/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/difference-det.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 17:54:02,832 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 17:54:02,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 17:54:02,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-01 17:54:02,927 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-01 17:54:02,956 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 17:54:02,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 17:54:02,957 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 17:54:02,957 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 17:54:02,958 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 17:54:02,958 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 17:54:02,958 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 17:54:02,958 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 17:54:02,958 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 17:54:02,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 17:54:02,959 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 17:54:02,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 17:54:02,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 17:54:02,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 17:54:02,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 17:54:02,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 17:54:02,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 17:54:02,960 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 17:54:02,960 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 17:54:02,960 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 17:54:02,960 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 17:54:02,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 17:54:02,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 17:54:02,960 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 17:54:02,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 17:54:02,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 17:54:02,961 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 17:54:02,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 17:54:02,961 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 17:54:02,961 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 17:54:02,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 17:54:02,961 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 17:54:02,961 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 17:54:02,961 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 17:54:03,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 17:54:03,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 17:54:03,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 17:54:03,150 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 17:54:03,153 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 17:54:03,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/difference-det.wvr.bpl [2022-03-01 17:54:03,154 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/difference-det.wvr.bpl' [2022-03-01 17:54:03,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 17:54:03,179 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 17:54:03,181 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 17:54:03,181 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 17:54:03,181 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 17:54:03,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:54:03" (1/1) ... [2022-03-01 17:54:03,193 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:54:03" (1/1) ... [2022-03-01 17:54:03,201 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 17:54:03,202 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 17:54:03,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 17:54:03,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 17:54:03,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 17:54:03,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:54:03" (1/1) ... [2022-03-01 17:54:03,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:54:03" (1/1) ... [2022-03-01 17:54:03,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:54:03" (1/1) ... [2022-03-01 17:54:03,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:54:03" (1/1) ... [2022-03-01 17:54:03,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:54:03" (1/1) ... [2022-03-01 17:54:03,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:54:03" (1/1) ... [2022-03-01 17:54:03,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:54:03" (1/1) ... [2022-03-01 17:54:03,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 17:54:03,218 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 17:54:03,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 17:54:03,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 17:54:03,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:54:03" (1/1) ... [2022-03-01 17:54:03,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 17:54:03,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:03,273 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) [2022-03-01 17:54:03,292 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 [2022-03-01 17:54:03,302 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 17:54:03,302 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 17:54:03,302 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 17:54:03,302 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 17:54:03,302 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 17:54:03,302 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 17:54:03,302 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 17:54:03,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 17:54:03,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 17:54:03,303 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-01 17:54:03,303 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-01 17:54:03,303 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-01 17:54:03,303 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-03-01 17:54:03,303 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-03-01 17:54:03,303 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-03-01 17:54:03,304 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 17:54:03,335 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 17:54:03,337 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 17:54:03,410 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 17:54:03,424 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 17:54:03,424 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-01 17:54:03,426 INFO L202 PluginConnector]: Adding new model difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 05:54:03 BoogieIcfgContainer [2022-03-01 17:54:03,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 17:54:03,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 17:54:03,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 17:54:03,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 17:54:03,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:54:03" (1/2) ... [2022-03-01 17:54:03,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ebafd3a and model type difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 05:54:03, skipping insertion in model container [2022-03-01 17:54:03,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 05:54:03" (2/2) ... [2022-03-01 17:54:03,431 INFO L111 eAbstractionObserver]: Analyzing ICFG difference-det.wvr.bpl [2022-03-01 17:54:03,434 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 17:54:03,434 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 17:54:03,434 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 17:54:03,434 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 17:54:03,461 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-03-01 17:54:03,499 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 17:54:03,504 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, mLazyFiniteAutomaton=false, 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, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-01 17:54:03,504 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-03-01 17:54:03,512 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 40 transitions, 112 flow [2022-03-01 17:54:03,606 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 436 states, 435 states have (on average 3.8160919540229883) internal successors, (1660), 435 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:03,609 INFO L276 IsEmpty]: Start isEmpty. Operand has 436 states, 435 states have (on average 3.8160919540229883) internal successors, (1660), 435 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:03,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:54:03,624 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:03,625 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:03,625 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:03,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:03,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1755915471, now seen corresponding path program 1 times [2022-03-01 17:54:03,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:03,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799069509] [2022-03-01 17:54:03,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:03,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:03,893 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:03,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799069509] [2022-03-01 17:54:03,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799069509] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:54:03,895 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:54:03,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 17:54:03,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701283552] [2022-03-01 17:54:03,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:54:03,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:54:03,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:03,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:54:03,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:54:03,948 INFO L87 Difference]: Start difference. First operand has 436 states, 435 states have (on average 3.8160919540229883) internal successors, (1660), 435 states have internal predecessors, (1660), 0 states have call successors, (0), 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 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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) [2022-03-01 17:54:04,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:04,070 INFO L93 Difference]: Finished difference Result 1268 states and 4623 transitions. [2022-03-01 17:54:04,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:54:04,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:54:04,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:04,139 INFO L225 Difference]: With dead ends: 1268 [2022-03-01 17:54:04,140 INFO L226 Difference]: Without dead ends: 1057 [2022-03-01 17:54:04,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:54:04,148 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 48 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:04,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 68 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:54:04,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2022-03-01 17:54:04,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 776. [2022-03-01 17:54:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.7716129032258063) internal successors, (2923), 775 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:04,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2923 transitions. [2022-03-01 17:54:04,237 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2923 transitions. Word has length 26 [2022-03-01 17:54:04,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:04,238 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 2923 transitions. [2022-03-01 17:54:04,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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) [2022-03-01 17:54:04,238 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2923 transitions. [2022-03-01 17:54:04,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:54:04,243 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:04,243 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:04,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 17:54:04,244 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:04,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:04,244 INFO L85 PathProgramCache]: Analyzing trace with hash -46127411, now seen corresponding path program 1 times [2022-03-01 17:54:04,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:04,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101665421] [2022-03-01 17:54:04,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:04,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:04,323 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:04,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101665421] [2022-03-01 17:54:04,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101665421] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:04,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739548888] [2022-03-01 17:54:04,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:04,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:04,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:04,326 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) [2022-03-01 17:54:04,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 17:54:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:04,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 17:54:04,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:04,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:04,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739548888] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:04,669 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-01 17:54:04,669 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2022-03-01 17:54:04,670 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221984541] [2022-03-01 17:54:04,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:54:04,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:54:04,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:04,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:54:04,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:54:04,672 INFO L87 Difference]: Start difference. First operand 776 states and 2923 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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) [2022-03-01 17:54:04,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:04,830 INFO L93 Difference]: Finished difference Result 1444 states and 5320 transitions. [2022-03-01 17:54:04,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:54:04,830 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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 28 [2022-03-01 17:54:04,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:04,838 INFO L225 Difference]: With dead ends: 1444 [2022-03-01 17:54:04,839 INFO L226 Difference]: Without dead ends: 1444 [2022-03-01 17:54:04,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:54:04,840 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 124 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:04,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 90 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:54:04,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2022-03-01 17:54:04,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 868. [2022-03-01 17:54:04,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.795847750865052) internal successors, (3291), 867 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:04,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3291 transitions. [2022-03-01 17:54:04,876 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3291 transitions. Word has length 28 [2022-03-01 17:54:04,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:04,876 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 3291 transitions. [2022-03-01 17:54:04,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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) [2022-03-01 17:54:04,877 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3291 transitions. [2022-03-01 17:54:04,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:54:04,879 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:04,879 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:04,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:05,095 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 [2022-03-01 17:54:05,096 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:05,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:05,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1167628143, now seen corresponding path program 1 times [2022-03-01 17:54:05,097 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:05,097 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996898078] [2022-03-01 17:54:05,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:05,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:05,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:05,160 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:05,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996898078] [2022-03-01 17:54:05,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996898078] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:54:05,161 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:54:05,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:54:05,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408939167] [2022-03-01 17:54:05,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:54:05,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:54:05,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:05,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:54:05,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:54:05,162 INFO L87 Difference]: Start difference. First operand 868 states and 3291 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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) [2022-03-01 17:54:05,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:05,249 INFO L93 Difference]: Finished difference Result 1101 states and 3979 transitions. [2022-03-01 17:54:05,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:54:05,250 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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 28 [2022-03-01 17:54:05,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:05,255 INFO L225 Difference]: With dead ends: 1101 [2022-03-01 17:54:05,255 INFO L226 Difference]: Without dead ends: 1047 [2022-03-01 17:54:05,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:54:05,257 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 82 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:05,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 97 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:54:05,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2022-03-01 17:54:05,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 912. [2022-03-01 17:54:05,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 3.773874862788145) internal successors, (3438), 911 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:05,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 3438 transitions. [2022-03-01 17:54:05,283 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 3438 transitions. Word has length 28 [2022-03-01 17:54:05,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:05,284 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 3438 transitions. [2022-03-01 17:54:05,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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) [2022-03-01 17:54:05,284 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 3438 transitions. [2022-03-01 17:54:05,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:54:05,286 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:05,286 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:05,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-01 17:54:05,287 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:05,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:05,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1666995535, now seen corresponding path program 2 times [2022-03-01 17:54:05,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:05,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932702923] [2022-03-01 17:54:05,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:05,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:05,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:05,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:05,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932702923] [2022-03-01 17:54:05,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932702923] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:54:05,328 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:54:05,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:54:05,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861031719] [2022-03-01 17:54:05,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:54:05,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:54:05,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:05,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:54:05,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:54:05,329 INFO L87 Difference]: Start difference. First operand 912 states and 3438 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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) [2022-03-01 17:54:05,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:05,395 INFO L93 Difference]: Finished difference Result 834 states and 3134 transitions. [2022-03-01 17:54:05,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:54:05,395 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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 28 [2022-03-01 17:54:05,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:05,400 INFO L225 Difference]: With dead ends: 834 [2022-03-01 17:54:05,400 INFO L226 Difference]: Without dead ends: 834 [2022-03-01 17:54:05,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:54:05,401 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:05,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 80 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:54:05,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-03-01 17:54:05,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 774. [2022-03-01 17:54:05,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.8007761966364813) internal successors, (2938), 773 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:05,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2938 transitions. [2022-03-01 17:54:05,421 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2938 transitions. Word has length 28 [2022-03-01 17:54:05,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:05,421 INFO L470 AbstractCegarLoop]: Abstraction has 774 states and 2938 transitions. [2022-03-01 17:54:05,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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) [2022-03-01 17:54:05,421 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2938 transitions. [2022-03-01 17:54:05,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:54:05,423 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:05,423 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:05,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-01 17:54:05,423 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:05,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:05,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1980069109, now seen corresponding path program 2 times [2022-03-01 17:54:05,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:05,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819766912] [2022-03-01 17:54:05,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:05,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:05,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:05,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:05,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819766912] [2022-03-01 17:54:05,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819766912] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:54:05,458 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:54:05,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:54:05,459 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067842169] [2022-03-01 17:54:05,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:54:05,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:54:05,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:05,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:54:05,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:54:05,460 INFO L87 Difference]: Start difference. First operand 774 states and 2938 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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) [2022-03-01 17:54:05,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:05,546 INFO L93 Difference]: Finished difference Result 878 states and 3300 transitions. [2022-03-01 17:54:05,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:54:05,547 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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 28 [2022-03-01 17:54:05,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:05,551 INFO L225 Difference]: With dead ends: 878 [2022-03-01 17:54:05,551 INFO L226 Difference]: Without dead ends: 838 [2022-03-01 17:54:05,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:54:05,552 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 119 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:05,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 60 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:54:05,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-03-01 17:54:05,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 726. [2022-03-01 17:54:05,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 3.8096551724137933) internal successors, (2762), 725 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:05,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2762 transitions. [2022-03-01 17:54:05,570 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2762 transitions. Word has length 28 [2022-03-01 17:54:05,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:05,570 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 2762 transitions. [2022-03-01 17:54:05,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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) [2022-03-01 17:54:05,570 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2762 transitions. [2022-03-01 17:54:05,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:54:05,572 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:05,572 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:05,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-01 17:54:05,573 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:05,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:05,573 INFO L85 PathProgramCache]: Analyzing trace with hash 276238829, now seen corresponding path program 1 times [2022-03-01 17:54:05,573 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:05,573 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413343214] [2022-03-01 17:54:05,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:05,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:05,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:05,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:05,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413343214] [2022-03-01 17:54:05,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413343214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:05,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654537924] [2022-03-01 17:54:05,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:05,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:05,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:05,640 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) [2022-03-01 17:54:05,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 17:54:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:05,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:54:05,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:05,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:05,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654537924] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:05,976 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:05,976 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 8 [2022-03-01 17:54:05,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829482741] [2022-03-01 17:54:05,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:05,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 17:54:05,977 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:05,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 17:54:05,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:54:05,977 INFO L87 Difference]: Start difference. First operand 726 states and 2762 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:06,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:06,092 INFO L93 Difference]: Finished difference Result 3314 states and 12458 transitions. [2022-03-01 17:54:06,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:54:06,093 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:54:06,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:06,110 INFO L225 Difference]: With dead ends: 3314 [2022-03-01 17:54:06,110 INFO L226 Difference]: Without dead ends: 3000 [2022-03-01 17:54:06,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:54:06,112 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 87 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:06,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 289 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:54:06,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2022-03-01 17:54:06,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 2163. [2022-03-01 17:54:06,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 4.01063829787234) internal successors, (8671), 2162 states have internal predecessors, (8671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:06,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 8671 transitions. [2022-03-01 17:54:06,183 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 8671 transitions. Word has length 30 [2022-03-01 17:54:06,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:06,183 INFO L470 AbstractCegarLoop]: Abstraction has 2163 states and 8671 transitions. [2022-03-01 17:54:06,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:06,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 8671 transitions. [2022-03-01 17:54:06,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:54:06,189 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:06,189 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:06,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-01 17:54:06,403 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 [2022-03-01 17:54:06,403 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:06,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:06,404 INFO L85 PathProgramCache]: Analyzing trace with hash -156136659, now seen corresponding path program 2 times [2022-03-01 17:54:06,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:06,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662637166] [2022-03-01 17:54:06,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:06,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:06,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:54:06,459 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:06,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662637166] [2022-03-01 17:54:06,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662637166] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:54:06,459 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:54:06,459 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:54:06,459 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630185668] [2022-03-01 17:54:06,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:54:06,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:54:06,460 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:06,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:54:06,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:54:06,460 INFO L87 Difference]: Start difference. First operand 2163 states and 8671 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:06,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:06,547 INFO L93 Difference]: Finished difference Result 3426 states and 13470 transitions. [2022-03-01 17:54:06,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:54:06,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:54:06,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:06,566 INFO L225 Difference]: With dead ends: 3426 [2022-03-01 17:54:06,566 INFO L226 Difference]: Without dead ends: 3395 [2022-03-01 17:54:06,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:54:06,567 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 73 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:06,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 134 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:54:06,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2022-03-01 17:54:06,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 2948. [2022-03-01 17:54:06,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2948 states, 2947 states have (on average 4.058025110281642) internal successors, (11959), 2947 states have internal predecessors, (11959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:06,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 11959 transitions. [2022-03-01 17:54:06,679 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 11959 transitions. Word has length 30 [2022-03-01 17:54:06,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:06,680 INFO L470 AbstractCegarLoop]: Abstraction has 2948 states and 11959 transitions. [2022-03-01 17:54:06,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:06,680 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 11959 transitions. [2022-03-01 17:54:06,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:06,689 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:06,689 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:06,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-01 17:54:06,689 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:06,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:06,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1650400021, now seen corresponding path program 3 times [2022-03-01 17:54:06,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:06,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832502603] [2022-03-01 17:54:06,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:06,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:06,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:06,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:06,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832502603] [2022-03-01 17:54:06,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832502603] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:06,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351424779] [2022-03-01 17:54:06,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:54:06,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:06,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:06,767 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) [2022-03-01 17:54:06,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 17:54:06,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:54:06,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:06,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:54:06,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:06,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:07,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351424779] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:07,002 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:07,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-03-01 17:54:07,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61116196] [2022-03-01 17:54:07,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:07,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:54:07,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:07,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:54:07,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:54:07,003 INFO L87 Difference]: Start difference. First operand 2948 states and 11959 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:07,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:07,557 INFO L93 Difference]: Finished difference Result 11439 states and 44960 transitions. [2022-03-01 17:54:07,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:54:07,558 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 17:54:07,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:07,628 INFO L225 Difference]: With dead ends: 11439 [2022-03-01 17:54:07,628 INFO L226 Difference]: Without dead ends: 11439 [2022-03-01 17:54:07,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:54:07,629 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 345 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:07,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 473 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:54:07,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11439 states. [2022-03-01 17:54:07,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11439 to 4372. [2022-03-01 17:54:07,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4372 states, 4371 states have (on average 4.153511782200869) internal successors, (18155), 4371 states have internal predecessors, (18155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:07,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4372 states to 4372 states and 18155 transitions. [2022-03-01 17:54:07,859 INFO L78 Accepts]: Start accepts. Automaton has 4372 states and 18155 transitions. Word has length 32 [2022-03-01 17:54:07,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:07,859 INFO L470 AbstractCegarLoop]: Abstraction has 4372 states and 18155 transitions. [2022-03-01 17:54:07,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:07,859 INFO L276 IsEmpty]: Start isEmpty. Operand 4372 states and 18155 transitions. [2022-03-01 17:54:07,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:07,871 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:07,871 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:07,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:08,089 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 [2022-03-01 17:54:08,089 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:08,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:08,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1759037843, now seen corresponding path program 1 times [2022-03-01 17:54:08,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:08,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420349989] [2022-03-01 17:54:08,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:08,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:54:08,189 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:08,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420349989] [2022-03-01 17:54:08,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420349989] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:08,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865734584] [2022-03-01 17:54:08,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:08,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:08,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:08,190 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) [2022-03-01 17:54:08,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 17:54:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:08,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 17:54:08,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:54:08,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:54:08,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865734584] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:08,446 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-01 17:54:08,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 11 [2022-03-01 17:54:08,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694136276] [2022-03-01 17:54:08,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:54:08,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:54:08,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:08,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:54:08,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:54:08,448 INFO L87 Difference]: Start difference. First operand 4372 states and 18155 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2022-03-01 17:54:08,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:08,567 INFO L93 Difference]: Finished difference Result 9085 states and 36933 transitions. [2022-03-01 17:54:08,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:54:08,567 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 32 [2022-03-01 17:54:08,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:08,599 INFO L225 Difference]: With dead ends: 9085 [2022-03-01 17:54:08,599 INFO L226 Difference]: Without dead ends: 9085 [2022-03-01 17:54:08,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:54:08,601 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 116 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:08,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 90 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:54:08,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9085 states. [2022-03-01 17:54:08,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9085 to 5549. [2022-03-01 17:54:08,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5548 states have (on average 4.195385724585436) internal successors, (23276), 5548 states have internal predecessors, (23276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:08,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 23276 transitions. [2022-03-01 17:54:08,773 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 23276 transitions. Word has length 32 [2022-03-01 17:54:08,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:08,773 INFO L470 AbstractCegarLoop]: Abstraction has 5549 states and 23276 transitions. [2022-03-01 17:54:08,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2022-03-01 17:54:08,774 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 23276 transitions. [2022-03-01 17:54:08,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:08,788 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:08,788 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:08,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:09,004 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 [2022-03-01 17:54:09,004 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:09,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:09,005 INFO L85 PathProgramCache]: Analyzing trace with hash 146684591, now seen corresponding path program 4 times [2022-03-01 17:54:09,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:09,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169699708] [2022-03-01 17:54:09,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:09,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:09,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:09,042 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:09,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169699708] [2022-03-01 17:54:09,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169699708] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:09,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675011377] [2022-03-01 17:54:09,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:54:09,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:09,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:09,043 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) [2022-03-01 17:54:09,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 17:54:09,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:54:09,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:09,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:54:09,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:09,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:09,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:09,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675011377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:09,270 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:09,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-01 17:54:09,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994629443] [2022-03-01 17:54:09,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:09,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:54:09,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:09,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:54:09,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:54:09,271 INFO L87 Difference]: Start difference. First operand 5549 states and 23276 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:09,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:09,773 INFO L93 Difference]: Finished difference Result 15361 states and 62588 transitions. [2022-03-01 17:54:09,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:54:09,773 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 17:54:09,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:09,842 INFO L225 Difference]: With dead ends: 15361 [2022-03-01 17:54:09,842 INFO L226 Difference]: Without dead ends: 15091 [2022-03-01 17:54:09,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:54:09,842 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 517 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:09,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 293 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:54:09,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15091 states. [2022-03-01 17:54:10,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15091 to 8451. [2022-03-01 17:54:10,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8451 states, 8450 states have (on average 4.295739644970414) internal successors, (36299), 8450 states have internal predecessors, (36299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:10,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8451 states to 8451 states and 36299 transitions. [2022-03-01 17:54:10,159 INFO L78 Accepts]: Start accepts. Automaton has 8451 states and 36299 transitions. Word has length 32 [2022-03-01 17:54:10,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:10,160 INFO L470 AbstractCegarLoop]: Abstraction has 8451 states and 36299 transitions. [2022-03-01 17:54:10,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:10,160 INFO L276 IsEmpty]: Start isEmpty. Operand 8451 states and 36299 transitions. [2022-03-01 17:54:10,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:10,181 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:10,181 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:10,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:10,413 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 [2022-03-01 17:54:10,414 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:10,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:10,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1750324885, now seen corresponding path program 1 times [2022-03-01 17:54:10,414 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:10,414 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825672152] [2022-03-01 17:54:10,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:10,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:54:10,452 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:10,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825672152] [2022-03-01 17:54:10,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825672152] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:54:10,453 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:54:10,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-01 17:54:10,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32678565] [2022-03-01 17:54:10,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:54:10,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:54:10,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:10,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:54:10,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:54:10,456 INFO L87 Difference]: Start difference. First operand 8451 states and 36299 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2022-03-01 17:54:10,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:10,594 INFO L93 Difference]: Finished difference Result 11634 states and 49174 transitions. [2022-03-01 17:54:10,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:54:10,594 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 32 [2022-03-01 17:54:10,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:10,669 INFO L225 Difference]: With dead ends: 11634 [2022-03-01 17:54:10,669 INFO L226 Difference]: Without dead ends: 11496 [2022-03-01 17:54:10,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:54:10,670 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 74 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:10,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 100 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:54:10,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11496 states. [2022-03-01 17:54:11,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11496 to 9206. [2022-03-01 17:54:11,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9206 states, 9205 states have (on average 4.329277566539924) internal successors, (39851), 9205 states have internal predecessors, (39851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:11,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9206 states to 9206 states and 39851 transitions. [2022-03-01 17:54:11,116 INFO L78 Accepts]: Start accepts. Automaton has 9206 states and 39851 transitions. Word has length 32 [2022-03-01 17:54:11,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:11,116 INFO L470 AbstractCegarLoop]: Abstraction has 9206 states and 39851 transitions. [2022-03-01 17:54:11,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2022-03-01 17:54:11,116 INFO L276 IsEmpty]: Start isEmpty. Operand 9206 states and 39851 transitions. [2022-03-01 17:54:11,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:11,139 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:11,139 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:11,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-01 17:54:11,139 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:11,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:11,139 INFO L85 PathProgramCache]: Analyzing trace with hash -431820821, now seen corresponding path program 2 times [2022-03-01 17:54:11,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:11,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772897195] [2022-03-01 17:54:11,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:11,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:54:11,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:11,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772897195] [2022-03-01 17:54:11,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772897195] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:54:11,188 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:54:11,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-01 17:54:11,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814842240] [2022-03-01 17:54:11,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:54:11,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:54:11,189 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:11,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:54:11,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:54:11,190 INFO L87 Difference]: Start difference. First operand 9206 states and 39851 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2022-03-01 17:54:11,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:11,292 INFO L93 Difference]: Finished difference Result 10977 states and 46247 transitions. [2022-03-01 17:54:11,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:54:11,292 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 32 [2022-03-01 17:54:11,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:11,328 INFO L225 Difference]: With dead ends: 10977 [2022-03-01 17:54:11,329 INFO L226 Difference]: Without dead ends: 10950 [2022-03-01 17:54:11,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:54:11,329 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 77 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:11,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 73 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:54:11,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10950 states. [2022-03-01 17:54:11,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10950 to 9177. [2022-03-01 17:54:11,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9177 states, 9176 states have (on average 4.283129904097646) internal successors, (39302), 9176 states have internal predecessors, (39302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:11,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9177 states to 9177 states and 39302 transitions. [2022-03-01 17:54:11,715 INFO L78 Accepts]: Start accepts. Automaton has 9177 states and 39302 transitions. Word has length 32 [2022-03-01 17:54:11,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:11,716 INFO L470 AbstractCegarLoop]: Abstraction has 9177 states and 39302 transitions. [2022-03-01 17:54:11,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2022-03-01 17:54:11,716 INFO L276 IsEmpty]: Start isEmpty. Operand 9177 states and 39302 transitions. [2022-03-01 17:54:11,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:11,738 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:11,739 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:11,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-01 17:54:11,739 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:11,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:11,739 INFO L85 PathProgramCache]: Analyzing trace with hash -77046865, now seen corresponding path program 2 times [2022-03-01 17:54:11,739 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:11,739 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330863319] [2022-03-01 17:54:11,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:11,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:11,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:54:11,778 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:11,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330863319] [2022-03-01 17:54:11,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330863319] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:54:11,778 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:54:11,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-01 17:54:11,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838141165] [2022-03-01 17:54:11,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:54:11,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:54:11,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:11,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:54:11,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:54:11,780 INFO L87 Difference]: Start difference. First operand 9177 states and 39302 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2022-03-01 17:54:11,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:11,913 INFO L93 Difference]: Finished difference Result 11062 states and 46211 transitions. [2022-03-01 17:54:11,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:54:11,913 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 32 [2022-03-01 17:54:11,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:11,948 INFO L225 Difference]: With dead ends: 11062 [2022-03-01 17:54:11,949 INFO L226 Difference]: Without dead ends: 11002 [2022-03-01 17:54:11,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:54:11,949 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 112 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:11,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 81 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:54:11,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11002 states. [2022-03-01 17:54:12,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11002 to 9261. [2022-03-01 17:54:12,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9261 states, 9260 states have (on average 4.27645788336933) internal successors, (39600), 9260 states have internal predecessors, (39600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:12,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9261 states to 9261 states and 39600 transitions. [2022-03-01 17:54:12,276 INFO L78 Accepts]: Start accepts. Automaton has 9261 states and 39600 transitions. Word has length 32 [2022-03-01 17:54:12,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:12,276 INFO L470 AbstractCegarLoop]: Abstraction has 9261 states and 39600 transitions. [2022-03-01 17:54:12,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2022-03-01 17:54:12,277 INFO L276 IsEmpty]: Start isEmpty. Operand 9261 states and 39600 transitions. [2022-03-01 17:54:12,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:12,298 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:12,298 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:12,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-01 17:54:12,299 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:12,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:12,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1662113073, now seen corresponding path program 5 times [2022-03-01 17:54:12,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:12,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366423613] [2022-03-01 17:54:12,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:12,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:12,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:12,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366423613] [2022-03-01 17:54:12,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366423613] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:12,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522314752] [2022-03-01 17:54:12,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:54:12,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:12,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:12,354 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) [2022-03-01 17:54:12,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 17:54:12,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:54:12,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:12,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:54:12,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:12,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:12,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:12,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522314752] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:12,659 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:12,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-03-01 17:54:12,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197951053] [2022-03-01 17:54:12,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:12,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:54:12,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:12,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:54:12,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:54:12,660 INFO L87 Difference]: Start difference. First operand 9261 states and 39600 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:13,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:13,334 INFO L93 Difference]: Finished difference Result 19937 states and 80608 transitions. [2022-03-01 17:54:13,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:54:13,334 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 17:54:13,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:13,412 INFO L225 Difference]: With dead ends: 19937 [2022-03-01 17:54:13,412 INFO L226 Difference]: Without dead ends: 19937 [2022-03-01 17:54:13,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=741, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:54:13,413 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 418 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:13,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 501 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:54:13,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19937 states. [2022-03-01 17:54:13,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19937 to 10772. [2022-03-01 17:54:13,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10772 states, 10771 states have (on average 4.3019218271284005) internal successors, (46336), 10771 states have internal predecessors, (46336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:13,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10772 states to 10772 states and 46336 transitions. [2022-03-01 17:54:13,847 INFO L78 Accepts]: Start accepts. Automaton has 10772 states and 46336 transitions. Word has length 32 [2022-03-01 17:54:13,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:13,847 INFO L470 AbstractCegarLoop]: Abstraction has 10772 states and 46336 transitions. [2022-03-01 17:54:13,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:13,847 INFO L276 IsEmpty]: Start isEmpty. Operand 10772 states and 46336 transitions. [2022-03-01 17:54:13,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:13,872 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:13,872 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:13,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:14,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:14,076 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:14,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:14,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1014210421, now seen corresponding path program 6 times [2022-03-01 17:54:14,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:14,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180903903] [2022-03-01 17:54:14,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:14,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:14,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:14,117 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:14,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180903903] [2022-03-01 17:54:14,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180903903] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:14,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540707528] [2022-03-01 17:54:14,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:54:14,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:14,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:14,118 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) [2022-03-01 17:54:14,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 17:54:14,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:54:14,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:14,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:54:14,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:14,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:14,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540707528] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:14,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:14,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-03-01 17:54:14,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687582608] [2022-03-01 17:54:14,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:14,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:54:14,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:14,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:54:14,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:54:14,355 INFO L87 Difference]: Start difference. First operand 10772 states and 46336 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:14,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:14,932 INFO L93 Difference]: Finished difference Result 17283 states and 70897 transitions. [2022-03-01 17:54:14,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:54:14,933 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 17:54:14,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:14,988 INFO L225 Difference]: With dead ends: 17283 [2022-03-01 17:54:14,988 INFO L226 Difference]: Without dead ends: 17145 [2022-03-01 17:54:14,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:54:14,989 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 330 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:14,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 324 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:54:15,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17145 states. [2022-03-01 17:54:15,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17145 to 10795. [2022-03-01 17:54:15,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10795 states, 10794 states have (on average 4.285158421345192) internal successors, (46254), 10794 states have internal predecessors, (46254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:15,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10795 states to 10795 states and 46254 transitions. [2022-03-01 17:54:15,424 INFO L78 Accepts]: Start accepts. Automaton has 10795 states and 46254 transitions. Word has length 32 [2022-03-01 17:54:15,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:15,424 INFO L470 AbstractCegarLoop]: Abstraction has 10795 states and 46254 transitions. [2022-03-01 17:54:15,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:15,424 INFO L276 IsEmpty]: Start isEmpty. Operand 10795 states and 46254 transitions. [2022-03-01 17:54:15,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:15,446 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:15,446 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:15,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-01 17:54:15,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:15,647 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:15,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:15,648 INFO L85 PathProgramCache]: Analyzing trace with hash -237310289, now seen corresponding path program 7 times [2022-03-01 17:54:15,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:15,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105802543] [2022-03-01 17:54:15,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:15,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:54:15,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:15,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105802543] [2022-03-01 17:54:15,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105802543] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:15,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50066096] [2022-03-01 17:54:15,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:54:15,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:15,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:15,703 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) [2022-03-01 17:54:15,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 17:54:15,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:15,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:54:15,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:15,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:16,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50066096] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:16,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:16,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-03-01 17:54:16,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824064729] [2022-03-01 17:54:16,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:16,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:54:16,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:16,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:54:16,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:54:16,017 INFO L87 Difference]: Start difference. First operand 10795 states and 46254 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:16,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:16,780 INFO L93 Difference]: Finished difference Result 30373 states and 124811 transitions. [2022-03-01 17:54:16,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:54:16,780 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 17:54:16,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:16,902 INFO L225 Difference]: With dead ends: 30373 [2022-03-01 17:54:16,902 INFO L226 Difference]: Without dead ends: 30373 [2022-03-01 17:54:16,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=434, Invalid=972, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:54:16,903 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 462 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:16,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 453 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:54:16,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30373 states. [2022-03-01 17:54:17,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30373 to 14993. [2022-03-01 17:54:17,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14993 states, 14992 states have (on average 4.368729989327641) internal successors, (65496), 14992 states have internal predecessors, (65496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:17,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14993 states to 14993 states and 65496 transitions. [2022-03-01 17:54:17,564 INFO L78 Accepts]: Start accepts. Automaton has 14993 states and 65496 transitions. Word has length 32 [2022-03-01 17:54:17,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:17,565 INFO L470 AbstractCegarLoop]: Abstraction has 14993 states and 65496 transitions. [2022-03-01 17:54:17,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:17,565 INFO L276 IsEmpty]: Start isEmpty. Operand 14993 states and 65496 transitions. [2022-03-01 17:54:17,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:17,600 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:17,600 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:17,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:17,801 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,SelfDestructingSolverStorable15 [2022-03-01 17:54:17,801 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:17,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:17,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1931533901, now seen corresponding path program 8 times [2022-03-01 17:54:17,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:17,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955802582] [2022-03-01 17:54:17,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:17,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:54:17,846 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:17,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955802582] [2022-03-01 17:54:17,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955802582] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:17,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853945996] [2022-03-01 17:54:17,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:54:17,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:17,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:17,847 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) [2022-03-01 17:54:17,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 17:54:17,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:54:17,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:17,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:54:17,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:18,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:18,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:18,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853945996] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:18,260 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:18,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-03-01 17:54:18,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479606036] [2022-03-01 17:54:18,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:18,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:54:18,261 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:18,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:54:18,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:54:18,261 INFO L87 Difference]: Start difference. First operand 14993 states and 65496 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:18,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:18,646 INFO L93 Difference]: Finished difference Result 19071 states and 81167 transitions. [2022-03-01 17:54:18,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:54:18,647 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 17:54:18,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:18,714 INFO L225 Difference]: With dead ends: 19071 [2022-03-01 17:54:18,714 INFO L226 Difference]: Without dead ends: 19009 [2022-03-01 17:54:18,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:54:18,715 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 390 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:18,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 273 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:54:18,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19009 states. [2022-03-01 17:54:19,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19009 to 15495. [2022-03-01 17:54:19,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15495 states, 15494 states have (on average 4.3805344004130635) internal successors, (67872), 15494 states have internal predecessors, (67872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:19,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15495 states to 15495 states and 67872 transitions. [2022-03-01 17:54:19,164 INFO L78 Accepts]: Start accepts. Automaton has 15495 states and 67872 transitions. Word has length 32 [2022-03-01 17:54:19,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:19,164 INFO L470 AbstractCegarLoop]: Abstraction has 15495 states and 67872 transitions. [2022-03-01 17:54:19,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:19,165 INFO L276 IsEmpty]: Start isEmpty. Operand 15495 states and 67872 transitions. [2022-03-01 17:54:19,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:19,199 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:19,199 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:19,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-01 17:54:19,415 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,SelfDestructingSolverStorable16 [2022-03-01 17:54:19,415 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:19,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:19,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1018081403, now seen corresponding path program 9 times [2022-03-01 17:54:19,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:19,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591977083] [2022-03-01 17:54:19,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:19,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:19,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:54:19,459 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:19,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591977083] [2022-03-01 17:54:19,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591977083] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:19,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628702245] [2022-03-01 17:54:19,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:54:19,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:19,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:19,460 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) [2022-03-01 17:54:19,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 17:54:19,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:54:19,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:19,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:54:19,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:19,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:19,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:19,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628702245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:19,782 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:19,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-03-01 17:54:19,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398804696] [2022-03-01 17:54:19,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:19,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:54:19,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:19,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:54:19,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:54:19,783 INFO L87 Difference]: Start difference. First operand 15495 states and 67872 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:20,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:20,267 INFO L93 Difference]: Finished difference Result 25596 states and 106759 transitions. [2022-03-01 17:54:20,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:54:20,267 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 17:54:20,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:20,364 INFO L225 Difference]: With dead ends: 25596 [2022-03-01 17:54:20,364 INFO L226 Difference]: Without dead ends: 25518 [2022-03-01 17:54:20,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=309, Invalid=683, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:54:20,365 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 492 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:20,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 256 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:54:20,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25518 states. [2022-03-01 17:54:20,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25518 to 15518. [2022-03-01 17:54:20,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15518 states, 15517 states have (on average 4.374299155764645) internal successors, (67876), 15517 states have internal predecessors, (67876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:20,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15518 states to 15518 states and 67876 transitions. [2022-03-01 17:54:20,911 INFO L78 Accepts]: Start accepts. Automaton has 15518 states and 67876 transitions. Word has length 32 [2022-03-01 17:54:20,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:20,911 INFO L470 AbstractCegarLoop]: Abstraction has 15518 states and 67876 transitions. [2022-03-01 17:54:20,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:20,911 INFO L276 IsEmpty]: Start isEmpty. Operand 15518 states and 67876 transitions. [2022-03-01 17:54:20,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:20,952 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:20,952 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:20,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:21,169 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,SelfDestructingSolverStorable17 [2022-03-01 17:54:21,169 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:21,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:21,170 INFO L85 PathProgramCache]: Analyzing trace with hash 188789747, now seen corresponding path program 10 times [2022-03-01 17:54:21,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:21,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920595673] [2022-03-01 17:54:21,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:21,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:21,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:21,218 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:21,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920595673] [2022-03-01 17:54:21,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920595673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:21,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187143196] [2022-03-01 17:54:21,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:54:21,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:21,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:21,220 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) [2022-03-01 17:54:21,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 17:54:21,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:54:21,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:21,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:54:21,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:21,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:21,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:21,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187143196] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:21,487 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:21,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-01 17:54:21,488 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280033462] [2022-03-01 17:54:21,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:21,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:54:21,488 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:21,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:54:21,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:54:21,489 INFO L87 Difference]: Start difference. First operand 15518 states and 67876 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:22,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:22,017 INFO L93 Difference]: Finished difference Result 25214 states and 104840 transitions. [2022-03-01 17:54:22,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:54:22,018 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 17:54:22,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:22,117 INFO L225 Difference]: With dead ends: 25214 [2022-03-01 17:54:22,117 INFO L226 Difference]: Without dead ends: 25094 [2022-03-01 17:54:22,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=309, Invalid=683, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:54:22,118 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 443 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:22,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 275 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:54:22,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25094 states. [2022-03-01 17:54:22,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25094 to 16132. [2022-03-01 17:54:22,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16132 states, 16131 states have (on average 4.372140598846941) internal successors, (70527), 16131 states have internal predecessors, (70527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:22,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 70527 transitions. [2022-03-01 17:54:22,666 INFO L78 Accepts]: Start accepts. Automaton has 16132 states and 70527 transitions. Word has length 32 [2022-03-01 17:54:22,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:22,667 INFO L470 AbstractCegarLoop]: Abstraction has 16132 states and 70527 transitions. [2022-03-01 17:54:22,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:22,667 INFO L276 IsEmpty]: Start isEmpty. Operand 16132 states and 70527 transitions. [2022-03-01 17:54:22,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 17:54:22,705 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:22,705 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:22,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-01 17:54:22,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:22,906 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:22,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:22,906 INFO L85 PathProgramCache]: Analyzing trace with hash -222345683, now seen corresponding path program 11 times [2022-03-01 17:54:22,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:22,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65897285] [2022-03-01 17:54:22,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:22,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:22,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:22,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65897285] [2022-03-01 17:54:22,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65897285] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:22,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853283821] [2022-03-01 17:54:22,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:54:22,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:22,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:22,969 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) [2022-03-01 17:54:22,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 17:54:22,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:54:22,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:22,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:54:22,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:23,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:23,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853283821] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:23,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:23,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 11 [2022-03-01 17:54:23,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947471429] [2022-03-01 17:54:23,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:23,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:54:23,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:23,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:54:23,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:54:23,307 INFO L87 Difference]: Start difference. First operand 16132 states and 70527 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:23,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:23,660 INFO L93 Difference]: Finished difference Result 30028 states and 127196 transitions. [2022-03-01 17:54:23,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:54:23,661 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-01 17:54:23,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:23,771 INFO L225 Difference]: With dead ends: 30028 [2022-03-01 17:54:23,771 INFO L226 Difference]: Without dead ends: 29440 [2022-03-01 17:54:23,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:54:23,772 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 197 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:23,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 397 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:54:23,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29440 states. [2022-03-01 17:54:24,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29440 to 21834. [2022-03-01 17:54:24,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21834 states, 21833 states have (on average 4.3858379517244535) internal successors, (95756), 21833 states have internal predecessors, (95756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:24,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21834 states to 21834 states and 95756 transitions. [2022-03-01 17:54:24,417 INFO L78 Accepts]: Start accepts. Automaton has 21834 states and 95756 transitions. Word has length 34 [2022-03-01 17:54:24,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:24,417 INFO L470 AbstractCegarLoop]: Abstraction has 21834 states and 95756 transitions. [2022-03-01 17:54:24,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:24,418 INFO L276 IsEmpty]: Start isEmpty. Operand 21834 states and 95756 transitions. [2022-03-01 17:54:24,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 17:54:24,471 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:24,471 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:24,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-01 17:54:24,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:24,671 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:24,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:24,672 INFO L85 PathProgramCache]: Analyzing trace with hash -911583255, now seen corresponding path program 12 times [2022-03-01 17:54:24,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:24,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934609019] [2022-03-01 17:54:24,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:24,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:24,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:54:24,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:24,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934609019] [2022-03-01 17:54:24,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934609019] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:24,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184446345] [2022-03-01 17:54:24,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:54:24,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:24,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:24,732 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) [2022-03-01 17:54:24,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 17:54:24,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:54:24,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:24,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:54:24,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:24,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:24,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:54:25,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184446345] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:25,054 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:25,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 11 [2022-03-01 17:54:25,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745901348] [2022-03-01 17:54:25,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:25,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:54:25,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:25,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:54:25,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:54:25,055 INFO L87 Difference]: Start difference. First operand 21834 states and 95756 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:25,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:25,673 INFO L93 Difference]: Finished difference Result 60940 states and 262767 transitions. [2022-03-01 17:54:25,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:54:25,674 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-01 17:54:25,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:25,953 INFO L225 Difference]: With dead ends: 60940 [2022-03-01 17:54:25,953 INFO L226 Difference]: Without dead ends: 58958 [2022-03-01 17:54:25,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:54:25,954 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 180 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:25,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 625 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:54:26,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58958 states. [2022-03-01 17:54:27,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58958 to 39850. [2022-03-01 17:54:27,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39850 states, 39849 states have (on average 4.48199452934829) internal successors, (178603), 39849 states have internal predecessors, (178603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:27,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39850 states to 39850 states and 178603 transitions. [2022-03-01 17:54:27,851 INFO L78 Accepts]: Start accepts. Automaton has 39850 states and 178603 transitions. Word has length 34 [2022-03-01 17:54:27,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:27,852 INFO L470 AbstractCegarLoop]: Abstraction has 39850 states and 178603 transitions. [2022-03-01 17:54:27,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:27,852 INFO L276 IsEmpty]: Start isEmpty. Operand 39850 states and 178603 transitions. [2022-03-01 17:54:27,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 17:54:27,951 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:27,951 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:27,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:28,152 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,SelfDestructingSolverStorable20 [2022-03-01 17:54:28,153 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:28,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:28,154 INFO L85 PathProgramCache]: Analyzing trace with hash 2078759021, now seen corresponding path program 13 times [2022-03-01 17:54:28,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:28,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139878502] [2022-03-01 17:54:28,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:28,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:54:28,197 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:28,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139878502] [2022-03-01 17:54:28,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139878502] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:28,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453497298] [2022-03-01 17:54:28,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:54:28,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:28,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:28,198 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) [2022-03-01 17:54:28,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 17:54:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:28,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:54:28,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:28,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:54:28,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453497298] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:28,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:28,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 11 [2022-03-01 17:54:28,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670264873] [2022-03-01 17:54:28,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:28,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:54:28,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:28,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:54:28,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:54:28,495 INFO L87 Difference]: Start difference. First operand 39850 states and 178603 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:29,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:29,428 INFO L93 Difference]: Finished difference Result 60941 states and 268418 transitions. [2022-03-01 17:54:29,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:54:29,428 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-01 17:54:29,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:29,714 INFO L225 Difference]: With dead ends: 60941 [2022-03-01 17:54:29,714 INFO L226 Difference]: Without dead ends: 60279 [2022-03-01 17:54:29,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:54:29,715 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 169 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:29,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 484 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:54:29,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60279 states. [2022-03-01 17:54:31,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60279 to 54948. [2022-03-01 17:54:31,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54948 states, 54947 states have (on average 4.507143247129052) internal successors, (247654), 54947 states have internal predecessors, (247654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:31,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54948 states to 54948 states and 247654 transitions. [2022-03-01 17:54:31,945 INFO L78 Accepts]: Start accepts. Automaton has 54948 states and 247654 transitions. Word has length 34 [2022-03-01 17:54:31,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:31,946 INFO L470 AbstractCegarLoop]: Abstraction has 54948 states and 247654 transitions. [2022-03-01 17:54:31,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:31,946 INFO L276 IsEmpty]: Start isEmpty. Operand 54948 states and 247654 transitions. [2022-03-01 17:54:32,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:54:32,092 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:32,092 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:32,293 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forcibly destroying the process [2022-03-01 17:54:32,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-01 17:54:32,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:32,295 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:32,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:32,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1621846571, now seen corresponding path program 14 times [2022-03-01 17:54:32,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:32,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418852257] [2022-03-01 17:54:32,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:32,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:32,363 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:32,364 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:32,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418852257] [2022-03-01 17:54:32,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418852257] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:32,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726206848] [2022-03-01 17:54:32,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:54:32,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:32,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:32,365 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) [2022-03-01 17:54:32,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 17:54:32,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:54:32,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:32,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:54:32,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:32,543 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:32,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:32,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:32,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726206848] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:32,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:32,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-03-01 17:54:32,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108190312] [2022-03-01 17:54:32,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:32,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:54:32,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:32,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:54:32,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:54:32,658 INFO L87 Difference]: Start difference. First operand 54948 states and 247654 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:34,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:34,353 INFO L93 Difference]: Finished difference Result 124006 states and 531222 transitions. [2022-03-01 17:54:34,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:54:34,353 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:54:34,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:35,163 INFO L225 Difference]: With dead ends: 124006 [2022-03-01 17:54:35,164 INFO L226 Difference]: Without dead ends: 124006 [2022-03-01 17:54:35,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=652, Invalid=1798, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 17:54:35,164 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 562 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:35,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 654 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:54:35,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124006 states. [2022-03-01 17:54:37,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124006 to 56994. [2022-03-01 17:54:37,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56994 states, 56993 states have (on average 4.487621286824698) internal successors, (255763), 56993 states have internal predecessors, (255763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:38,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56994 states to 56994 states and 255763 transitions. [2022-03-01 17:54:38,193 INFO L78 Accepts]: Start accepts. Automaton has 56994 states and 255763 transitions. Word has length 36 [2022-03-01 17:54:38,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:38,193 INFO L470 AbstractCegarLoop]: Abstraction has 56994 states and 255763 transitions. [2022-03-01 17:54:38,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:38,193 INFO L276 IsEmpty]: Start isEmpty. Operand 56994 states and 255763 transitions. [2022-03-01 17:54:38,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:54:38,567 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:38,567 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:38,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:38,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:38,772 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:38,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:38,772 INFO L85 PathProgramCache]: Analyzing trace with hash 2043305711, now seen corresponding path program 15 times [2022-03-01 17:54:38,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:38,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045278939] [2022-03-01 17:54:38,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:38,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:38,833 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:38,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045278939] [2022-03-01 17:54:38,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045278939] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:38,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655028819] [2022-03-01 17:54:38,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:54:38,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:38,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:38,835 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) [2022-03-01 17:54:38,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 17:54:38,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:54:38,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:38,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:54:38,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:39,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:39,115 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:39,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655028819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:39,116 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:39,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-01 17:54:39,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201786464] [2022-03-01 17:54:39,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:39,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:54:39,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:39,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:54:39,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:54:39,117 INFO L87 Difference]: Start difference. First operand 56994 states and 255763 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:41,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:41,135 INFO L93 Difference]: Finished difference Result 148781 states and 646238 transitions. [2022-03-01 17:54:41,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:54:41,136 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:54:41,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:42,146 INFO L225 Difference]: With dead ends: 148781 [2022-03-01 17:54:42,146 INFO L226 Difference]: Without dead ends: 147463 [2022-03-01 17:54:42,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=562, Invalid=1508, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:54:42,147 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 861 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:42,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 499 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:54:42,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147463 states. [2022-03-01 17:54:45,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147463 to 80557. [2022-03-01 17:54:45,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80557 states, 80556 states have (on average 4.52723571180297) internal successors, (364696), 80556 states have internal predecessors, (364696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:46,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80557 states to 80557 states and 364696 transitions. [2022-03-01 17:54:46,340 INFO L78 Accepts]: Start accepts. Automaton has 80557 states and 364696 transitions. Word has length 36 [2022-03-01 17:54:46,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:46,340 INFO L470 AbstractCegarLoop]: Abstraction has 80557 states and 364696 transitions. [2022-03-01 17:54:46,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:46,340 INFO L276 IsEmpty]: Start isEmpty. Operand 80557 states and 364696 transitions. [2022-03-01 17:54:46,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:54:46,934 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:46,934 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:46,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:47,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-01 17:54:47,135 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:47,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:47,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1708986033, now seen corresponding path program 16 times [2022-03-01 17:54:47,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:47,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741939990] [2022-03-01 17:54:47,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:47,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:47,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:47,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741939990] [2022-03-01 17:54:47,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741939990] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:47,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100575790] [2022-03-01 17:54:47,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:54:47,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:47,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:47,189 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) [2022-03-01 17:54:47,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 17:54:47,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:54:47,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:47,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:54:47,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:47,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:47,516 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:47,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100575790] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:47,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:47,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2022-03-01 17:54:47,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271136880] [2022-03-01 17:54:47,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:47,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:54:47,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:47,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:54:47,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:54:47,518 INFO L87 Difference]: Start difference. First operand 80557 states and 364696 transitions. Second operand has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 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) [2022-03-01 17:54:50,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:50,294 INFO L93 Difference]: Finished difference Result 185999 states and 812029 transitions. [2022-03-01 17:54:50,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 17:54:50,294 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 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) Word has length 36 [2022-03-01 17:54:50,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:51,689 INFO L225 Difference]: With dead ends: 185999 [2022-03-01 17:54:51,689 INFO L226 Difference]: Without dead ends: 185979 [2022-03-01 17:54:51,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=880, Invalid=2200, Unknown=0, NotChecked=0, Total=3080 [2022-03-01 17:54:51,694 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 744 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:51,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [744 Valid, 725 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:54:51,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185979 states. [2022-03-01 17:54:57,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185979 to 102149. [2022-03-01 17:54:57,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102149 states, 102148 states have (on average 4.5491933273289735) internal successors, (464691), 102148 states have internal predecessors, (464691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:58,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102149 states to 102149 states and 464691 transitions. [2022-03-01 17:54:58,419 INFO L78 Accepts]: Start accepts. Automaton has 102149 states and 464691 transitions. Word has length 36 [2022-03-01 17:54:58,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:58,419 INFO L470 AbstractCegarLoop]: Abstraction has 102149 states and 464691 transitions. [2022-03-01 17:54:58,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 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) [2022-03-01 17:54:58,420 INFO L276 IsEmpty]: Start isEmpty. Operand 102149 states and 464691 transitions. [2022-03-01 17:54:58,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:54:58,763 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:58,763 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:58,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-01 17:54:58,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:58,980 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:58,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:58,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1061083381, now seen corresponding path program 17 times [2022-03-01 17:54:58,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:58,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537806206] [2022-03-01 17:54:58,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:58,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:59,052 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:59,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537806206] [2022-03-01 17:54:59,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537806206] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:59,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717073175] [2022-03-01 17:54:59,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:54:59,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:59,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:59,059 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) [2022-03-01 17:54:59,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 17:54:59,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-01 17:54:59,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:59,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:54:59,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:59,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:59,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717073175] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:59,463 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:59,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-03-01 17:54:59,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739494170] [2022-03-01 17:54:59,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:59,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:54:59,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:59,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:54:59,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:54:59,465 INFO L87 Difference]: Start difference. First operand 102149 states and 464691 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:01,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:01,788 INFO L93 Difference]: Finished difference Result 140554 states and 618093 transitions. [2022-03-01 17:55:01,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:55:01,788 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:55:01,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:02,766 INFO L225 Difference]: With dead ends: 140554 [2022-03-01 17:55:02,766 INFO L226 Difference]: Without dead ends: 140250 [2022-03-01 17:55:02,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=539, Invalid=1267, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:55:02,767 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 442 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:02,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 389 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:55:03,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140250 states. [2022-03-01 17:55:06,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140250 to 98725. [2022-03-01 17:55:06,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98725 states, 98724 states have (on average 4.555366476236781) internal successors, (449724), 98724 states have internal predecessors, (449724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:07,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98725 states to 98725 states and 449724 transitions. [2022-03-01 17:55:07,678 INFO L78 Accepts]: Start accepts. Automaton has 98725 states and 449724 transitions. Word has length 36 [2022-03-01 17:55:07,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:07,678 INFO L470 AbstractCegarLoop]: Abstraction has 98725 states and 449724 transitions. [2022-03-01 17:55:07,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:07,679 INFO L276 IsEmpty]: Start isEmpty. Operand 98725 states and 449724 transitions. [2022-03-01 17:55:07,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:55:07,923 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:07,923 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:07,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-01 17:55:08,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:08,123 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:55:08,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:08,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1796828169, now seen corresponding path program 18 times [2022-03-01 17:55:08,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:08,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158561636] [2022-03-01 17:55:08,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:08,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:08,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:55:08,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:08,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158561636] [2022-03-01 17:55:08,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158561636] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:08,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577870854] [2022-03-01 17:55:08,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:55:08,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:08,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:08,173 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) [2022-03-01 17:55:08,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 17:55:08,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:55:08,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:08,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:55:08,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:08,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:08,478 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:08,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577870854] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:08,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:08,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-03-01 17:55:08,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92613572] [2022-03-01 17:55:08,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:08,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:55:08,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:08,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:55:08,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:55:08,479 INFO L87 Difference]: Start difference. First operand 98725 states and 449724 transitions. Second operand has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 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) [2022-03-01 17:55:10,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:10,517 INFO L93 Difference]: Finished difference Result 157433 states and 697584 transitions. [2022-03-01 17:55:10,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:55:10,518 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 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) Word has length 36 [2022-03-01 17:55:10,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:11,675 INFO L225 Difference]: With dead ends: 157433 [2022-03-01 17:55:11,675 INFO L226 Difference]: Without dead ends: 156538 [2022-03-01 17:55:11,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=1115, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:55:11,676 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 532 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:11,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 500 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:55:11,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156538 states. [2022-03-01 17:55:16,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156538 to 110101. [2022-03-01 17:55:16,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110101 states, 110100 states have (on average 4.5832970027247955) internal successors, (504621), 110100 states have internal predecessors, (504621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:17,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110101 states to 110101 states and 504621 transitions. [2022-03-01 17:55:17,063 INFO L78 Accepts]: Start accepts. Automaton has 110101 states and 504621 transitions. Word has length 36 [2022-03-01 17:55:17,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:17,064 INFO L470 AbstractCegarLoop]: Abstraction has 110101 states and 504621 transitions. [2022-03-01 17:55:17,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 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) [2022-03-01 17:55:17,064 INFO L276 IsEmpty]: Start isEmpty. Operand 110101 states and 504621 transitions. [2022-03-01 17:55:17,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:55:17,306 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:17,306 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:17,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:17,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:17,507 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:55:17,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:17,507 INFO L85 PathProgramCache]: Analyzing trace with hash 54084015, now seen corresponding path program 19 times [2022-03-01 17:55:17,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:17,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799689496] [2022-03-01 17:55:17,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:17,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:17,561 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:17,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799689496] [2022-03-01 17:55:17,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799689496] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:17,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772464810] [2022-03-01 17:55:17,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:55:17,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:17,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:17,562 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) [2022-03-01 17:55:17,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 17:55:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:17,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:55:17,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:17,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:17,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772464810] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:17,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:17,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:55:17,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679268103] [2022-03-01 17:55:17,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:17,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:55:17,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:17,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:55:17,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:55:17,904 INFO L87 Difference]: Start difference. First operand 110101 states and 504621 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:20,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:20,482 INFO L93 Difference]: Finished difference Result 192417 states and 850027 transitions. [2022-03-01 17:55:20,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:55:20,482 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:55:20,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:21,909 INFO L225 Difference]: With dead ends: 192417 [2022-03-01 17:55:21,910 INFO L226 Difference]: Without dead ends: 191725 [2022-03-01 17:55:21,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=593, Invalid=1477, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:55:21,910 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 682 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:21,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 456 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:55:22,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191725 states. [2022-03-01 17:55:27,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191725 to 118442. [2022-03-01 17:55:27,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118442 states, 118441 states have (on average 4.604208002296502) internal successors, (545327), 118441 states have internal predecessors, (545327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:28,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118442 states to 118442 states and 545327 transitions. [2022-03-01 17:55:28,795 INFO L78 Accepts]: Start accepts. Automaton has 118442 states and 545327 transitions. Word has length 36 [2022-03-01 17:55:28,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:28,795 INFO L470 AbstractCegarLoop]: Abstraction has 118442 states and 545327 transitions. [2022-03-01 17:55:28,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:28,796 INFO L276 IsEmpty]: Start isEmpty. Operand 118442 states and 545327 transitions. [2022-03-01 17:55:29,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:55:29,381 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:29,381 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:29,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:29,597 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,SelfDestructingSolverStorable27 [2022-03-01 17:55:29,597 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:55:29,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:29,598 INFO L85 PathProgramCache]: Analyzing trace with hash 40319953, now seen corresponding path program 20 times [2022-03-01 17:55:29,598 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:29,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854805289] [2022-03-01 17:55:29,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:29,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:29,695 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:55:29,696 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:29,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854805289] [2022-03-01 17:55:29,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854805289] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:29,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439361009] [2022-03-01 17:55:29,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:55:29,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:29,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:29,708 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) [2022-03-01 17:55:29,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 17:55:29,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:55:29,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:29,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:55:29,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:29,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:30,076 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:30,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439361009] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:30,076 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:30,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-01 17:55:30,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118292216] [2022-03-01 17:55:30,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:30,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:55:30,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:30,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:55:30,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:55:30,077 INFO L87 Difference]: Start difference. First operand 118442 states and 545327 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:33,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:33,305 INFO L93 Difference]: Finished difference Result 238278 states and 1037671 transitions. [2022-03-01 17:55:33,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 17:55:33,305 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:55:33,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:35,008 INFO L225 Difference]: With dead ends: 238278 [2022-03-01 17:55:35,008 INFO L226 Difference]: Without dead ends: 238278 [2022-03-01 17:55:35,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=815, Invalid=2047, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 17:55:35,009 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 677 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:35,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 686 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:55:35,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238278 states. [2022-03-01 17:55:41,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238278 to 115584. [2022-03-01 17:55:41,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115584 states, 115583 states have (on average 4.562331830805569) internal successors, (527328), 115583 states have internal predecessors, (527328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:42,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115584 states to 115584 states and 527328 transitions. [2022-03-01 17:55:42,372 INFO L78 Accepts]: Start accepts. Automaton has 115584 states and 527328 transitions. Word has length 36 [2022-03-01 17:55:42,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:42,372 INFO L470 AbstractCegarLoop]: Abstraction has 115584 states and 527328 transitions. [2022-03-01 17:55:42,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:42,372 INFO L276 IsEmpty]: Start isEmpty. Operand 115584 states and 527328 transitions. [2022-03-01 17:55:42,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:55:42,618 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:42,618 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:42,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:42,818 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,SelfDestructingSolverStorable28 [2022-03-01 17:55:42,818 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:55:42,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:42,819 INFO L85 PathProgramCache]: Analyzing trace with hash 554582417, now seen corresponding path program 21 times [2022-03-01 17:55:42,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:42,819 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126440278] [2022-03-01 17:55:42,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:42,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:55:42,874 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:42,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126440278] [2022-03-01 17:55:42,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126440278] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:42,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491640081] [2022-03-01 17:55:42,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:55:42,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:42,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:42,876 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) [2022-03-01 17:55:42,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 17:55:42,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:55:42,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:42,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:55:42,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:43,060 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:43,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:43,409 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:43,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491640081] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:43,409 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:43,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:55:43,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929265508] [2022-03-01 17:55:43,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:43,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:55:43,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:43,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:55:43,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:55:43,410 INFO L87 Difference]: Start difference. First operand 115584 states and 527328 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:45,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:45,142 INFO L93 Difference]: Finished difference Result 149434 states and 659887 transitions. [2022-03-01 17:55:45,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:55:45,143 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:55:45,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:46,194 INFO L225 Difference]: With dead ends: 149434 [2022-03-01 17:55:46,195 INFO L226 Difference]: Without dead ends: 149030 [2022-03-01 17:55:46,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=443, Invalid=1197, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:55:46,196 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 428 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:46,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 493 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:55:46,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149030 states. [2022-03-01 17:55:50,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149030 to 114434. [2022-03-01 17:55:50,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114434 states, 114433 states have (on average 4.564548687878497) internal successors, (522335), 114433 states have internal predecessors, (522335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:51,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114434 states to 114434 states and 522335 transitions. [2022-03-01 17:55:51,315 INFO L78 Accepts]: Start accepts. Automaton has 114434 states and 522335 transitions. Word has length 36 [2022-03-01 17:55:51,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:51,315 INFO L470 AbstractCegarLoop]: Abstraction has 114434 states and 522335 transitions. [2022-03-01 17:55:51,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:51,315 INFO L276 IsEmpty]: Start isEmpty. Operand 114434 states and 522335 transitions. [2022-03-01 17:55:51,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:55:51,571 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:51,571 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:51,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:51,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:51,775 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:55:51,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:51,776 INFO L85 PathProgramCache]: Analyzing trace with hash 13790191, now seen corresponding path program 22 times [2022-03-01 17:55:51,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:51,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500609787] [2022-03-01 17:55:51,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:51,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:55:51,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:51,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500609787] [2022-03-01 17:55:51,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500609787] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:51,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083186620] [2022-03-01 17:55:51,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:55:51,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:51,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:51,836 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) [2022-03-01 17:55:51,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 17:55:51,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:55:51,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:51,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:55:51,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:52,020 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:52,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:52,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083186620] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:52,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:52,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-01 17:55:52,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365529181] [2022-03-01 17:55:52,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:52,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:55:52,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:52,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:55:52,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:55:52,153 INFO L87 Difference]: Start difference. First operand 114434 states and 522335 transitions. Second operand has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 20 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:56,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:56,638 INFO L93 Difference]: Finished difference Result 286904 states and 1270849 transitions. [2022-03-01 17:55:56,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 17:55:56,638 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 20 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:55:56,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:59,059 INFO L225 Difference]: With dead ends: 286904 [2022-03-01 17:55:59,059 INFO L226 Difference]: Without dead ends: 286904 [2022-03-01 17:55:59,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1361 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1165, Invalid=2741, Unknown=0, NotChecked=0, Total=3906 [2022-03-01 17:55:59,060 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 929 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:59,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [929 Valid, 650 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:55:59,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286904 states. [2022-03-01 17:56:09,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286904 to 187390. [2022-03-01 17:56:09,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187390 states, 187389 states have (on average 4.617053295550966) internal successors, (865185), 187389 states have internal predecessors, (865185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:10,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187390 states to 187390 states and 865185 transitions. [2022-03-01 17:56:10,966 INFO L78 Accepts]: Start accepts. Automaton has 187390 states and 865185 transitions. Word has length 36 [2022-03-01 17:56:10,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:10,967 INFO L470 AbstractCegarLoop]: Abstraction has 187390 states and 865185 transitions. [2022-03-01 17:56:10,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 20 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:10,967 INFO L276 IsEmpty]: Start isEmpty. Operand 187390 states and 865185 transitions. [2022-03-01 17:56:11,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:56:11,333 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:11,333 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:11,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:11,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:11,539 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:11,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:11,540 INFO L85 PathProgramCache]: Analyzing trace with hash -766980923, now seen corresponding path program 23 times [2022-03-01 17:56:11,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:11,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234209694] [2022-03-01 17:56:11,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:11,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:11,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:56:11,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:11,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234209694] [2022-03-01 17:56:11,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234209694] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:11,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864376076] [2022-03-01 17:56:11,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:56:11,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:11,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:11,594 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) [2022-03-01 17:56:11,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 17:56:11,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:56:11,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:11,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:56:11,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:11,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:11,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864376076] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:11,939 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:11,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-03-01 17:56:11,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249412185] [2022-03-01 17:56:11,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:11,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:56:11,939 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:11,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:56:11,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:56:12,175 INFO L87 Difference]: Start difference. First operand 187390 states and 865185 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:15,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:15,503 INFO L93 Difference]: Finished difference Result 254683 states and 1137807 transitions. [2022-03-01 17:56:15,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:56:15,503 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:56:15,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:17,318 INFO L225 Difference]: With dead ends: 254683 [2022-03-01 17:56:17,318 INFO L226 Difference]: Without dead ends: 254373 [2022-03-01 17:56:17,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=724, Invalid=1726, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 17:56:17,319 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 642 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:17,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 511 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:56:17,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254373 states. [2022-03-01 17:56:25,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254373 to 187000. [2022-03-01 17:56:25,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187000 states, 186999 states have (on average 4.611853539323739) internal successors, (862412), 186999 states have internal predecessors, (862412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:26,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187000 states to 187000 states and 862412 transitions. [2022-03-01 17:56:26,989 INFO L78 Accepts]: Start accepts. Automaton has 187000 states and 862412 transitions. Word has length 36 [2022-03-01 17:56:26,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:26,989 INFO L470 AbstractCegarLoop]: Abstraction has 187000 states and 862412 transitions. [2022-03-01 17:56:26,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:26,989 INFO L276 IsEmpty]: Start isEmpty. Operand 187000 states and 862412 transitions. [2022-03-01 17:56:27,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:56:27,386 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:27,386 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:27,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:27,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:27,587 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:27,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:27,587 INFO L85 PathProgramCache]: Analyzing trace with hash 439890227, now seen corresponding path program 24 times [2022-03-01 17:56:27,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:27,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413404561] [2022-03-01 17:56:27,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:27,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:56:27,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:27,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413404561] [2022-03-01 17:56:27,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413404561] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:27,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093139949] [2022-03-01 17:56:27,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:56:27,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:27,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:27,645 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) [2022-03-01 17:56:27,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 17:56:27,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:56:27,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:27,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:56:27,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:27,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:27,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093139949] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:27,933 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:27,933 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:56:27,933 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150836298] [2022-03-01 17:56:27,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:27,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:56:27,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:27,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:56:27,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:56:27,934 INFO L87 Difference]: Start difference. First operand 187000 states and 862412 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:32,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:32,504 INFO L93 Difference]: Finished difference Result 283294 states and 1263502 transitions. [2022-03-01 17:56:32,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:56:32,507 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:56:32,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:34,903 INFO L225 Difference]: With dead ends: 283294 [2022-03-01 17:56:34,904 INFO L226 Difference]: Without dead ends: 282784 [2022-03-01 17:56:34,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=728, Invalid=1722, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 17:56:34,907 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 688 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:34,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 509 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:56:35,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282784 states. [2022-03-01 17:56:44,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282784 to 207055. [2022-03-01 17:56:44,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207055 states, 207054 states have (on average 4.6254455359471445) internal successors, (957717), 207054 states have internal predecessors, (957717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:46,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207055 states to 207055 states and 957717 transitions. [2022-03-01 17:56:46,137 INFO L78 Accepts]: Start accepts. Automaton has 207055 states and 957717 transitions. Word has length 36 [2022-03-01 17:56:46,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:46,137 INFO L470 AbstractCegarLoop]: Abstraction has 207055 states and 957717 transitions. [2022-03-01 17:56:46,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:46,137 INFO L276 IsEmpty]: Start isEmpty. Operand 207055 states and 957717 transitions. [2022-03-01 17:56:46,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:56:46,540 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:46,540 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:46,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:46,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-01 17:56:46,744 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:46,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:46,744 INFO L85 PathProgramCache]: Analyzing trace with hash -381009233, now seen corresponding path program 25 times [2022-03-01 17:56:46,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:46,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957191527] [2022-03-01 17:56:46,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:46,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:46,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:46,800 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:46,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957191527] [2022-03-01 17:56:46,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957191527] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:46,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147893924] [2022-03-01 17:56:46,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:56:46,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:46,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:46,802 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) [2022-03-01 17:56:46,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-01 17:56:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:46,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:56:46,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:47,248 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:47,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:47,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147893924] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:47,350 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:47,350 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-01 17:56:47,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847473176] [2022-03-01 17:56:47,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:47,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:56:47,350 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:47,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:56:47,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:56:47,351 INFO L87 Difference]: Start difference. First operand 207055 states and 957717 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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) [2022-03-01 17:56:50,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:50,977 INFO L93 Difference]: Finished difference Result 290122 states and 1295399 transitions. [2022-03-01 17:56:50,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:56:50,977 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:56:50,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:53,073 INFO L225 Difference]: With dead ends: 290122 [2022-03-01 17:56:53,073 INFO L226 Difference]: Without dead ends: 289652 [2022-03-01 17:56:53,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=737, Invalid=1813, Unknown=0, NotChecked=0, Total=2550 [2022-03-01 17:56:53,074 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 763 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:53,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [763 Valid, 624 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:56:53,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289652 states. [2022-03-01 17:57:02,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289652 to 218816. [2022-03-01 17:57:02,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218816 states, 218815 states have (on average 4.624737792198889) internal successors, (1011962), 218815 states have internal predecessors, (1011962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:05,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218816 states to 218816 states and 1011962 transitions. [2022-03-01 17:57:05,640 INFO L78 Accepts]: Start accepts. Automaton has 218816 states and 1011962 transitions. Word has length 36 [2022-03-01 17:57:05,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:05,640 INFO L470 AbstractCegarLoop]: Abstraction has 218816 states and 1011962 transitions. [2022-03-01 17:57:05,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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) [2022-03-01 17:57:05,640 INFO L276 IsEmpty]: Start isEmpty. Operand 218816 states and 1011962 transitions. [2022-03-01 17:57:06,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-01 17:57:06,651 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:06,651 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:06,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:06,863 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,SelfDestructingSolverStorable33 [2022-03-01 17:57:06,863 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:57:06,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:06,864 INFO L85 PathProgramCache]: Analyzing trace with hash 490568557, now seen corresponding path program 26 times [2022-03-01 17:57:06,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:06,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621901887] [2022-03-01 17:57:06,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:06,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:06,936 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:06,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621901887] [2022-03-01 17:57:06,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621901887] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:06,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327956683] [2022-03-01 17:57:06,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:57:06,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:06,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:06,950 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) [2022-03-01 17:57:06,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-01 17:57:06,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:57:06,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:06,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:57:06,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:07,242 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:07,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:07,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327956683] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:07,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:07,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 7] total 14 [2022-03-01 17:57:07,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999196550] [2022-03-01 17:57:07,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:07,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:57:07,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:07,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:57:07,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:57:07,407 INFO L87 Difference]: Start difference. First operand 218816 states and 1011962 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:11,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:11,398 INFO L93 Difference]: Finished difference Result 275767 states and 1260077 transitions. [2022-03-01 17:57:11,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:57:11,398 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-03-01 17:57:11,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:13,584 INFO L225 Difference]: With dead ends: 275767 [2022-03-01 17:57:13,584 INFO L226 Difference]: Without dead ends: 274998 [2022-03-01 17:57:13,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:57:13,585 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 240 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:13,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 772 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:57:14,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274998 states. [2022-03-01 17:57:23,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274998 to 238003. [2022-03-01 17:57:24,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238003 states, 238002 states have (on average 4.6232090486634565) internal successors, (1100333), 238002 states have internal predecessors, (1100333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:27,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238003 states to 238003 states and 1100333 transitions. [2022-03-01 17:57:27,275 INFO L78 Accepts]: Start accepts. Automaton has 238003 states and 1100333 transitions. Word has length 38 [2022-03-01 17:57:27,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:27,276 INFO L470 AbstractCegarLoop]: Abstraction has 238003 states and 1100333 transitions. [2022-03-01 17:57:27,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:27,276 INFO L276 IsEmpty]: Start isEmpty. Operand 238003 states and 1100333 transitions. [2022-03-01 17:57:28,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-01 17:57:28,445 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:28,445 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:28,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-01 17:57:28,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-01 17:57:28,661 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:57:28,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:28,661 INFO L85 PathProgramCache]: Analyzing trace with hash 2064971429, now seen corresponding path program 27 times [2022-03-01 17:57:28,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:28,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559188593] [2022-03-01 17:57:28,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:28,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:57:28,750 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:28,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559188593] [2022-03-01 17:57:28,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559188593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:28,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435901393] [2022-03-01 17:57:28,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:57:28,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:28,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:28,752 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) [2022-03-01 17:57:28,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-01 17:57:28,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:57:28,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:28,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:57:28,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:29,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:57:29,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435901393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:29,124 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:29,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 7] total 14 [2022-03-01 17:57:29,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277061553] [2022-03-01 17:57:29,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:29,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:57:29,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:29,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:57:29,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:57:29,125 INFO L87 Difference]: Start difference. First operand 238003 states and 1100333 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:34,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:34,182 INFO L93 Difference]: Finished difference Result 394201 states and 1792824 transitions. [2022-03-01 17:57:34,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:57:34,182 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-03-01 17:57:34,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:39,360 INFO L225 Difference]: With dead ends: 394201 [2022-03-01 17:57:39,360 INFO L226 Difference]: Without dead ends: 392734 [2022-03-01 17:57:39,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:57:39,361 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 255 mSDsluCounter, 1131 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:39,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 884 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:57:40,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392734 states. [2022-03-01 17:57:54,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392734 to 306278. [2022-03-01 17:57:55,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306278 states, 306277 states have (on average 4.624082121739471) internal successors, (1416250), 306277 states have internal predecessors, (1416250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:58,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306278 states to 306278 states and 1416250 transitions. [2022-03-01 17:57:58,291 INFO L78 Accepts]: Start accepts. Automaton has 306278 states and 1416250 transitions. Word has length 38 [2022-03-01 17:57:58,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:58,292 INFO L470 AbstractCegarLoop]: Abstraction has 306278 states and 1416250 transitions. [2022-03-01 17:57:58,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:58,292 INFO L276 IsEmpty]: Start isEmpty. Operand 306278 states and 1416250 transitions. [2022-03-01 17:57:59,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-01 17:57:59,273 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:59,273 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:59,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-01 17:57:59,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:59,474 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:57:59,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:59,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1139005671, now seen corresponding path program 1 times [2022-03-01 17:57:59,474 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:59,474 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978908187] [2022-03-01 17:57:59,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:59,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:59,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:57:59,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:59,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978908187] [2022-03-01 17:57:59,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978908187] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:59,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048082739] [2022-03-01 17:57:59,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:59,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:59,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:59,541 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) [2022-03-01 17:57:59,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-01 17:57:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:59,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 17:57:59,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:59,751 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:59,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:59,918 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:57:59,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048082739] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:59,918 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:59,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 17 [2022-03-01 17:57:59,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838012140] [2022-03-01 17:57:59,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:59,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:57:59,919 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:59,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:57:59,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:57:59,919 INFO L87 Difference]: Start difference. First operand 306278 states and 1416250 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:08,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:08,824 INFO L93 Difference]: Finished difference Result 586179 states and 2672233 transitions. [2022-03-01 17:58:08,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:58:08,824 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-03-01 17:58:08,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:13,700 INFO L225 Difference]: With dead ends: 586179 [2022-03-01 17:58:13,700 INFO L226 Difference]: Without dead ends: 583951 [2022-03-01 17:58:13,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:58:13,701 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 284 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:13,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 928 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:58:14,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583951 states. [2022-03-01 17:58:37,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583951 to 425975. [2022-03-01 17:58:39,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425975 states, 425974 states have (on average 4.631465770211327) internal successors, (1972884), 425974 states have internal predecessors, (1972884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)