,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:08,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:08,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908777643] [2022-01-18 14:44:08,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908777643] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:08,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006775568] [2022-01-18 14:44:08,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:44:08,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:08,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:08,348 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:44:08,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 14:44:08,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 14:44:08,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:08,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:08,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:08,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:08,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006775568] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:08,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:08,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 6] total 10 [2022-01-18 14:44:08,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296110667] [2022-01-18 14:44:08,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:08,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:44:08,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:08,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:44:08,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:44:08,501 INFO L87 Difference]: Start difference. First operand 332 states and 718 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2022-01-18 14:44:08,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:08,913 INFO L93 Difference]: Finished difference Result 585 states and 1122 transitions. [2022-01-18 14:44:08,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 14:44:08,915 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 25 [2022-01-18 14:44:08,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:08,917 INFO L225 Difference]: With dead ends: 585 [2022-01-18 14:44:08,917 INFO L226 Difference]: Without dead ends: 585 [2022-01-18 14:44:08,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=337, Invalid=1469, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 14:44:08,918 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 161 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:08,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 130 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:44:08,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-01-18 14:44:08,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 329. [2022-01-18 14:44:08,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.158536585365854) internal successors, (708), 328 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:08,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 708 transitions. [2022-01-18 14:44:08,922 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 708 transitions. Word has length 25 [2022-01-18 14:44:08,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:08,922 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 708 transitions. [2022-01-18 14:44:08,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2022-01-18 14:44:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 708 transitions. [2022-01-18 14:44:08,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:08,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:08,923 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:08,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-18 14:44:09,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:09,138 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:09,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:09,139 INFO L85 PathProgramCache]: Analyzing trace with hash -647315251, now seen corresponding path program 43 times [2022-01-18 14:44:09,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:09,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182035564] [2022-01-18 14:44:09,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:09,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:09,173 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:09,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:09,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182035564] [2022-01-18 14:44:09,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182035564] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:09,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356085735] [2022-01-18 14:44:09,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:44:09,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:09,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:09,175 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) [2022-01-18 14:44:09,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 14:44:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:09,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:09,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:09,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:09,334 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:09,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356085735] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:09,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:09,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 6] total 10 [2022-01-18 14:44:09,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194507708] [2022-01-18 14:44:09,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:09,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:44:09,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:09,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:44:09,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:44:09,335 INFO L87 Difference]: Start difference. First operand 329 states and 708 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2022-01-18 14:44:09,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:09,440 INFO L93 Difference]: Finished difference Result 364 states and 764 transitions. [2022-01-18 14:44:09,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:44:09,440 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 25 [2022-01-18 14:44:09,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:09,441 INFO L225 Difference]: With dead ends: 364 [2022-01-18 14:44:09,441 INFO L226 Difference]: Without dead ends: 362 [2022-01-18 14:44:09,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:44:09,442 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 27 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:09,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 38 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:44:09,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-18 14:44:09,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 329. [2022-01-18 14:44:09,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.1554878048780486) internal successors, (707), 328 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:09,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 707 transitions. [2022-01-18 14:44:09,446 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 707 transitions. Word has length 25 [2022-01-18 14:44:09,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:09,446 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 707 transitions. [2022-01-18 14:44:09,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2022-01-18 14:44:09,446 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 707 transitions. [2022-01-18 14:44:09,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:09,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:09,447 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:09,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 14:44:09,647 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,SelfDestructingSolverStorable47 [2022-01-18 14:44:09,647 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:09,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:09,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1599122149, now seen corresponding path program 44 times [2022-01-18 14:44:09,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:09,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239124946] [2022-01-18 14:44:09,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:09,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:09,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:09,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:09,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239124946] [2022-01-18 14:44:09,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239124946] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:09,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921529859] [2022-01-18 14:44:09,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:44:09,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:09,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:09,674 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) [2022-01-18 14:44:09,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 14:44:09,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:44:09,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:09,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:09,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:09,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:09,826 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:09,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921529859] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:09,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:09,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 6] total 11 [2022-01-18 14:44:09,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97315211] [2022-01-18 14:44:09,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:09,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:44:09,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:09,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:44:09,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:44:09,827 INFO L87 Difference]: Start difference. First operand 329 states and 707 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:10,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:10,437 INFO L93 Difference]: Finished difference Result 710 states and 1347 transitions. [2022-01-18 14:44:10,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 14:44:10,437 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 14:44:10,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:10,439 INFO L225 Difference]: With dead ends: 710 [2022-01-18 14:44:10,439 INFO L226 Difference]: Without dead ends: 710 [2022-01-18 14:44:10,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=331, Invalid=1391, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 14:44:10,440 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 155 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:10,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 201 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:44:10,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-01-18 14:44:10,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 330. [2022-01-18 14:44:10,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.155015197568389) internal successors, (709), 329 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:10,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 709 transitions. [2022-01-18 14:44:10,445 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 709 transitions. Word has length 25 [2022-01-18 14:44:10,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:10,445 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 709 transitions. [2022-01-18 14:44:10,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:10,445 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 709 transitions. [2022-01-18 14:44:10,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:10,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:10,446 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:10,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-18 14:44:10,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-01-18 14:44:10,655 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:10,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:10,656 INFO L85 PathProgramCache]: Analyzing trace with hash -896316841, now seen corresponding path program 45 times [2022-01-18 14:44:10,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:10,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271446380] [2022-01-18 14:44:10,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:10,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:10,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:10,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271446380] [2022-01-18 14:44:10,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271446380] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:10,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889295607] [2022-01-18 14:44:10,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:44:10,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:10,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:10,689 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) [2022-01-18 14:44:10,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 14:44:10,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 14:44:10,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:10,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:10,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:10,786 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:10,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:10,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889295607] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:10,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:10,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 6] total 11 [2022-01-18 14:44:10,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771559778] [2022-01-18 14:44:10,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:10,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:44:10,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:10,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:44:10,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:44:10,829 INFO L87 Difference]: Start difference. First operand 330 states and 709 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2022-01-18 14:44:11,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:11,272 INFO L93 Difference]: Finished difference Result 591 states and 1121 transitions. [2022-01-18 14:44:11,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 14:44:11,273 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 25 [2022-01-18 14:44:11,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:11,274 INFO L225 Difference]: With dead ends: 591 [2022-01-18 14:44:11,274 INFO L226 Difference]: Without dead ends: 585 [2022-01-18 14:44:11,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=244, Invalid=1238, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 14:44:11,275 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 113 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:11,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 168 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:44:11,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-01-18 14:44:11,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 330. [2022-01-18 14:44:11,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.1519756838905777) internal successors, (708), 329 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:11,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 708 transitions. [2022-01-18 14:44:11,280 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 708 transitions. Word has length 25 [2022-01-18 14:44:11,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:11,280 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 708 transitions. [2022-01-18 14:44:11,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2022-01-18 14:44:11,280 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 708 transitions. [2022-01-18 14:44:11,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:11,280 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:11,280 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:11,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 14:44:11,495 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,SelfDestructingSolverStorable49 [2022-01-18 14:44:11,496 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:11,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:11,496 INFO L85 PathProgramCache]: Analyzing trace with hash 2133722595, now seen corresponding path program 46 times [2022-01-18 14:44:11,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:11,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565949283] [2022-01-18 14:44:11,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:11,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:11,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:11,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565949283] [2022-01-18 14:44:11,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565949283] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:11,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689501141] [2022-01-18 14:44:11,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:44:11,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:11,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:11,521 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) [2022-01-18 14:44:11,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 14:44:11,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:44:11,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:11,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:11,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:11,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:11,679 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:11,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689501141] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:11,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:11,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 6] total 11 [2022-01-18 14:44:11,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637292649] [2022-01-18 14:44:11,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:11,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:44:11,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:11,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:44:11,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:44:11,680 INFO L87 Difference]: Start difference. First operand 330 states and 708 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2022-01-18 14:44:12,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:12,268 INFO L93 Difference]: Finished difference Result 735 states and 1392 transitions. [2022-01-18 14:44:12,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 14:44:12,269 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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 25 [2022-01-18 14:44:12,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:12,271 INFO L225 Difference]: With dead ends: 735 [2022-01-18 14:44:12,271 INFO L226 Difference]: Without dead ends: 735 [2022-01-18 14:44:12,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=389, Invalid=1867, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 14:44:12,271 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 126 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:12,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 226 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:44:12,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-01-18 14:44:12,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 331. [2022-01-18 14:44:12,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.1515151515151514) internal successors, (710), 330 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:12,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 710 transitions. [2022-01-18 14:44:12,301 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 710 transitions. Word has length 25 [2022-01-18 14:44:12,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:12,301 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 710 transitions. [2022-01-18 14:44:12,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2022-01-18 14:44:12,302 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 710 transitions. [2022-01-18 14:44:12,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:12,302 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:12,302 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:12,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 14:44:12,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:12,507 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:12,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:12,508 INFO L85 PathProgramCache]: Analyzing trace with hash 749824513, now seen corresponding path program 47 times [2022-01-18 14:44:12,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:12,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385171359] [2022-01-18 14:44:12,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:12,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:12,531 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:12,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:12,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385171359] [2022-01-18 14:44:12,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385171359] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:12,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132472137] [2022-01-18 14:44:12,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:44:12,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:12,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:12,532 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) [2022-01-18 14:44:12,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 14:44:12,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 14:44:12,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:12,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:12,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:12,647 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:12,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:12,687 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:12,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132472137] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:12,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:12,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 6] total 11 [2022-01-18 14:44:12,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40913226] [2022-01-18 14:44:12,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:12,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:44:12,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:12,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:44:12,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:44:12,688 INFO L87 Difference]: Start difference. First operand 331 states and 710 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2022-01-18 14:44:13,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:13,039 INFO L93 Difference]: Finished difference Result 510 states and 997 transitions. [2022-01-18 14:44:13,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 14:44:13,039 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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 25 [2022-01-18 14:44:13,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:13,041 INFO L225 Difference]: With dead ends: 510 [2022-01-18 14:44:13,041 INFO L226 Difference]: Without dead ends: 506 [2022-01-18 14:44:13,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:44:13,041 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 115 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:13,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 140 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:44:13,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-01-18 14:44:13,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 331. [2022-01-18 14:44:13,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.1484848484848484) internal successors, (709), 330 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:13,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 709 transitions. [2022-01-18 14:44:13,046 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 709 transitions. Word has length 25 [2022-01-18 14:44:13,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:13,046 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 709 transitions. [2022-01-18 14:44:13,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2022-01-18 14:44:13,046 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 709 transitions. [2022-01-18 14:44:13,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:13,046 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:13,046 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:13,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 14:44:13,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:13,262 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:13,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:13,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1067153113, now seen corresponding path program 48 times [2022-01-18 14:44:13,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:13,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267300223] [2022-01-18 14:44:13,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:13,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:13,289 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:13,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:13,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267300223] [2022-01-18 14:44:13,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267300223] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:13,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480794959] [2022-01-18 14:44:13,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:44:13,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:13,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:13,290 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) [2022-01-18 14:44:13,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 14:44:13,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 14:44:13,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:13,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:13,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:13,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:13,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480794959] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:13,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:13,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 12 [2022-01-18 14:44:13,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297362128] [2022-01-18 14:44:13,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:13,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:44:13,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:13,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:44:13,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:44:13,438 INFO L87 Difference]: Start difference. First operand 331 states and 709 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2022-01-18 14:44:14,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:14,183 INFO L93 Difference]: Finished difference Result 687 states and 1294 transitions. [2022-01-18 14:44:14,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 14:44:14,183 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 25 [2022-01-18 14:44:14,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:14,185 INFO L225 Difference]: With dead ends: 687 [2022-01-18 14:44:14,185 INFO L226 Difference]: Without dead ends: 687 [2022-01-18 14:44:14,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=2582, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 14:44:14,186 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 181 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:14,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 233 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:44:14,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-01-18 14:44:14,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 319. [2022-01-18 14:44:14,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.1226415094339623) internal successors, (675), 318 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:14,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 675 transitions. [2022-01-18 14:44:14,193 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 675 transitions. Word has length 25 [2022-01-18 14:44:14,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:14,193 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 675 transitions. [2022-01-18 14:44:14,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2022-01-18 14:44:14,193 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 675 transitions. [2022-01-18 14:44:14,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:14,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:14,193 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:14,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 14:44:14,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:14,409 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:14,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:14,409 INFO L85 PathProgramCache]: Analyzing trace with hash 243478247, now seen corresponding path program 49 times [2022-01-18 14:44:14,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:14,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890932618] [2022-01-18 14:44:14,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:14,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:14,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:14,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890932618] [2022-01-18 14:44:14,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890932618] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:14,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326545928] [2022-01-18 14:44:14,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:44:14,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:14,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:14,438 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) [2022-01-18 14:44:14,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 14:44:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:14,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:14,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:14,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:14,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326545928] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:14,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:14,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 12 [2022-01-18 14:44:14,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691430923] [2022-01-18 14:44:14,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:14,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:44:14,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:14,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:44:14,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:44:14,603 INFO L87 Difference]: Start difference. First operand 319 states and 675 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2022-01-18 14:44:15,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:15,010 INFO L93 Difference]: Finished difference Result 476 states and 923 transitions. [2022-01-18 14:44:15,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 14:44:15,010 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 25 [2022-01-18 14:44:15,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:15,012 INFO L225 Difference]: With dead ends: 476 [2022-01-18 14:44:15,012 INFO L226 Difference]: Without dead ends: 470 [2022-01-18 14:44:15,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 14:44:15,012 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 113 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:15,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 195 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:44:15,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-01-18 14:44:15,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 319. [2022-01-18 14:44:15,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.1163522012578615) internal successors, (673), 318 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:15,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 673 transitions. [2022-01-18 14:44:15,016 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 673 transitions. Word has length 25 [2022-01-18 14:44:15,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:15,016 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 673 transitions. [2022-01-18 14:44:15,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2022-01-18 14:44:15,016 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 673 transitions. [2022-01-18 14:44:15,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:15,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:15,017 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:15,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 14:44:15,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-01-18 14:44:15,222 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:15,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:15,222 INFO L85 PathProgramCache]: Analyzing trace with hash -868255717, now seen corresponding path program 50 times [2022-01-18 14:44:15,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:15,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808685144] [2022-01-18 14:44:15,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:15,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:15,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:15,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808685144] [2022-01-18 14:44:15,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808685144] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:15,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869539108] [2022-01-18 14:44:15,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:44:15,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:15,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:15,248 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) [2022-01-18 14:44:15,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 14:44:15,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:44:15,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:15,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:15,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:15,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:15,408 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:15,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869539108] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:15,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:15,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 6] total 12 [2022-01-18 14:44:15,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269538909] [2022-01-18 14:44:15,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:15,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:44:15,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:15,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:44:15,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:44:15,409 INFO L87 Difference]: Start difference. First operand 319 states and 673 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:16,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:16,054 INFO L93 Difference]: Finished difference Result 866 states and 1642 transitions. [2022-01-18 14:44:16,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 14:44:16,055 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 14:44:16,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:16,057 INFO L225 Difference]: With dead ends: 866 [2022-01-18 14:44:16,057 INFO L226 Difference]: Without dead ends: 866 [2022-01-18 14:44:16,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=417, Invalid=1745, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 14:44:16,057 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 152 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:16,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 278 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:44:16,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2022-01-18 14:44:16,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 320. [2022-01-18 14:44:16,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.115987460815047) internal successors, (675), 319 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:16,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 675 transitions. [2022-01-18 14:44:16,063 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 675 transitions. Word has length 25 [2022-01-18 14:44:16,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:16,063 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 675 transitions. [2022-01-18 14:44:16,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:16,063 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 675 transitions. [2022-01-18 14:44:16,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:16,063 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:16,063 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:16,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 14:44:16,275 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,SelfDestructingSolverStorable54 [2022-01-18 14:44:16,275 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:16,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:16,276 INFO L85 PathProgramCache]: Analyzing trace with hash -165450409, now seen corresponding path program 51 times [2022-01-18 14:44:16,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:16,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389576354] [2022-01-18 14:44:16,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:16,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:16,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:16,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389576354] [2022-01-18 14:44:16,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389576354] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:16,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852973663] [2022-01-18 14:44:16,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:44:16,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:16,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:16,299 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) [2022-01-18 14:44:16,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 14:44:16,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 14:44:16,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:16,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:16,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:16,428 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:16,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:16,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852973663] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:16,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:16,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 6] total 12 [2022-01-18 14:44:16,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176267586] [2022-01-18 14:44:16,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:16,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:44:16,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:16,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:44:16,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:44:16,470 INFO L87 Difference]: Start difference. First operand 320 states and 675 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:16,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:16,907 INFO L93 Difference]: Finished difference Result 575 states and 1076 transitions. [2022-01-18 14:44:16,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 14:44:16,907 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 14:44:16,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:16,909 INFO L225 Difference]: With dead ends: 575 [2022-01-18 14:44:16,909 INFO L226 Difference]: Without dead ends: 569 [2022-01-18 14:44:16,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=961, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 14:44:16,909 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 123 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:16,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 159 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:44:16,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-01-18 14:44:16,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 320. [2022-01-18 14:44:16,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.1128526645768027) internal successors, (674), 319 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:16,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 674 transitions. [2022-01-18 14:44:16,914 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 674 transitions. Word has length 25 [2022-01-18 14:44:16,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:16,914 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 674 transitions. [2022-01-18 14:44:16,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:16,914 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 674 transitions. [2022-01-18 14:44:16,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:16,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:16,915 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:16,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-18 14:44:17,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-18 14:44:17,118 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:17,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:17,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1430378269, now seen corresponding path program 52 times [2022-01-18 14:44:17,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:17,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739472996] [2022-01-18 14:44:17,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:17,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:17,143 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:17,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:17,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739472996] [2022-01-18 14:44:17,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739472996] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:17,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428887277] [2022-01-18 14:44:17,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:44:17,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:17,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:17,144 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) [2022-01-18 14:44:17,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 14:44:17,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:44:17,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:17,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:17,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:17,260 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:17,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:17,304 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:17,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428887277] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:17,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:17,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 6] total 12 [2022-01-18 14:44:17,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840315412] [2022-01-18 14:44:17,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:17,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:44:17,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:17,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:44:17,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:44:17,305 INFO L87 Difference]: Start difference. First operand 320 states and 674 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2022-01-18 14:44:18,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:18,059 INFO L93 Difference]: Finished difference Result 737 states and 1379 transitions. [2022-01-18 14:44:18,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 14:44:18,060 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 25 [2022-01-18 14:44:18,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:18,062 INFO L225 Difference]: With dead ends: 737 [2022-01-18 14:44:18,062 INFO L226 Difference]: Without dead ends: 737 [2022-01-18 14:44:18,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=412, Invalid=1658, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 14:44:18,062 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 152 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:18,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 261 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:44:18,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-01-18 14:44:18,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 321. [2022-01-18 14:44:18,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.1125) internal successors, (676), 320 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:18,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 676 transitions. [2022-01-18 14:44:18,068 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 676 transitions. Word has length 25 [2022-01-18 14:44:18,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:18,068 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 676 transitions. [2022-01-18 14:44:18,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2022-01-18 14:44:18,068 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 676 transitions. [2022-01-18 14:44:18,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:18,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:18,068 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:18,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 14:44:18,269 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,SelfDestructingSolverStorable56 [2022-01-18 14:44:18,269 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:18,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:18,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1480690945, now seen corresponding path program 53 times [2022-01-18 14:44:18,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:18,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146332335] [2022-01-18 14:44:18,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:18,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:18,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:18,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:18,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146332335] [2022-01-18 14:44:18,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146332335] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:18,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765962982] [2022-01-18 14:44:18,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:44:18,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:18,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:18,295 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) [2022-01-18 14:44:18,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 14:44:18,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 14:44:18,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:18,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:18,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:18,416 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:18,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:18,457 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:18,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765962982] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:18,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:18,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 6] total 12 [2022-01-18 14:44:18,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945093425] [2022-01-18 14:44:18,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:18,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:44:18,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:18,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:44:18,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:44:18,458 INFO L87 Difference]: Start difference. First operand 321 states and 676 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2022-01-18 14:44:18,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:18,913 INFO L93 Difference]: Finished difference Result 645 states and 1234 transitions. [2022-01-18 14:44:18,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 14:44:18,914 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 25 [2022-01-18 14:44:18,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:18,916 INFO L225 Difference]: With dead ends: 645 [2022-01-18 14:44:18,916 INFO L226 Difference]: Without dead ends: 641 [2022-01-18 14:44:18,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 14:44:18,916 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 159 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:18,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 165 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:44:18,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-01-18 14:44:18,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 323. [2022-01-18 14:44:18,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.1055900621118013) internal successors, (678), 322 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:18,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 678 transitions. [2022-01-18 14:44:18,921 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 678 transitions. Word has length 25 [2022-01-18 14:44:18,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:18,921 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 678 transitions. [2022-01-18 14:44:18,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2022-01-18 14:44:18,921 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 678 transitions. [2022-01-18 14:44:18,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:18,921 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:18,922 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:18,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-18 14:44:19,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-01-18 14:44:19,131 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:19,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:19,132 INFO L85 PathProgramCache]: Analyzing trace with hash -336286681, now seen corresponding path program 54 times [2022-01-18 14:44:19,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:19,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086439728] [2022-01-18 14:44:19,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:19,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:19,165 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:19,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:19,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086439728] [2022-01-18 14:44:19,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086439728] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:19,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130288467] [2022-01-18 14:44:19,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:44:19,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:19,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:19,166 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) [2022-01-18 14:44:19,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 14:44:19,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 14:44:19,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:19,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:19,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:19,297 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:19,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:19,337 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:19,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130288467] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:19,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:19,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 13 [2022-01-18 14:44:19,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29880935] [2022-01-18 14:44:19,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:19,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:44:19,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:19,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:44:19,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:44:19,338 INFO L87 Difference]: Start difference. First operand 323 states and 678 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 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) [2022-01-18 14:44:20,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:20,578 INFO L93 Difference]: Finished difference Result 881 states and 1678 transitions. [2022-01-18 14:44:20,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 14:44:20,579 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 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 25 [2022-01-18 14:44:20,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:20,581 INFO L225 Difference]: With dead ends: 881 [2022-01-18 14:44:20,581 INFO L226 Difference]: Without dead ends: 881 [2022-01-18 14:44:20,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1028, Invalid=4824, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 14:44:20,582 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 232 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:20,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 218 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:44:20,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-01-18 14:44:20,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 325. [2022-01-18 14:44:20,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.1049382716049383) internal successors, (682), 324 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:20,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 682 transitions. [2022-01-18 14:44:20,588 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 682 transitions. Word has length 25 [2022-01-18 14:44:20,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:20,588 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 682 transitions. [2022-01-18 14:44:20,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 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) [2022-01-18 14:44:20,588 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 682 transitions. [2022-01-18 14:44:20,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:20,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:20,588 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:20,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-01-18 14:44:20,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-18 14:44:20,789 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:20,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:20,789 INFO L85 PathProgramCache]: Analyzing trace with hash 974344679, now seen corresponding path program 55 times [2022-01-18 14:44:20,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:20,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924705023] [2022-01-18 14:44:20,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:20,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:20,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:20,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924705023] [2022-01-18 14:44:20,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924705023] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:20,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974493953] [2022-01-18 14:44:20,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:44:20,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:20,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:20,821 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) [2022-01-18 14:44:20,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 14:44:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:20,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:20,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:20,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:20,988 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:20,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974493953] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:20,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:20,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 13 [2022-01-18 14:44:20,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722382878] [2022-01-18 14:44:20,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:20,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:44:20,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:20,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:44:20,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:44:20,989 INFO L87 Difference]: Start difference. First operand 325 states and 682 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 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) [2022-01-18 14:44:21,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:21,506 INFO L93 Difference]: Finished difference Result 590 states and 1117 transitions. [2022-01-18 14:44:21,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 14:44:21,506 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 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 25 [2022-01-18 14:44:21,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:21,508 INFO L225 Difference]: With dead ends: 590 [2022-01-18 14:44:21,508 INFO L226 Difference]: Without dead ends: 570 [2022-01-18 14:44:21,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 14:44:21,508 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 135 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:21,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 229 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:44:21,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-01-18 14:44:21,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 327. [2022-01-18 14:44:21,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.0950920245398774) internal successors, (683), 326 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:21,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 683 transitions. [2022-01-18 14:44:21,513 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 683 transitions. Word has length 25 [2022-01-18 14:44:21,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:21,513 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 683 transitions. [2022-01-18 14:44:21,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 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) [2022-01-18 14:44:21,513 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 683 transitions. [2022-01-18 14:44:21,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:21,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:21,513 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:21,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-18 14:44:21,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:21,714 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:21,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:21,714 INFO L85 PathProgramCache]: Analyzing trace with hash -2067056413, now seen corresponding path program 56 times [2022-01-18 14:44:21,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:21,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178033257] [2022-01-18 14:44:21,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:21,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:21,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:21,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178033257] [2022-01-18 14:44:21,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178033257] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:21,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073611513] [2022-01-18 14:44:21,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:44:21,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:21,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:21,755 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) [2022-01-18 14:44:21,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 14:44:21,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:44:21,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:21,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:21,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:21,901 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:21,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:21,943 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:21,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073611513] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:21,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:21,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 14 [2022-01-18 14:44:21,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872924491] [2022-01-18 14:44:21,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:21,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:44:21,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:21,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:44:21,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:44:21,944 INFO L87 Difference]: Start difference. First operand 327 states and 683 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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) [2022-01-18 14:44:23,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:23,400 INFO L93 Difference]: Finished difference Result 693 states and 1321 transitions. [2022-01-18 14:44:23,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 14:44:23,401 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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 25 [2022-01-18 14:44:23,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:23,402 INFO L225 Difference]: With dead ends: 693 [2022-01-18 14:44:23,402 INFO L226 Difference]: Without dead ends: 691 [2022-01-18 14:44:23,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=971, Invalid=4141, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 14:44:23,403 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 182 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:23,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 182 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:44:23,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-01-18 14:44:23,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 307. [2022-01-18 14:44:23,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.0718954248366015) internal successors, (634), 306 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:23,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 634 transitions. [2022-01-18 14:44:23,420 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 634 transitions. Word has length 25 [2022-01-18 14:44:23,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:23,420 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 634 transitions. [2022-01-18 14:44:23,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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) [2022-01-18 14:44:23,420 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 634 transitions. [2022-01-18 14:44:23,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:23,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:23,421 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:23,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 14:44:23,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:23,631 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:23,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:23,631 INFO L85 PathProgramCache]: Analyzing trace with hash 747123299, now seen corresponding path program 57 times [2022-01-18 14:44:23,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:23,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820846712] [2022-01-18 14:44:23,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:23,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:23,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:23,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820846712] [2022-01-18 14:44:23,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820846712] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:23,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212335595] [2022-01-18 14:44:23,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:44:23,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:23,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:23,667 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) [2022-01-18 14:44:23,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 14:44:23,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-18 14:44:23,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:23,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:23,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:23,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:23,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212335595] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:23,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:23,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 14 [2022-01-18 14:44:23,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177506690] [2022-01-18 14:44:23,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:23,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:44:23,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:23,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:44:23,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:44:23,836 INFO L87 Difference]: Start difference. First operand 307 states and 634 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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) [2022-01-18 14:44:24,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:24,217 INFO L93 Difference]: Finished difference Result 466 states and 889 transitions. [2022-01-18 14:44:24,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 14:44:24,218 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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 25 [2022-01-18 14:44:24,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:24,219 INFO L225 Difference]: With dead ends: 466 [2022-01-18 14:44:24,219 INFO L226 Difference]: Without dead ends: 456 [2022-01-18 14:44:24,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=1099, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 14:44:24,219 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 140 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:24,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 162 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:44:24,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-01-18 14:44:24,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 307. [2022-01-18 14:44:24,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.065359477124183) internal successors, (632), 306 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:24,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 632 transitions. [2022-01-18 14:44:24,223 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 632 transitions. Word has length 25 [2022-01-18 14:44:24,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:24,223 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 632 transitions. [2022-01-18 14:44:24,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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) [2022-01-18 14:44:24,223 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 632 transitions. [2022-01-18 14:44:24,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:24,224 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:24,224 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:24,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-01-18 14:44:24,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:24,424 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:24,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:24,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1653381349, now seen corresponding path program 58 times [2022-01-18 14:44:24,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:24,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591444446] [2022-01-18 14:44:24,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:24,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:24,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:24,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591444446] [2022-01-18 14:44:24,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591444446] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:24,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135748250] [2022-01-18 14:44:24,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:44:24,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:24,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:24,463 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) [2022-01-18 14:44:24,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 14:44:24,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:44:24,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:24,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:24,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:24,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:24,645 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:24,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135748250] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:24,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:24,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 14 [2022-01-18 14:44:24,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327421725] [2022-01-18 14:44:24,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:24,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:44:24,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:24,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:44:24,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:44:24,645 INFO L87 Difference]: Start difference. First operand 307 states and 632 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:25,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:25,941 INFO L93 Difference]: Finished difference Result 624 states and 1226 transitions. [2022-01-18 14:44:25,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 14:44:25,941 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 14:44:25,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:25,943 INFO L225 Difference]: With dead ends: 624 [2022-01-18 14:44:25,943 INFO L226 Difference]: Without dead ends: 624 [2022-01-18 14:44:25,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=920, Invalid=3910, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 14:44:25,944 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 181 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:25,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 79 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:44:25,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-01-18 14:44:25,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 282. [2022-01-18 14:44:25,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.03914590747331) internal successors, (573), 281 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:25,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 573 transitions. [2022-01-18 14:44:25,948 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 573 transitions. Word has length 25 [2022-01-18 14:44:25,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:25,948 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 573 transitions. [2022-01-18 14:44:25,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:25,948 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 573 transitions. [2022-01-18 14:44:25,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:25,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:25,948 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:25,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-01-18 14:44:26,163 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,SelfDestructingSolverStorable62 [2022-01-18 14:44:26,164 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:26,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:26,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1650303401, now seen corresponding path program 59 times [2022-01-18 14:44:26,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:26,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366032447] [2022-01-18 14:44:26,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:26,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:26,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:26,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366032447] [2022-01-18 14:44:26,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366032447] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:26,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366762744] [2022-01-18 14:44:26,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:44:26,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:26,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:26,199 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) [2022-01-18 14:44:26,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 14:44:26,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:44:26,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:26,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:26,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:26,323 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:26,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:26,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366762744] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:26,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:26,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 14 [2022-01-18 14:44:26,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313889283] [2022-01-18 14:44:26,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:26,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:44:26,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:26,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:44:26,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:44:26,366 INFO L87 Difference]: Start difference. First operand 282 states and 573 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:26,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:26,808 INFO L93 Difference]: Finished difference Result 399 states and 733 transitions. [2022-01-18 14:44:26,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 14:44:26,808 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 14:44:26,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:26,809 INFO L225 Difference]: With dead ends: 399 [2022-01-18 14:44:26,809 INFO L226 Difference]: Without dead ends: 369 [2022-01-18 14:44:26,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 14:44:26,810 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 178 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:26,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 150 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:44:26,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-01-18 14:44:26,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 261. [2022-01-18 14:44:26,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.042307692307692) internal successors, (531), 260 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:26,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 531 transitions. [2022-01-18 14:44:26,813 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 531 transitions. Word has length 25 [2022-01-18 14:44:26,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:26,813 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 531 transitions. [2022-01-18 14:44:26,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:26,813 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 531 transitions. [2022-01-18 14:44:26,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:26,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:26,814 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:26,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-01-18 14:44:27,023 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,SelfDestructingSolverStorable63 [2022-01-18 14:44:27,023 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:27,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:27,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1820860133, now seen corresponding path program 60 times [2022-01-18 14:44:27,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:27,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379453727] [2022-01-18 14:44:27,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:27,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:27,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:27,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:27,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379453727] [2022-01-18 14:44:27,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379453727] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:27,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472198256] [2022-01-18 14:44:27,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:44:27,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:27,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:27,051 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) [2022-01-18 14:44:27,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 14:44:27,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 14:44:27,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:27,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:27,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:27,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:27,205 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:27,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472198256] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:27,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:27,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 12 [2022-01-18 14:44:27,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262355263] [2022-01-18 14:44:27,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:27,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:44:27,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:27,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:44:27,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:44:27,207 INFO L87 Difference]: Start difference. First operand 261 states and 531 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:27,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:27,914 INFO L93 Difference]: Finished difference Result 539 states and 1026 transitions. [2022-01-18 14:44:27,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 14:44:27,914 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 14:44:27,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:27,915 INFO L225 Difference]: With dead ends: 539 [2022-01-18 14:44:27,915 INFO L226 Difference]: Without dead ends: 539 [2022-01-18 14:44:27,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=483, Invalid=2487, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 14:44:27,916 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 156 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:27,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 90 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:44:27,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-01-18 14:44:27,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 255. [2022-01-18 14:44:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.0196850393700787) internal successors, (513), 254 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:27,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 513 transitions. [2022-01-18 14:44:27,920 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 513 transitions. Word has length 25 [2022-01-18 14:44:27,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:27,920 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 513 transitions. [2022-01-18 14:44:27,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:27,920 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 513 transitions. [2022-01-18 14:44:27,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:27,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:27,920 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:27,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-01-18 14:44:28,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:28,131 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:28,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:28,132 INFO L85 PathProgramCache]: Analyzing trace with hash -734824617, now seen corresponding path program 61 times [2022-01-18 14:44:28,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:28,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139840569] [2022-01-18 14:44:28,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:28,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:28,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:28,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139840569] [2022-01-18 14:44:28,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139840569] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:28,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600702590] [2022-01-18 14:44:28,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:44:28,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:28,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:28,167 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) [2022-01-18 14:44:28,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 14:44:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:28,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:28,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:28,282 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:28,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:28,324 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:28,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600702590] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:28,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:28,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 12 [2022-01-18 14:44:28,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079239618] [2022-01-18 14:44:28,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:28,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:44:28,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:28,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:44:28,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:44:28,325 INFO L87 Difference]: Start difference. First operand 255 states and 513 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2022-01-18 14:44:28,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:28,734 INFO L93 Difference]: Finished difference Result 355 states and 645 transitions. [2022-01-18 14:44:28,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 14:44:28,735 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 25 [2022-01-18 14:44:28,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:28,735 INFO L225 Difference]: With dead ends: 355 [2022-01-18 14:44:28,735 INFO L226 Difference]: Without dead ends: 346 [2022-01-18 14:44:28,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=1032, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 14:44:28,739 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 104 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:28,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 152 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:44:28,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-01-18 14:44:28,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 240. [2022-01-18 14:44:28,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.0209205020920504) internal successors, (483), 239 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:28,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 483 transitions. [2022-01-18 14:44:28,742 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 483 transitions. Word has length 25 [2022-01-18 14:44:28,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:28,742 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 483 transitions. [2022-01-18 14:44:28,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2022-01-18 14:44:28,742 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 483 transitions. [2022-01-18 14:44:28,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:28,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:28,743 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:28,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-18 14:44:28,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:28,943 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:28,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:28,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1414716187, now seen corresponding path program 62 times [2022-01-18 14:44:28,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:28,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942176316] [2022-01-18 14:44:28,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:28,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:28,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:28,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942176316] [2022-01-18 14:44:28,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942176316] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:28,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180637296] [2022-01-18 14:44:28,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:44:28,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:28,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:28,969 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) [2022-01-18 14:44:28,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 14:44:28,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:44:28,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:28,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:28,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:29,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:29,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180637296] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:29,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:29,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 6] total 10 [2022-01-18 14:44:29,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494810047] [2022-01-18 14:44:29,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:29,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:44:29,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:29,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:44:29,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:44:29,132 INFO L87 Difference]: Start difference. First operand 240 states and 483 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2022-01-18 14:44:29,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:29,527 INFO L93 Difference]: Finished difference Result 465 states and 867 transitions. [2022-01-18 14:44:29,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 14:44:29,527 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 25 [2022-01-18 14:44:29,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:29,528 INFO L225 Difference]: With dead ends: 465 [2022-01-18 14:44:29,528 INFO L226 Difference]: Without dead ends: 465 [2022-01-18 14:44:29,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=310, Invalid=1412, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 14:44:29,529 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 120 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:29,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 121 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:44:29,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-01-18 14:44:29,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 240. [2022-01-18 14:44:29,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.01673640167364) internal successors, (482), 239 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:29,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 482 transitions. [2022-01-18 14:44:29,532 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 482 transitions. Word has length 25 [2022-01-18 14:44:29,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:29,532 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 482 transitions. [2022-01-18 14:44:29,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2022-01-18 14:44:29,532 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 482 transitions. [2022-01-18 14:44:29,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:29,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:29,533 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:29,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-01-18 14:44:29,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-01-18 14:44:29,733 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:29,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:29,733 INFO L85 PathProgramCache]: Analyzing trace with hash 2117521495, now seen corresponding path program 63 times [2022-01-18 14:44:29,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:29,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417875051] [2022-01-18 14:44:29,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:29,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:29,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:29,757 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:29,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:29,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417875051] [2022-01-18 14:44:29,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417875051] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:29,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771953399] [2022-01-18 14:44:29,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:44:29,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:29,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:29,758 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) [2022-01-18 14:44:29,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 14:44:29,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:44:29,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:29,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:29,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:29,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:29,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771953399] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:29,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:29,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 6] total 10 [2022-01-18 14:44:29,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582213185] [2022-01-18 14:44:29,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:29,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:44:29,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:29,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:44:29,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:44:29,898 INFO L87 Difference]: Start difference. First operand 240 states and 482 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2022-01-18 14:44:30,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:30,133 INFO L93 Difference]: Finished difference Result 313 states and 582 transitions. [2022-01-18 14:44:30,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 14:44:30,134 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 25 [2022-01-18 14:44:30,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:30,134 INFO L225 Difference]: With dead ends: 313 [2022-01-18 14:44:30,134 INFO L226 Difference]: Without dead ends: 310 [2022-01-18 14:44:30,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:44:30,135 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 74 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:30,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 90 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:44:30,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-01-18 14:44:30,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 237. [2022-01-18 14:44:30,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.016949152542373) internal successors, (476), 236 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:30,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 476 transitions. [2022-01-18 14:44:30,137 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 476 transitions. Word has length 25 [2022-01-18 14:44:30,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:30,137 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 476 transitions. [2022-01-18 14:44:30,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2022-01-18 14:44:30,138 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 476 transitions. [2022-01-18 14:44:30,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:30,138 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:30,138 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:30,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 14:44:30,347 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,SelfDestructingSolverStorable67 [2022-01-18 14:44:30,347 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:30,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:30,348 INFO L85 PathProgramCache]: Analyzing trace with hash 852593635, now seen corresponding path program 64 times [2022-01-18 14:44:30,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:30,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644776269] [2022-01-18 14:44:30,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:30,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:30,375 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:30,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:30,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644776269] [2022-01-18 14:44:30,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644776269] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:30,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406901530] [2022-01-18 14:44:30,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:44:30,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:30,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:30,377 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) [2022-01-18 14:44:30,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 14:44:30,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:44:30,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:30,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:30,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:30,469 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:30,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:30,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406901530] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:30,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:30,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 6] total 10 [2022-01-18 14:44:30,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254667043] [2022-01-18 14:44:30,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:30,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:44:30,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:30,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:44:30,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:44:30,513 INFO L87 Difference]: Start difference. First operand 237 states and 476 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2022-01-18 14:44:30,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:30,928 INFO L93 Difference]: Finished difference Result 364 states and 685 transitions. [2022-01-18 14:44:30,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 14:44:30,928 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 25 [2022-01-18 14:44:30,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:30,929 INFO L225 Difference]: With dead ends: 364 [2022-01-18 14:44:30,929 INFO L226 Difference]: Without dead ends: 364 [2022-01-18 14:44:30,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=288, Invalid=902, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 14:44:30,929 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 87 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:30,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 132 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:44:30,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-01-18 14:44:30,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 238. [2022-01-18 14:44:30,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.0168776371308015) internal successors, (478), 237 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:30,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 478 transitions. [2022-01-18 14:44:30,932 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 478 transitions. Word has length 25 [2022-01-18 14:44:30,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:30,932 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 478 transitions. [2022-01-18 14:44:30,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2022-01-18 14:44:30,932 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 478 transitions. [2022-01-18 14:44:30,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:30,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:30,933 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:30,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-01-18 14:44:31,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:31,142 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:31,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:31,143 INFO L85 PathProgramCache]: Analyzing trace with hash -531304447, now seen corresponding path program 65 times [2022-01-18 14:44:31,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:31,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628498465] [2022-01-18 14:44:31,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:31,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:31,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:31,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:31,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628498465] [2022-01-18 14:44:31,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628498465] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:31,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041239939] [2022-01-18 14:44:31,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:44:31,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:31,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:31,166 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) [2022-01-18 14:44:31,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 14:44:31,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 14:44:31,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:31,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:31,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:31,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:31,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041239939] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:31,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:31,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 6] total 10 [2022-01-18 14:44:31,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643141081] [2022-01-18 14:44:31,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:31,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:44:31,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:31,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:44:31,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:44:31,306 INFO L87 Difference]: Start difference. First operand 238 states and 478 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2022-01-18 14:44:31,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:31,645 INFO L93 Difference]: Finished difference Result 393 states and 731 transitions. [2022-01-18 14:44:31,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 14:44:31,645 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 25 [2022-01-18 14:44:31,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:31,645 INFO L225 Difference]: With dead ends: 393 [2022-01-18 14:44:31,646 INFO L226 Difference]: Without dead ends: 391 [2022-01-18 14:44:31,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 14:44:31,646 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:31,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 112 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:44:31,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-01-18 14:44:31,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 238. [2022-01-18 14:44:31,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.0126582278481013) internal successors, (477), 237 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:31,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 477 transitions. [2022-01-18 14:44:31,649 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 477 transitions. Word has length 25 [2022-01-18 14:44:31,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:31,649 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 477 transitions. [2022-01-18 14:44:31,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2022-01-18 14:44:31,649 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 477 transitions. [2022-01-18 14:44:31,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:31,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:31,650 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:31,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-01-18 14:44:31,850 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,SelfDestructingSolverStorable69 [2022-01-18 14:44:31,850 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:31,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:31,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1946685223, now seen corresponding path program 66 times [2022-01-18 14:44:31,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:31,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679230245] [2022-01-18 14:44:31,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:31,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:31,878 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:31,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:31,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679230245] [2022-01-18 14:44:31,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679230245] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:31,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624766644] [2022-01-18 14:44:31,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:44:31,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:31,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:31,880 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) [2022-01-18 14:44:31,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 14:44:31,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 14:44:31,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:31,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:31,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:31,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:32,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624766644] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:32,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:32,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 11 [2022-01-18 14:44:32,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254047045] [2022-01-18 14:44:32,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:32,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:44:32,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:32,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:44:32,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:44:32,031 INFO L87 Difference]: Start difference. First operand 238 states and 477 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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) [2022-01-18 14:44:33,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:33,049 INFO L93 Difference]: Finished difference Result 525 states and 998 transitions. [2022-01-18 14:44:33,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 14:44:33,049 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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 25 [2022-01-18 14:44:33,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:33,050 INFO L225 Difference]: With dead ends: 525 [2022-01-18 14:44:33,050 INFO L226 Difference]: Without dead ends: 525 [2022-01-18 14:44:33,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2001 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1070, Invalid=4936, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 14:44:33,051 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 150 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:33,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 154 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:44:33,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-01-18 14:44:33,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 240. [2022-01-18 14:44:33,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.01255230125523) internal successors, (481), 239 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:33,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 481 transitions. [2022-01-18 14:44:33,055 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 481 transitions. Word has length 25 [2022-01-18 14:44:33,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:33,055 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 481 transitions. [2022-01-18 14:44:33,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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) [2022-01-18 14:44:33,055 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 481 transitions. [2022-01-18 14:44:33,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:33,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:33,055 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:33,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-01-18 14:44:33,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:33,256 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:33,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:33,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1037650713, now seen corresponding path program 67 times [2022-01-18 14:44:33,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:33,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032870567] [2022-01-18 14:44:33,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:33,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:33,285 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:33,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:33,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032870567] [2022-01-18 14:44:33,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032870567] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:33,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042806582] [2022-01-18 14:44:33,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:44:33,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:33,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:33,286 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) [2022-01-18 14:44:33,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 14:44:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:33,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:33,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:33,378 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:33,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:33,423 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:33,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042806582] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:33,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:33,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 11 [2022-01-18 14:44:33,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801873511] [2022-01-18 14:44:33,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:33,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:44:33,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:33,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:44:33,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:44:33,424 INFO L87 Difference]: Start difference. First operand 240 states and 481 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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) [2022-01-18 14:44:33,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:33,825 INFO L93 Difference]: Finished difference Result 465 states and 847 transitions. [2022-01-18 14:44:33,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 14:44:33,825 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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 25 [2022-01-18 14:44:33,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:33,826 INFO L225 Difference]: With dead ends: 465 [2022-01-18 14:44:33,826 INFO L226 Difference]: Without dead ends: 445 [2022-01-18 14:44:33,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=305, Invalid=1335, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 14:44:33,826 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 129 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:33,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 169 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:44:33,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-01-18 14:44:33,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 242. [2022-01-18 14:44:33,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.0) internal successors, (482), 241 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:33,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 482 transitions. [2022-01-18 14:44:33,829 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 482 transitions. Word has length 25 [2022-01-18 14:44:33,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:33,830 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 482 transitions. [2022-01-18 14:44:33,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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) [2022-01-18 14:44:33,830 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 482 transitions. [2022-01-18 14:44:33,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:33,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:33,830 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:33,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-18 14:44:34,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:34,030 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:34,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:34,031 INFO L85 PathProgramCache]: Analyzing trace with hash 215915491, now seen corresponding path program 68 times [2022-01-18 14:44:34,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:34,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497990594] [2022-01-18 14:44:34,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:34,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:34,068 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:34,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:34,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497990594] [2022-01-18 14:44:34,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497990594] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:34,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187261852] [2022-01-18 14:44:34,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:44:34,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:34,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:34,069 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) [2022-01-18 14:44:34,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 14:44:34,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:44:34,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:34,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:34,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:34,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:34,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187261852] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:34,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:34,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 12 [2022-01-18 14:44:34,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825832409] [2022-01-18 14:44:34,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:34,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:44:34,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:34,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:44:34,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:44:34,213 INFO L87 Difference]: Start difference. First operand 242 states and 482 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 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) [2022-01-18 14:44:35,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:35,760 INFO L93 Difference]: Finished difference Result 539 states and 1042 transitions. [2022-01-18 14:44:35,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-18 14:44:35,760 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 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 25 [2022-01-18 14:44:35,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:35,761 INFO L225 Difference]: With dead ends: 539 [2022-01-18 14:44:35,761 INFO L226 Difference]: Without dead ends: 535 [2022-01-18 14:44:35,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3316 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1798, Invalid=7514, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 14:44:35,762 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 154 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:35,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 137 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:44:35,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-01-18 14:44:35,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 244. [2022-01-18 14:44:35,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.0) internal successors, (486), 243 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:35,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 486 transitions. [2022-01-18 14:44:35,765 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 486 transitions. Word has length 25 [2022-01-18 14:44:35,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:35,765 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 486 transitions. [2022-01-18 14:44:35,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 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) [2022-01-18 14:44:35,766 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 486 transitions. [2022-01-18 14:44:35,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:35,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:35,766 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:35,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-01-18 14:44:35,972 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,SelfDestructingSolverStorable72 [2022-01-18 14:44:35,973 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:35,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:35,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1264872093, now seen corresponding path program 69 times [2022-01-18 14:44:35,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:35,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485001545] [2022-01-18 14:44:35,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:35,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:36,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:36,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485001545] [2022-01-18 14:44:36,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485001545] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:36,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482302500] [2022-01-18 14:44:36,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:44:36,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:36,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:36,008 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) [2022-01-18 14:44:36,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 14:44:36,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 14:44:36,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:36,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:36,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:36,111 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:36,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:44:36,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482302500] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:36,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:36,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 12 [2022-01-18 14:44:36,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658568226] [2022-01-18 14:44:36,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:36,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:44:36,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:36,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:44:36,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:44:36,158 INFO L87 Difference]: Start difference. First operand 244 states and 486 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 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) [2022-01-18 14:44:36,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:36,673 INFO L93 Difference]: Finished difference Result 472 states and 847 transitions. [2022-01-18 14:44:36,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 14:44:36,674 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 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 25 [2022-01-18 14:44:36,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:36,674 INFO L225 Difference]: With dead ends: 472 [2022-01-18 14:44:36,674 INFO L226 Difference]: Without dead ends: 442 [2022-01-18 14:44:36,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=444, Invalid=1908, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 14:44:36,675 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 145 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:36,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 213 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:44:36,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-01-18 14:44:36,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 248. [2022-01-18 14:44:36,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.9838056680161944) internal successors, (490), 247 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:36,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 490 transitions. [2022-01-18 14:44:36,678 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 490 transitions. Word has length 25 [2022-01-18 14:44:36,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:36,678 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 490 transitions. [2022-01-18 14:44:36,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 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) [2022-01-18 14:44:36,678 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 490 transitions. [2022-01-18 14:44:36,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:36,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:36,679 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:36,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-01-18 14:44:36,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:36,888 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:36,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:36,888 INFO L85 PathProgramCache]: Analyzing trace with hash -901453409, now seen corresponding path program 70 times [2022-01-18 14:44:36,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:36,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91821537] [2022-01-18 14:44:36,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:36,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:36,925 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:36,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:36,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91821537] [2022-01-18 14:44:36,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91821537] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:36,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437591599] [2022-01-18 14:44:36,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:44:36,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:36,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:36,927 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) [2022-01-18 14:44:36,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 14:44:36,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:44:36,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:36,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:36,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:37,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:37,071 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:37,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437591599] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:37,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:37,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-01-18 14:44:37,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412118276] [2022-01-18 14:44:37,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:37,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:44:37,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:37,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:44:37,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:44:37,071 INFO L87 Difference]: Start difference. First operand 248 states and 490 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) [2022-01-18 14:44:38,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:38,258 INFO L93 Difference]: Finished difference Result 400 states and 777 transitions. [2022-01-18 14:44:38,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 14:44:38,258 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 25 [2022-01-18 14:44:38,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:38,259 INFO L225 Difference]: With dead ends: 400 [2022-01-18 14:44:38,259 INFO L226 Difference]: Without dead ends: 390 [2022-01-18 14:44:38,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 36 SyntacticMatches, 10 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1014, Invalid=3956, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 14:44:38,259 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 83 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:38,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 96 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:44:38,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-01-18 14:44:38,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 220. [2022-01-18 14:44:38,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.995433789954338) internal successors, (437), 219 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:38,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 437 transitions. [2022-01-18 14:44:38,262 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 437 transitions. Word has length 25 [2022-01-18 14:44:38,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:38,262 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 437 transitions. [2022-01-18 14:44:38,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) [2022-01-18 14:44:38,263 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 437 transitions. [2022-01-18 14:44:38,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:44:38,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:38,263 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:38,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-01-18 14:44:38,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:38,463 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:38,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:38,464 INFO L85 PathProgramCache]: Analyzing trace with hash -581286177, now seen corresponding path program 71 times [2022-01-18 14:44:38,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:38,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518847527] [2022-01-18 14:44:38,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:38,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:38,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:38,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:38,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518847527] [2022-01-18 14:44:38,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518847527] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:38,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859981748] [2022-01-18 14:44:38,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:44:38,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:38,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:38,501 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) [2022-01-18 14:44:38,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 14:44:38,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 14:44:38,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:38,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:44:38,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:38,589 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:38,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:38,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859981748] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:38,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:38,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-01-18 14:44:38,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693253042] [2022-01-18 14:44:38,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:38,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:44:38,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:38,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:44:38,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:44:38,637 INFO L87 Difference]: Start difference. First operand 220 states and 437 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) [2022-01-18 14:44:38,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:38,938 INFO L93 Difference]: Finished difference Result 318 states and 590 transitions. [2022-01-18 14:44:38,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 14:44:38,938 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 25 [2022-01-18 14:44:38,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:38,939 INFO L225 Difference]: With dead ends: 318 [2022-01-18 14:44:38,939 INFO L226 Difference]: Without dead ends: 304 [2022-01-18 14:44:38,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 14:44:38,939 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 136 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:38,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 137 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:44:38,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-01-18 14:44:38,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 220. [2022-01-18 14:44:38,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.9863013698630136) internal successors, (435), 219 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) [2022-01-18 14:44:38,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 435 transitions. [2022-01-18 14:44:38,942 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 435 transitions. Word has length 25 [2022-01-18 14:44:38,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:38,942 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 435 transitions. [2022-01-18 14:44:38,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) [2022-01-18 14:44:38,942 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 435 transitions. [2022-01-18 14:44:38,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:44:38,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:38,942 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:38,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-01-18 14:44:39,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:39,150 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:39,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:39,150 INFO L85 PathProgramCache]: Analyzing trace with hash -872757287, now seen corresponding path program 72 times [2022-01-18 14:44:39,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:39,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767166729] [2022-01-18 14:44:39,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:39,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:39,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:39,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767166729] [2022-01-18 14:44:39,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767166729] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:39,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992652686] [2022-01-18 14:44:39,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:44:39,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:39,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:39,198 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) [2022-01-18 14:44:39,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 14:44:39,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 14:44:39,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:39,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 14:44:39,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:39,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:39,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992652686] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:39,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:39,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 6] total 10 [2022-01-18 14:44:39,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012986194] [2022-01-18 14:44:39,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:39,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:44:39,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:39,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:44:39,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:44:39,597 INFO L87 Difference]: Start difference. First operand 220 states and 435 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:39,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:39,762 INFO L93 Difference]: Finished difference Result 417 states and 816 transitions. [2022-01-18 14:44:39,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:44:39,763 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 14:44:39,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:39,764 INFO L225 Difference]: With dead ends: 417 [2022-01-18 14:44:39,764 INFO L226 Difference]: Without dead ends: 410 [2022-01-18 14:44:39,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 11 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:44:39,764 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 62 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:39,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 99 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:44:39,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-01-18 14:44:39,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 330. [2022-01-18 14:44:39,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.082066869300912) internal successors, (685), 329 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:39,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 685 transitions. [2022-01-18 14:44:39,768 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 685 transitions. Word has length 27 [2022-01-18 14:44:39,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:39,768 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 685 transitions. [2022-01-18 14:44:39,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:39,768 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 685 transitions. [2022-01-18 14:44:39,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:44:39,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:39,769 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:39,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-18 14:44:39,984 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,SelfDestructingSolverStorable76 [2022-01-18 14:44:39,984 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:39,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:39,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1992776743, now seen corresponding path program 73 times [2022-01-18 14:44:39,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:39,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193329739] [2022-01-18 14:44:39,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:39,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:39,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:40,038 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:44:40,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:40,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193329739] [2022-01-18 14:44:40,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193329739] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:40,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670908309] [2022-01-18 14:44:40,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:44:40,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:40,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:40,039 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) [2022-01-18 14:44:40,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 14:44:40,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:40,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 14:44:40,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:40,354 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:40,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:44:40,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670908309] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:40,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:40,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 6] total 11 [2022-01-18 14:44:40,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528212213] [2022-01-18 14:44:40,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:40,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:44:40,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:40,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:44:40,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:44:40,438 INFO L87 Difference]: Start difference. First operand 330 states and 685 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:40,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:40,719 INFO L93 Difference]: Finished difference Result 513 states and 1037 transitions. [2022-01-18 14:44:40,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:44:40,720 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 14:44:40,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:40,721 INFO L225 Difference]: With dead ends: 513 [2022-01-18 14:44:40,721 INFO L226 Difference]: Without dead ends: 499 [2022-01-18 14:44:40,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 10 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:44:40,721 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 64 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:40,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 137 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:44:40,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-18 14:44:40,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 372. [2022-01-18 14:44:40,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.1563342318059298) internal successors, (800), 371 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:40,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 800 transitions. [2022-01-18 14:44:40,725 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 800 transitions. Word has length 27 [2022-01-18 14:44:40,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:40,725 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 800 transitions. [2022-01-18 14:44:40,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:40,725 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 800 transitions. [2022-01-18 14:44:40,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:44:40,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:40,726 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:40,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-01-18 14:44:40,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:40,926 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:40,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:40,926 INFO L85 PathProgramCache]: Analyzing trace with hash -596203559, now seen corresponding path program 74 times [2022-01-18 14:44:40,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:40,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447055977] [2022-01-18 14:44:40,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:40,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:44:40,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:40,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447055977] [2022-01-18 14:44:40,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447055977] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:40,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762222501] [2022-01-18 14:44:40,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:44:40,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:40,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:40,975 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) [2022-01-18 14:44:40,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 14:44:40,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:44:40,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:40,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 14:44:40,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:41,474 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:41,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:41,556 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:44:41,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762222501] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:41,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:41,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 6] total 12 [2022-01-18 14:44:41,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738993629] [2022-01-18 14:44:41,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:41,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:44:41,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:41,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:44:41,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:44:41,557 INFO L87 Difference]: Start difference. First operand 372 states and 800 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:41,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:41,806 INFO L93 Difference]: Finished difference Result 565 states and 1169 transitions. [2022-01-18 14:44:41,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:44:41,806 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 14:44:41,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:41,807 INFO L225 Difference]: With dead ends: 565 [2022-01-18 14:44:41,807 INFO L226 Difference]: Without dead ends: 551 [2022-01-18 14:44:41,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 9 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:44:41,808 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 80 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:41,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 125 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:44:41,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-01-18 14:44:41,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 414. [2022-01-18 14:44:41,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.205811138014528) internal successors, (911), 413 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:41,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 911 transitions. [2022-01-18 14:44:41,812 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 911 transitions. Word has length 27 [2022-01-18 14:44:41,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:41,813 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 911 transitions. [2022-01-18 14:44:41,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:41,813 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 911 transitions. [2022-01-18 14:44:41,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:44:41,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:41,813 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:41,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-01-18 14:44:42,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:42,029 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:42,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:42,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1480829913, now seen corresponding path program 75 times [2022-01-18 14:44:42,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:42,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786547800] [2022-01-18 14:44:42,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:42,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:44:42,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:42,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786547800] [2022-01-18 14:44:42,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786547800] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:42,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348886253] [2022-01-18 14:44:42,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:44:42,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:42,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:42,074 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) [2022-01-18 14:44:42,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 14:44:42,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-18 14:44:42,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:42,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 14:44:42,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:44:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:44:42,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:44:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:44:42,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348886253] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:44:42,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:44:42,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 6] total 13 [2022-01-18 14:44:42,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528294735] [2022-01-18 14:44:42,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:44:42,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:44:42,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:44:42,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:44:42,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:44:42,738 INFO L87 Difference]: Start difference. First operand 414 states and 911 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:43,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:44:43,055 INFO L93 Difference]: Finished difference Result 659 states and 1381 transitions. [2022-01-18 14:44:43,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:44:43,056 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 14:44:43,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:44:43,057 INFO L225 Difference]: With dead ends: 659 [2022-01-18 14:44:43,058 INFO L226 Difference]: Without dead ends: 645 [2022-01-18 14:44:43,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:44:43,058 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 104 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:44:43,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 129 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:44:43,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-01-18 14:44:43,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 464. [2022-01-18 14:44:43,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.2419006479481642) internal successors, (1038), 463 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:43,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1038 transitions. [2022-01-18 14:44:43,063 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1038 transitions. Word has length 27 [2022-01-18 14:44:43,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:44:43,063 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 1038 transitions. [2022-01-18 14:44:43,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:44:43,063 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1038 transitions. [2022-01-18 14:44:43,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:44:43,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:44:43,064 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:44:43,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-01-18 14:44:43,271 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,SelfDestructingSolverStorable79 [2022-01-18 14:44:43,271 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:44:43,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:44:43,271 INFO L85 PathProgramCache]: Analyzing trace with hash 350203865, now seen corresponding path program 76 times [2022-01-18 14:44:43,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:44:43,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557356108] [2022-01-18 14:44:43,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:44:43,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:44:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:44:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:44:43,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:44:43,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557356108] [2022-01-18 14:44:43,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557356108] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:44:43,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779539890] [2022-01-18 14:44:43,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:44:43,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:44:43,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:44:43,315 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) [2022-01-18 14:44:43,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 14:44:43,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:44:43,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:44:43,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 14:44:43,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2022-01-18 14:58:26,539 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 14:58:26,559 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 [2022-01-18 14:58:27,206 WARN L244 SmtUtils]: Removed 1 from assertion stack [2022-01-18 14:58:27,208 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-18 14:58:27,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-01-18 14:58:27,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:58:27,409 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 28 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-1082-1 term,while PolyPacSimplificationTermWalker was simplifying 1082 xjuncts wrt. a ATOM-1 context. [2022-01-18 14:58:27,410 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 14:58:27,410 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 14:58:27,413 INFO L732 BasicCegarLoop]: Path program histogram: [76, 2, 2, 1] [2022-01-18 14:58:27,414 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 14:58:27,414 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 14:58:27,415 INFO L202 PluginConnector]: Adding new model exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 02:58:27 BasicIcfg [2022-01-18 14:58:27,416 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 14:58:27,416 INFO L158 Benchmark]: Toolchain (without parser) took 885613.93ms. Allocated memory was 371.2MB in the beginning and 616.6MB in the end (delta: 245.4MB). Free memory was 331.2MB in the beginning and 285.6MB in the end (delta: 45.6MB). Peak memory consumption was 401.0MB. Max. memory is 16.0GB. [2022-01-18 14:58:27,416 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 371.2MB. Free memory is still 332.2MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 14:58:27,416 INFO L158 Benchmark]: Boogie Procedure Inliner took 16.64ms. Allocated memory is still 371.2MB. Free memory was 331.2MB in the beginning and 329.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 14:58:27,416 INFO L158 Benchmark]: Boogie Preprocessor took 12.08ms. Allocated memory is still 371.2MB. Free memory was 329.6MB in the beginning and 328.7MB in the end (delta: 926.5kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 14:58:27,416 INFO L158 Benchmark]: RCFGBuilder took 153.61ms. Allocated memory is still 371.2MB. Free memory was 328.7MB in the beginning and 320.3MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 14:58:27,416 INFO L158 Benchmark]: TraceAbstraction took 885427.86ms. Allocated memory was 371.2MB in the beginning and 616.6MB in the end (delta: 245.4MB). Free memory was 319.8MB in the beginning and 285.6MB in the end (delta: 34.2MB). Peak memory consumption was 390.5MB. Max. memory is 16.0GB. [2022-01-18 14:58:27,416 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 0.11ms. Allocated memory is still 371.2MB. Free memory is still 332.2MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 16.64ms. Allocated memory is still 371.2MB. Free memory was 331.2MB in the beginning and 329.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 12.08ms. Allocated memory is still 371.2MB. Free memory was 329.6MB in the beginning and 328.7MB in the end (delta: 926.5kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 153.61ms. Allocated memory is still 371.2MB. Free memory was 328.7MB in the beginning and 320.3MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 885427.86ms. Allocated memory was 371.2MB in the beginning and 616.6MB in the end (delta: 245.4MB). Free memory was 319.8MB in the beginning and 285.6MB in the end (delta: 34.2MB). Peak memory consumption was 390.5MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 38]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 28 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-1082-1 term,while PolyPacSimplificationTermWalker was simplifying 1082 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 33]: 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 28 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-1082-1 term,while PolyPacSimplificationTermWalker was simplifying 1082 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 33]: 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 28 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-1082-1 term,while PolyPacSimplificationTermWalker was simplifying 1082 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: 885.4s, OverallIterations: 81, TraceHistogramMax: 4, PathProgramHistogramMax: 76, EmptinessCheckTime: 0.0s, AutomataDifference: 29.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7272 SdHoareTripleChecker+Valid, 14.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7272 mSDsluCounter, 8370 SdHoareTripleChecker+Invalid, 12.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 12738 mSDsCounter, 1379 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 33466 IncrementalHoareTripleChecker+Invalid, 34845 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1379 mSolverCounterUnsat, 1490 mSDtfsCounter, 33466 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5321 GetRequests, 2654 SyntacticMatches, 481 SemanticMatches, 2186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27075 ImplicationChecksByTransitivity, 18.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=464occurred in iteration=80, InterpolantAutomatonStates: 2149, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 80 MinimizatonAttempts, 11938 StatesRemovedByMinimization, 80 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 13.8s InterpolantComputationTime, 3415 NumberOfCodeBlocks, 3415 NumberOfCodeBlocksAsserted, 300 NumberOfCheckSat, 4860 ConstructedInterpolants, 0 QuantifiedInterpolants, 28279 SizeOfPredicates, 274 NumberOfNonLiveVariables, 3000 ConjunctsInSsa, 657 ConjunctsInUnsatCore, 230 InterpolantComputations, 5 PerfectInterpolantSequences, 1025/4016 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