/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/counter-determinism.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.abstract-por-f0ea240 [2022-02-11 00:47:23,852 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-11 00:47:23,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-11 00:47:23,909 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-11 00:47:23,938 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 [2022-02-11 00:47:23,953 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-11 00:47:23,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-11 00:47:23,953 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-11 00:47:23,954 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-11 00:47:23,954 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-11 00:47:23,954 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-11 00:47:23,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-11 00:47:23,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-11 00:47:23,955 INFO L138 SettingsManager]: * Use SBE=true [2022-02-11 00:47:23,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-11 00:47:23,955 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-11 00:47:23,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-11 00:47:23,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-11 00:47:23,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-11 00:47:23,955 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-11 00:47:23,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-11 00:47:23,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-11 00:47:23,955 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-11 00:47:23,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-11 00:47:23,956 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-11 00:47:23,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-11 00:47:23,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-11 00:47:23,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-11 00:47:23,956 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-11 00:47:23,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-11 00:47:23,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 00:47:23,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-11 00:47:23,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-11 00:47:23,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-11 00:47:23,956 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-11 00:47:23,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-11 00:47:23,957 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-11 00:47:23,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-11 00:47:23,957 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-11 00:47:24,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-11 00:47:24,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-11 00:47:24,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-11 00:47:24,146 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-11 00:47:24,149 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-11 00:47:24,151 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl [2022-02-11 00:47:24,151 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl' [2022-02-11 00:47:24,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-11 00:47:24,190 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-11 00:47:24,192 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-11 00:47:24,192 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-11 00:47:24,192 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-11 00:47:24,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:47:24" (1/1) ... [2022-02-11 00:47:24,208 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:47:24" (1/1) ... [2022-02-11 00:47:24,214 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-11 00:47:24,216 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-11 00:47:24,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-11 00:47:24,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-11 00:47:24,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-11 00:47:24,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:47:24" (1/1) ... [2022-02-11 00:47:24,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:47:24" (1/1) ... [2022-02-11 00:47:24,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:47:24" (1/1) ... [2022-02-11 00:47:24,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:47:24" (1/1) ... [2022-02-11 00:47:24,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:47:24" (1/1) ... [2022-02-11 00:47:24,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:47:24" (1/1) ... [2022-02-11 00:47:24,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:47:24" (1/1) ... [2022-02-11 00:47:24,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-11 00:47:24,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-11 00:47:24,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-11 00:47:24,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-11 00:47:24,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:47:24" (1/1) ... [2022-02-11 00:47:24,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 00:47:24,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:24,278 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) [2022-02-11 00:47:24,290 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 [2022-02-11 00:47:24,319 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-11 00:47:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-11 00:47:24,320 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-11 00:47:24,320 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-11 00:47:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-11 00:47:24,320 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-11 00:47:24,320 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-11 00:47:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-11 00:47:24,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-11 00:47:24,320 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-11 00:47:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-11 00:47:24,321 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-11 00:47:24,321 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-02-11 00:47:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-02-11 00:47:24,322 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-02-11 00:47:24,323 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-11 00:47:24,355 INFO L234 CfgBuilder]: Building ICFG [2022-02-11 00:47:24,356 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-11 00:47:24,431 INFO L275 CfgBuilder]: Performing block encoding [2022-02-11 00:47:24,447 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-11 00:47:24,453 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-11 00:47:24,455 INFO L202 PluginConnector]: Adding new model counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 12:47:24 BoogieIcfgContainer [2022-02-11 00:47:24,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-11 00:47:24,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-11 00:47:24,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-11 00:47:24,484 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-11 00:47:24,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:47:24" (1/2) ... [2022-02-11 00:47:24,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162e6377 and model type counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.02 12:47:24, skipping insertion in model container [2022-02-11 00:47:24,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 12:47:24" (2/2) ... [2022-02-11 00:47:24,487 INFO L112 eAbstractionObserver]: Analyzing ICFG counter-determinism.wvr.bpl [2022-02-11 00:47:24,491 WARN L154 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-11 00:47:24,491 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-11 00:47:24,491 INFO L168 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-11 00:47:24,491 INFO L538 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-11 00:47:24,536 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-02-11 00:47:24,578 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-11 00:47:24,584 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-11 00:47:24,584 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-02-11 00:47:24,591 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 39 transitions, 110 flow [2022-02-11 00:47:24,656 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 435 states, 434 states have (on average 3.8225806451612905) internal successors, (1659), 434 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:24,660 INFO L276 IsEmpty]: Start isEmpty. Operand has 435 states, 434 states have (on average 3.8225806451612905) internal successors, (1659), 434 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:24,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 00:47:24,676 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:24,676 INFO L515 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] [2022-02-11 00:47:24,677 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 00:47:24,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:24,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1717712671, now seen corresponding path program 1 times [2022-02-11 00:47:24,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:24,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201118640] [2022-02-11 00:47:24,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:24,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:24,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:24,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201118640] [2022-02-11 00:47:24,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201118640] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:47:24,880 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:47:24,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 00:47:24,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332041466] [2022-02-11 00:47:24,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:47:24,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 00:47:24,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:24,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 00:47:24,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:47:24,905 INFO L87 Difference]: Start difference. First operand has 435 states, 434 states have (on average 3.8225806451612905) internal successors, (1659), 434 states have internal predecessors, (1659), 0 states have call successors, (0), 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 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:25,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:25,008 INFO L93 Difference]: Finished difference Result 1267 states and 4622 transitions. [2022-02-11 00:47:25,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 00:47:25,011 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-11 00:47:25,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:25,059 INFO L225 Difference]: With dead ends: 1267 [2022-02-11 00:47:25,060 INFO L226 Difference]: Without dead ends: 1056 [2022-02-11 00:47:25,061 INFO L933 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 [2022-02-11 00:47:25,064 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:25,064 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 58 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:47:25,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-02-11 00:47:25,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 775. [2022-02-11 00:47:25,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.7751937984496124) internal successors, (2922), 774 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:25,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2922 transitions. [2022-02-11 00:47:25,155 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2922 transitions. Word has length 25 [2022-02-11 00:47:25,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:25,156 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2922 transitions. [2022-02-11 00:47:25,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:25,156 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2922 transitions. [2022-02-11 00:47:25,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:47:25,161 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:25,161 INFO L515 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] [2022-02-11 00:47:25,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-11 00:47:25,162 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 00:47:25,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:25,164 INFO L85 PathProgramCache]: Analyzing trace with hash -389763933, now seen corresponding path program 1 times [2022-02-11 00:47:25,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:25,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542578369] [2022-02-11 00:47:25,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:25,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:25,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:25,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:25,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542578369] [2022-02-11 00:47:25,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542578369] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:47:25,246 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:47:25,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-11 00:47:25,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150425775] [2022-02-11 00:47:25,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:47:25,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:47:25,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:25,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:47:25,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:47:25,248 INFO L87 Difference]: Start difference. First operand 775 states and 2922 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:25,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:25,436 INFO L93 Difference]: Finished difference Result 1405 states and 5168 transitions. [2022-02-11 00:47:25,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:47:25,437 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:47:25,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:25,445 INFO L225 Difference]: With dead ends: 1405 [2022-02-11 00:47:25,445 INFO L226 Difference]: Without dead ends: 1369 [2022-02-11 00:47:25,447 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:47:25,451 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 97 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:25,452 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 73 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:47:25,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2022-02-11 00:47:25,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 903. [2022-02-11 00:47:25,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 3.8104212860310422) internal successors, (3437), 902 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 3437 transitions. [2022-02-11 00:47:25,491 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 3437 transitions. Word has length 27 [2022-02-11 00:47:25,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:25,492 INFO L470 AbstractCegarLoop]: Abstraction has 903 states and 3437 transitions. [2022-02-11 00:47:25,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:25,492 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 3437 transitions. [2022-02-11 00:47:25,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:47:25,495 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:25,495 INFO L515 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] [2022-02-11 00:47:25,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-11 00:47:25,495 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 00:47:25,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:25,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1011514275, now seen corresponding path program 1 times [2022-02-11 00:47:25,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:25,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679641557] [2022-02-11 00:47:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:25,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:25,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:25,600 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:25,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679641557] [2022-02-11 00:47:25,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679641557] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:47:25,601 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:47:25,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-11 00:47:25,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355379747] [2022-02-11 00:47:25,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:47:25,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:47:25,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:25,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:47:25,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:47:25,602 INFO L87 Difference]: Start difference. First operand 903 states and 3437 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:25,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:25,737 INFO L93 Difference]: Finished difference Result 1359 states and 4974 transitions. [2022-02-11 00:47:25,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:47:25,737 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:47:25,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:25,745 INFO L225 Difference]: With dead ends: 1359 [2022-02-11 00:47:25,745 INFO L226 Difference]: Without dead ends: 1327 [2022-02-11 00:47:25,746 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-02-11 00:47:25,751 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 155 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:25,752 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 63 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:47:25,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2022-02-11 00:47:25,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 931. [2022-02-11 00:47:25,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.7838709677419353) internal successors, (3519), 930 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:25,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3519 transitions. [2022-02-11 00:47:25,776 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3519 transitions. Word has length 27 [2022-02-11 00:47:25,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:25,776 INFO L470 AbstractCegarLoop]: Abstraction has 931 states and 3519 transitions. [2022-02-11 00:47:25,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:25,777 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3519 transitions. [2022-02-11 00:47:25,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:47:25,780 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:25,780 INFO L515 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] [2022-02-11 00:47:25,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-11 00:47:25,781 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 00:47:25,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:25,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2122504637, now seen corresponding path program 2 times [2022-02-11 00:47:25,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:25,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332980331] [2022-02-11 00:47:25,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:25,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:25,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:25,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:25,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332980331] [2022-02-11 00:47:25,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332980331] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:47:25,843 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:47:25,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-11 00:47:25,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786762640] [2022-02-11 00:47:25,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:47:25,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:47:25,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:25,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:47:25,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:47:25,844 INFO L87 Difference]: Start difference. First operand 931 states and 3519 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:25,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:25,949 INFO L93 Difference]: Finished difference Result 1126 states and 4123 transitions. [2022-02-11 00:47:25,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 00:47:25,949 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:47:25,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:25,955 INFO L225 Difference]: With dead ends: 1126 [2022-02-11 00:47:25,955 INFO L226 Difference]: Without dead ends: 1044 [2022-02-11 00:47:25,955 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:47:25,959 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:25,960 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 62 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:47:25,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-02-11 00:47:25,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 845. [2022-02-11 00:47:25,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.7831753554502368) internal successors, (3193), 844 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:25,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 3193 transitions. [2022-02-11 00:47:25,980 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 3193 transitions. Word has length 27 [2022-02-11 00:47:25,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:25,980 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 3193 transitions. [2022-02-11 00:47:25,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:25,981 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 3193 transitions. [2022-02-11 00:47:25,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:47:25,983 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:25,983 INFO L515 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] [2022-02-11 00:47:25,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-11 00:47:25,983 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 00:47:25,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:25,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1405271609, now seen corresponding path program 2 times [2022-02-11 00:47:25,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:25,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772901003] [2022-02-11 00:47:25,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:25,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:26,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:26,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772901003] [2022-02-11 00:47:26,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772901003] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:47:26,019 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:47:26,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 00:47:26,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494658797] [2022-02-11 00:47:26,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:47:26,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:47:26,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:26,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:47:26,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:47:26,020 INFO L87 Difference]: Start difference. First operand 845 states and 3193 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:26,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:26,078 INFO L93 Difference]: Finished difference Result 1296 states and 4868 transitions. [2022-02-11 00:47:26,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 00:47:26,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:47:26,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:26,084 INFO L225 Difference]: With dead ends: 1296 [2022-02-11 00:47:26,085 INFO L226 Difference]: Without dead ends: 1276 [2022-02-11 00:47:26,085 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:47:26,085 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 103 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:26,086 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 54 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:47:26,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2022-02-11 00:47:26,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 897. [2022-02-11 00:47:26,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.8359375) internal successors, (3437), 896 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:26,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3437 transitions. [2022-02-11 00:47:26,110 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3437 transitions. Word has length 27 [2022-02-11 00:47:26,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:26,110 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 3437 transitions. [2022-02-11 00:47:26,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:26,110 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3437 transitions. [2022-02-11 00:47:26,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:47:26,113 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:26,113 INFO L515 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] [2022-02-11 00:47:26,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-11 00:47:26,113 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 00:47:26,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:26,113 INFO L85 PathProgramCache]: Analyzing trace with hash 909052359, now seen corresponding path program 3 times [2022-02-11 00:47:26,114 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:26,114 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768431028] [2022-02-11 00:47:26,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:26,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:26,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:26,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:26,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768431028] [2022-02-11 00:47:26,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768431028] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:47:26,151 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:47:26,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:47:26,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032420098] [2022-02-11 00:47:26,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:47:26,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:47:26,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:26,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:47:26,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:47:26,152 INFO L87 Difference]: Start difference. First operand 897 states and 3437 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:26,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:26,258 INFO L93 Difference]: Finished difference Result 1772 states and 6736 transitions. [2022-02-11 00:47:26,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 00:47:26,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:47:26,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:26,267 INFO L225 Difference]: With dead ends: 1772 [2022-02-11 00:47:26,267 INFO L226 Difference]: Without dead ends: 1752 [2022-02-11 00:47:26,267 INFO L933 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 [2022-02-11 00:47:26,268 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 109 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:26,268 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 61 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:47:26,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2022-02-11 00:47:26,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1021. [2022-02-11 00:47:26,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 3.9323529411764704) internal successors, (4011), 1020 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:26,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 4011 transitions. [2022-02-11 00:47:26,298 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 4011 transitions. Word has length 27 [2022-02-11 00:47:26,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:26,298 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 4011 transitions. [2022-02-11 00:47:26,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:26,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 4011 transitions. [2022-02-11 00:47:26,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 00:47:26,301 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:26,301 INFO L515 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] [2022-02-11 00:47:26,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-11 00:47:26,301 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 00:47:26,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:26,301 INFO L85 PathProgramCache]: Analyzing trace with hash -669560377, now seen corresponding path program 4 times [2022-02-11 00:47:26,302 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:26,302 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998822885] [2022-02-11 00:47:26,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:26,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:26,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:26,342 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:26,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998822885] [2022-02-11 00:47:26,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998822885] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:47:26,343 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:47:26,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:47:26,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054868774] [2022-02-11 00:47:26,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:47:26,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:47:26,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:26,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:47:26,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:47:26,344 INFO L87 Difference]: Start difference. First operand 1021 states and 4011 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:26,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:26,408 INFO L93 Difference]: Finished difference Result 1137 states and 4479 transitions. [2022-02-11 00:47:26,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 00:47:26,408 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 00:47:26,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:26,414 INFO L225 Difference]: With dead ends: 1137 [2022-02-11 00:47:26,414 INFO L226 Difference]: Without dead ends: 1137 [2022-02-11 00:47:26,415 INFO L933 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 [2022-02-11 00:47:26,415 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 101 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:26,415 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 40 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:47:26,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-02-11 00:47:26,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 929. [2022-02-11 00:47:26,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 3.9364224137931036) internal successors, (3653), 928 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:26,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 3653 transitions. [2022-02-11 00:47:26,458 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 3653 transitions. Word has length 27 [2022-02-11 00:47:26,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:26,458 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 3653 transitions. [2022-02-11 00:47:26,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:26,458 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 3653 transitions. [2022-02-11 00:47:26,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:47:26,461 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:26,462 INFO L515 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] [2022-02-11 00:47:26,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-11 00:47:26,462 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 00:47:26,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:26,463 INFO L85 PathProgramCache]: Analyzing trace with hash 167752897, now seen corresponding path program 1 times [2022-02-11 00:47:26,463 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:26,463 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722323284] [2022-02-11 00:47:26,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:26,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:26,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:26,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722323284] [2022-02-11 00:47:26,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722323284] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:26,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819866574] [2022-02-11 00:47:26,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:26,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:26,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:26,522 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) [2022-02-11 00:47:26,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-11 00:47:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:26,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 00:47:26,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:26,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:26,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:26,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819866574] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:26,833 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-02-11 00:47:26,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 11 [2022-02-11 00:47:26,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129785969] [2022-02-11 00:47:26,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:47:26,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:47:26,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:26,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:47:26,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:47:26,834 INFO L87 Difference]: Start difference. First operand 929 states and 3653 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:26,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:26,927 INFO L93 Difference]: Finished difference Result 1587 states and 5894 transitions. [2022-02-11 00:47:26,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:47:26,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:47:26,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:26,935 INFO L225 Difference]: With dead ends: 1587 [2022-02-11 00:47:26,936 INFO L226 Difference]: Without dead ends: 1587 [2022-02-11 00:47:26,936 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:47:26,936 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 151 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:26,936 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 53 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:47:26,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2022-02-11 00:47:26,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1027. [2022-02-11 00:47:26,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 3.8703703703703702) internal successors, (3971), 1026 states have internal predecessors, (3971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:26,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 3971 transitions. [2022-02-11 00:47:26,966 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 3971 transitions. Word has length 29 [2022-02-11 00:47:26,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:26,966 INFO L470 AbstractCegarLoop]: Abstraction has 1027 states and 3971 transitions. [2022-02-11 00:47:26,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:26,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 3971 transitions. [2022-02-11 00:47:26,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:47:26,969 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:26,969 INFO L515 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] [2022-02-11 00:47:26,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:27,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:27,184 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 00:47:27,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:27,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1812385345, now seen corresponding path program 2 times [2022-02-11 00:47:27,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:27,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374091416] [2022-02-11 00:47:27,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:27,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:47:27,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:27,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374091416] [2022-02-11 00:47:27,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374091416] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:47:27,204 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:47:27,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 00:47:27,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141588869] [2022-02-11 00:47:27,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:47:27,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:47:27,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:27,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:47:27,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:47:27,204 INFO L87 Difference]: Start difference. First operand 1027 states and 3971 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:27,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:27,299 INFO L93 Difference]: Finished difference Result 1113 states and 4299 transitions. [2022-02-11 00:47:27,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 00:47:27,300 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:47:27,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:27,305 INFO L225 Difference]: With dead ends: 1113 [2022-02-11 00:47:27,305 INFO L226 Difference]: Without dead ends: 1113 [2022-02-11 00:47:27,305 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:47:27,307 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 85 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:27,308 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 54 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:47:27,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-02-11 00:47:27,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 955. [2022-02-11 00:47:27,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 3.846960167714885) internal successors, (3670), 954 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:27,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3670 transitions. [2022-02-11 00:47:27,332 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3670 transitions. Word has length 29 [2022-02-11 00:47:27,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:27,333 INFO L470 AbstractCegarLoop]: Abstraction has 955 states and 3670 transitions. [2022-02-11 00:47:27,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:27,333 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3670 transitions. [2022-02-11 00:47:27,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-11 00:47:27,336 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:27,337 INFO L515 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] [2022-02-11 00:47:27,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-11 00:47:27,337 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 00:47:27,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:27,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1458704197, now seen corresponding path program 1 times [2022-02-11 00:47:27,337 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:27,337 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962160303] [2022-02-11 00:47:27,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:27,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:27,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:47:27,376 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:27,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962160303] [2022-02-11 00:47:27,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962160303] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:27,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520921512] [2022-02-11 00:47:27,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:27,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:27,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:27,377 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) [2022-02-11 00:47:27,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-11 00:47:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:27,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-11 00:47:27,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:47:27,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:47:27,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520921512] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:27,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:27,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-02-11 00:47:27,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245351815] [2022-02-11 00:47:27,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:27,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:47:27,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:27,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:47:27,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:47:27,600 INFO L87 Difference]: Start difference. First operand 955 states and 3670 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:27,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:27,732 INFO L93 Difference]: Finished difference Result 1404 states and 5202 transitions. [2022-02-11 00:47:27,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:47:27,732 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-02-11 00:47:27,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:27,743 INFO L225 Difference]: With dead ends: 1404 [2022-02-11 00:47:27,743 INFO L226 Difference]: Without dead ends: 1404 [2022-02-11 00:47:27,744 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:47:27,744 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 79 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:27,744 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 110 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:47:27,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-02-11 00:47:27,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1036. [2022-02-11 00:47:27,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 3.7980676328502416) internal successors, (3931), 1035 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:27,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3931 transitions. [2022-02-11 00:47:27,767 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3931 transitions. Word has length 31 [2022-02-11 00:47:27,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:27,767 INFO L470 AbstractCegarLoop]: Abstraction has 1036 states and 3931 transitions. [2022-02-11 00:47:27,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:27,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3931 transitions. [2022-02-11 00:47:27,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-11 00:47:27,770 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:27,770 INFO L515 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] [2022-02-11 00:47:27,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:27,997 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,SelfDestructingSolverStorable9 [2022-02-11 00:47:27,997 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 00:47:27,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:27,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1797271549, now seen corresponding path program 2 times [2022-02-11 00:47:27,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:27,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444844790] [2022-02-11 00:47:27,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:27,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:47:28,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:28,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444844790] [2022-02-11 00:47:28,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444844790] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:28,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469900020] [2022-02-11 00:47:28,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:47:28,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:28,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:28,044 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) [2022-02-11 00:47:28,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-11 00:47:28,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:47:28,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:28,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-11 00:47:28,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:47:28,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-11 00:47:28,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469900020] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:47:28,151 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-11 00:47:28,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-02-11 00:47:28,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381758579] [2022-02-11 00:47:28,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:47:28,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:47:28,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:28,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:47:28,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:47:28,152 INFO L87 Difference]: Start difference. First operand 1036 states and 3931 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:28,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:28,190 INFO L93 Difference]: Finished difference Result 1123 states and 4234 transitions. [2022-02-11 00:47:28,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:47:28,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-02-11 00:47:28,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:28,208 INFO L225 Difference]: With dead ends: 1123 [2022-02-11 00:47:28,208 INFO L226 Difference]: Without dead ends: 1063 [2022-02-11 00:47:28,209 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:47:28,209 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 65 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:28,209 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 49 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:47:28,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2022-02-11 00:47:28,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 916. [2022-02-11 00:47:28,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.814207650273224) internal successors, (3490), 915 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:28,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3490 transitions. [2022-02-11 00:47:28,226 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3490 transitions. Word has length 31 [2022-02-11 00:47:28,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:28,227 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 3490 transitions. [2022-02-11 00:47:28,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:28,227 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3490 transitions. [2022-02-11 00:47:28,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-11 00:47:28,229 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:28,229 INFO L515 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, 1] [2022-02-11 00:47:28,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:28,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:28,447 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 00:47:28,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:28,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1732934325, now seen corresponding path program 1 times [2022-02-11 00:47:28,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:28,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653220541] [2022-02-11 00:47:28,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:28,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:28,496 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:28,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653220541] [2022-02-11 00:47:28,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653220541] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:28,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210669526] [2022-02-11 00:47:28,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:28,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:28,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:28,498 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) [2022-02-11 00:47:28,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-11 00:47:28,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:28,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-11 00:47:28,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:28,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:47:28,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:47:28,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210669526] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:28,837 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:28,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2022-02-11 00:47:28,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397488424] [2022-02-11 00:47:28,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:28,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 00:47:28,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:28,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 00:47:28,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-02-11 00:47:28,840 INFO L87 Difference]: Start difference. First operand 916 states and 3490 transitions. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 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) [2022-02-11 00:47:29,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:29,008 INFO L93 Difference]: Finished difference Result 4899 states and 18451 transitions. [2022-02-11 00:47:29,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:47:29,008 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 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 33 [2022-02-11 00:47:29,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:29,024 INFO L225 Difference]: With dead ends: 4899 [2022-02-11 00:47:29,025 INFO L226 Difference]: Without dead ends: 4461 [2022-02-11 00:47:29,025 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-02-11 00:47:29,026 INFO L934 BasicCegarLoop]: 56 mSDtfsCounter, 226 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:29,026 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 427 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:47:29,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4461 states. [2022-02-11 00:47:29,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4461 to 3248. [2022-02-11 00:47:29,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 3247 states have (on average 4.041576840160148) internal successors, (13123), 3247 states have internal predecessors, (13123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:29,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 13123 transitions. [2022-02-11 00:47:29,146 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 13123 transitions. Word has length 33 [2022-02-11 00:47:29,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:29,146 INFO L470 AbstractCegarLoop]: Abstraction has 3248 states and 13123 transitions. [2022-02-11 00:47:29,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 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) [2022-02-11 00:47:29,146 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 13123 transitions. [2022-02-11 00:47:29,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 00:47:29,155 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:29,155 INFO L515 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, 1, 1, 1] [2022-02-11 00:47:29,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:29,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:29,371 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 00:47:29,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:29,372 INFO L85 PathProgramCache]: Analyzing trace with hash -460853709, now seen corresponding path program 2 times [2022-02-11 00:47:29,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:29,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789009185] [2022-02-11 00:47:29,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:29,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:29,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:47:29,427 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:29,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789009185] [2022-02-11 00:47:29,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789009185] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:29,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330310709] [2022-02-11 00:47:29,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:47:29,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:29,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:29,428 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) [2022-02-11 00:47:29,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-11 00:47:29,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:47:29,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:29,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:47:29,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:29,604 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:47:29,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:29,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:47:29,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330310709] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:29,733 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:29,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 00:47:29,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746824757] [2022-02-11 00:47:29,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:29,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:47:29,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:29,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:47:29,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:47:29,734 INFO L87 Difference]: Start difference. First operand 3248 states and 13123 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:30,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:30,293 INFO L93 Difference]: Finished difference Result 11964 states and 47490 transitions. [2022-02-11 00:47:30,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:47:30,293 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 00:47:30,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:30,337 INFO L225 Difference]: With dead ends: 11964 [2022-02-11 00:47:30,337 INFO L226 Difference]: Without dead ends: 11922 [2022-02-11 00:47:30,337 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:47:30,338 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 409 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:30,338 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 223 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:47:30,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11922 states. [2022-02-11 00:47:30,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11922 to 4644. [2022-02-11 00:47:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4644 states, 4643 states have (on average 4.164548783114365) internal successors, (19336), 4643 states have internal predecessors, (19336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:30,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4644 states to 4644 states and 19336 transitions. [2022-02-11 00:47:30,561 INFO L78 Accepts]: Start accepts. Automaton has 4644 states and 19336 transitions. Word has length 35 [2022-02-11 00:47:30,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:30,561 INFO L470 AbstractCegarLoop]: Abstraction has 4644 states and 19336 transitions. [2022-02-11 00:47:30,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:30,561 INFO L276 IsEmpty]: Start isEmpty. Operand 4644 states and 19336 transitions. [2022-02-11 00:47:30,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 00:47:30,570 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:30,571 INFO L515 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, 1, 1, 1] [2022-02-11 00:47:30,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:30,771 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,SelfDestructingSolverStorable12 [2022-02-11 00:47:30,771 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 00:47:30,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:30,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1368524919, now seen corresponding path program 3 times [2022-02-11 00:47:30,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:30,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548670349] [2022-02-11 00:47:30,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:30,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:30,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:30,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:47:30,850 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:30,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548670349] [2022-02-11 00:47:30,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548670349] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:30,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475803020] [2022-02-11 00:47:30,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:47:30,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:30,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:30,852 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) [2022-02-11 00:47:30,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-11 00:47:30,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:47:30,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:30,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:47:30,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:47:31,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:31,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:47:31,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475803020] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:31,181 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:31,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-02-11 00:47:31,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846614271] [2022-02-11 00:47:31,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:31,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:47:31,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:31,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:47:31,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:47:31,182 INFO L87 Difference]: Start difference. First operand 4644 states and 19336 transitions. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 15 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:32,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:32,069 INFO L93 Difference]: Finished difference Result 26150 states and 109813 transitions. [2022-02-11 00:47:32,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 00:47:32,070 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 15 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 00:47:32,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:32,328 INFO L225 Difference]: With dead ends: 26150 [2022-02-11 00:47:32,329 INFO L226 Difference]: Without dead ends: 25754 [2022-02-11 00:47:32,329 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=627, Invalid=1725, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 00:47:32,329 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 1022 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:32,330 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 128 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:47:32,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25754 states. [2022-02-11 00:47:32,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25754 to 12160. [2022-02-11 00:47:32,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12160 states, 12159 states have (on average 4.609260629986019) internal successors, (56044), 12159 states have internal predecessors, (56044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:32,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12160 states to 12160 states and 56044 transitions. [2022-02-11 00:47:32,937 INFO L78 Accepts]: Start accepts. Automaton has 12160 states and 56044 transitions. Word has length 35 [2022-02-11 00:47:32,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:32,937 INFO L470 AbstractCegarLoop]: Abstraction has 12160 states and 56044 transitions. [2022-02-11 00:47:32,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 15 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:32,937 INFO L276 IsEmpty]: Start isEmpty. Operand 12160 states and 56044 transitions. [2022-02-11 00:47:32,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 00:47:32,969 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:32,969 INFO L515 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, 1, 1, 1] [2022-02-11 00:47:32,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:33,186 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 [2022-02-11 00:47:33,186 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 00:47:33,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:33,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1030007943, now seen corresponding path program 4 times [2022-02-11 00:47:33,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:33,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689750074] [2022-02-11 00:47:33,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:33,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:47:33,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:33,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689750074] [2022-02-11 00:47:33,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689750074] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:47:33,270 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:47:33,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 00:47:33,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601376523] [2022-02-11 00:47:33,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:47:33,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 00:47:33,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:33,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 00:47:33,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:47:33,271 INFO L87 Difference]: Start difference. First operand 12160 states and 56044 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:33,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:33,459 INFO L93 Difference]: Finished difference Result 22772 states and 104836 transitions. [2022-02-11 00:47:33,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 00:47:33,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 00:47:33,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:33,673 INFO L225 Difference]: With dead ends: 22772 [2022-02-11 00:47:33,673 INFO L226 Difference]: Without dead ends: 22430 [2022-02-11 00:47:33,675 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:47:33,675 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 51 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:33,676 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 52 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:47:33,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22430 states. [2022-02-11 00:47:34,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22430 to 17577. [2022-02-11 00:47:34,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17577 states, 17576 states have (on average 4.741124260355029) internal successors, (83330), 17576 states have internal predecessors, (83330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:34,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17577 states to 17577 states and 83330 transitions. [2022-02-11 00:47:34,356 INFO L78 Accepts]: Start accepts. Automaton has 17577 states and 83330 transitions. Word has length 35 [2022-02-11 00:47:34,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:34,357 INFO L470 AbstractCegarLoop]: Abstraction has 17577 states and 83330 transitions. [2022-02-11 00:47:34,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:34,357 INFO L276 IsEmpty]: Start isEmpty. Operand 17577 states and 83330 transitions. [2022-02-11 00:47:34,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 00:47:34,413 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:34,414 INFO L515 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, 1, 1, 1] [2022-02-11 00:47:34,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-11 00:47:34,414 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 00:47:34,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:34,414 INFO L85 PathProgramCache]: Analyzing trace with hash 36787659, now seen corresponding path program 5 times [2022-02-11 00:47:34,414 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:34,414 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460749588] [2022-02-11 00:47:34,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:34,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:34,454 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:34,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460749588] [2022-02-11 00:47:34,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460749588] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:34,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541401766] [2022-02-11 00:47:34,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:47:34,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:34,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:34,472 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) [2022-02-11 00:47:34,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-11 00:47:34,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:47:34,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:34,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-11 00:47:34,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:34,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:34,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:34,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:34,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541401766] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:34,821 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:34,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-02-11 00:47:34,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870836192] [2022-02-11 00:47:34,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:34,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 00:47:34,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:34,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 00:47:34,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:47:34,822 INFO L87 Difference]: Start difference. First operand 17577 states and 83330 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:35,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:35,094 INFO L93 Difference]: Finished difference Result 24288 states and 111523 transitions. [2022-02-11 00:47:35,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 00:47:35,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 00:47:35,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:35,338 INFO L225 Difference]: With dead ends: 24288 [2022-02-11 00:47:35,339 INFO L226 Difference]: Without dead ends: 23645 [2022-02-11 00:47:35,339 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:47:35,339 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 36 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:35,339 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 59 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:47:35,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23645 states. [2022-02-11 00:47:35,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23645 to 19099. [2022-02-11 00:47:35,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19099 states, 19098 states have (on average 4.717876217404964) internal successors, (90102), 19098 states have internal predecessors, (90102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:36,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19099 states to 19099 states and 90102 transitions. [2022-02-11 00:47:36,142 INFO L78 Accepts]: Start accepts. Automaton has 19099 states and 90102 transitions. Word has length 35 [2022-02-11 00:47:36,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:36,142 INFO L470 AbstractCegarLoop]: Abstraction has 19099 states and 90102 transitions. [2022-02-11 00:47:36,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:36,142 INFO L276 IsEmpty]: Start isEmpty. Operand 19099 states and 90102 transitions. [2022-02-11 00:47:36,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 00:47:36,235 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:36,235 INFO L515 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, 1, 1, 1] [2022-02-11 00:47:36,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:36,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:36,444 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 00:47:36,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:36,444 INFO L85 PathProgramCache]: Analyzing trace with hash -511502213, now seen corresponding path program 6 times [2022-02-11 00:47:36,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:36,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823911444] [2022-02-11 00:47:36,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:36,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:47:36,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:36,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823911444] [2022-02-11 00:47:36,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823911444] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:36,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630801571] [2022-02-11 00:47:36,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:47:36,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:36,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:36,491 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) [2022-02-11 00:47:36,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-11 00:47:36,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:47:36,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:36,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:47:36,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:36,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:47:36,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:47:36,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630801571] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:36,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:36,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2022-02-11 00:47:36,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746277717] [2022-02-11 00:47:36,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:36,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:47:36,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:36,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:47:36,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:47:36,761 INFO L87 Difference]: Start difference. First operand 19099 states and 90102 transitions. Second operand has 16 states, 16 states have (on average 5.5) internal successors, (88), 16 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:38,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:38,867 INFO L93 Difference]: Finished difference Result 61607 states and 268988 transitions. [2022-02-11 00:47:38,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-11 00:47:38,867 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.5) internal successors, (88), 16 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 00:47:38,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:39,260 INFO L225 Difference]: With dead ends: 61607 [2022-02-11 00:47:39,261 INFO L226 Difference]: Without dead ends: 59661 [2022-02-11 00:47:39,262 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1846 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1228, Invalid=3884, Unknown=0, NotChecked=0, Total=5112 [2022-02-11 00:47:39,262 INFO L934 BasicCegarLoop]: 33 mSDtfsCounter, 647 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:39,262 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 282 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:47:39,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59661 states. [2022-02-11 00:47:40,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59661 to 37618. [2022-02-11 00:47:40,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37618 states, 37617 states have (on average 4.593694340324853) internal successors, (172801), 37617 states have internal predecessors, (172801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:40,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37618 states to 37618 states and 172801 transitions. [2022-02-11 00:47:40,929 INFO L78 Accepts]: Start accepts. Automaton has 37618 states and 172801 transitions. Word has length 35 [2022-02-11 00:47:40,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:40,929 INFO L470 AbstractCegarLoop]: Abstraction has 37618 states and 172801 transitions. [2022-02-11 00:47:40,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5) internal successors, (88), 16 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:40,930 INFO L276 IsEmpty]: Start isEmpty. Operand 37618 states and 172801 transitions. [2022-02-11 00:47:41,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 00:47:41,013 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:41,013 INFO L515 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, 1, 1, 1] [2022-02-11 00:47:41,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-02-11 00:47:41,227 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,SelfDestructingSolverStorable16 [2022-02-11 00:47:41,228 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 00:47:41,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:41,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1647323397, now seen corresponding path program 7 times [2022-02-11 00:47:41,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:41,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416841533] [2022-02-11 00:47:41,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:41,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:41,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:41,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416841533] [2022-02-11 00:47:41,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416841533] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:41,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601532372] [2022-02-11 00:47:41,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:47:41,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:41,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:41,281 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) [2022-02-11 00:47:41,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-11 00:47:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:41,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:47:41,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:41,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:41,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601532372] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:41,584 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:41,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-02-11 00:47:41,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85774367] [2022-02-11 00:47:41,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:41,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:47:41,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:41,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:47:41,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:47:41,585 INFO L87 Difference]: Start difference. First operand 37618 states and 172801 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 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) [2022-02-11 00:47:43,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:43,360 INFO L93 Difference]: Finished difference Result 107350 states and 486163 transitions. [2022-02-11 00:47:43,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:47:43,361 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 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 35 [2022-02-11 00:47:43,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:44,005 INFO L225 Difference]: With dead ends: 107350 [2022-02-11 00:47:44,005 INFO L226 Difference]: Without dead ends: 105030 [2022-02-11 00:47:44,005 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=358, Invalid=832, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:47:44,006 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 615 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:44,006 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 165 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:47:44,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105030 states. [2022-02-11 00:47:46,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105030 to 65463. [2022-02-11 00:47:46,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65463 states, 65462 states have (on average 4.7165531147841495) internal successors, (308755), 65462 states have internal predecessors, (308755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:46,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65463 states to 65463 states and 308755 transitions. [2022-02-11 00:47:46,915 INFO L78 Accepts]: Start accepts. Automaton has 65463 states and 308755 transitions. Word has length 35 [2022-02-11 00:47:46,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:46,915 INFO L470 AbstractCegarLoop]: Abstraction has 65463 states and 308755 transitions. [2022-02-11 00:47:46,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 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) [2022-02-11 00:47:46,915 INFO L276 IsEmpty]: Start isEmpty. Operand 65463 states and 308755 transitions. [2022-02-11 00:47:47,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 00:47:47,380 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:47,380 INFO L515 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, 1, 1, 1] [2022-02-11 00:47:47,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:47,580 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,SelfDestructingSolverStorable17 [2022-02-11 00:47:47,581 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 00:47:47,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:47,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1868618369, now seen corresponding path program 8 times [2022-02-11 00:47:47,581 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:47,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000228545] [2022-02-11 00:47:47,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:47,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:47,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:47:47,655 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:47,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000228545] [2022-02-11 00:47:47,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000228545] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:47,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49545031] [2022-02-11 00:47:47,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:47:47,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:47,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:47,672 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) [2022-02-11 00:47:47,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-11 00:47:47,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:47:47,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:47,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:47:47,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:47,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:47,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:47,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49545031] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:47,989 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:47,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-02-11 00:47:47,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191299556] [2022-02-11 00:47:47,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:47,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:47:47,989 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:47,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:47:47,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:47:47,990 INFO L87 Difference]: Start difference. First operand 65463 states and 308755 transitions. Second operand has 16 states, 16 states have (on average 4.5) internal successors, (72), 15 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) [2022-02-11 00:47:49,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:49,699 INFO L93 Difference]: Finished difference Result 131125 states and 590675 transitions. [2022-02-11 00:47:49,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:47:49,699 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 15 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 35 [2022-02-11 00:47:49,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:50,636 INFO L225 Difference]: With dead ends: 131125 [2022-02-11 00:47:50,636 INFO L226 Difference]: Without dead ends: 130939 [2022-02-11 00:47:50,637 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=349, Invalid=841, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:47:50,637 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 602 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:50,637 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 207 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:47:50,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130939 states. [2022-02-11 00:47:53,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130939 to 84261. [2022-02-11 00:47:53,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84261 states, 84260 states have (on average 4.7022549252314265) internal successors, (396212), 84260 states have internal predecessors, (396212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:54,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84261 states to 84261 states and 396212 transitions. [2022-02-11 00:47:54,318 INFO L78 Accepts]: Start accepts. Automaton has 84261 states and 396212 transitions. Word has length 35 [2022-02-11 00:47:54,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:54,318 INFO L470 AbstractCegarLoop]: Abstraction has 84261 states and 396212 transitions. [2022-02-11 00:47:54,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 15 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) [2022-02-11 00:47:54,318 INFO L276 IsEmpty]: Start isEmpty. Operand 84261 states and 396212 transitions. [2022-02-11 00:47:54,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-11 00:47:54,832 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:54,832 INFO L515 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] [2022-02-11 00:47:54,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:55,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:55,033 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 00:47:55,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:55,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1914606333, now seen corresponding path program 9 times [2022-02-11 00:47:55,033 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:55,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370436108] [2022-02-11 00:47:55,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:55,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:47:55,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:55,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370436108] [2022-02-11 00:47:55,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370436108] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:55,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977764058] [2022-02-11 00:47:55,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:47:55,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:55,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:55,065 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) [2022-02-11 00:47:55,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-11 00:47:55,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:47:55,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:55,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:47:55,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:47:55,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:47:55,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977764058] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:55,259 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:55,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 9 [2022-02-11 00:47:55,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837892022] [2022-02-11 00:47:55,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:55,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:47:55,259 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:55,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:47:55,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:47:55,260 INFO L87 Difference]: Start difference. First operand 84261 states and 396212 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 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) [2022-02-11 00:47:56,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:56,856 INFO L93 Difference]: Finished difference Result 132476 states and 608383 transitions. [2022-02-11 00:47:56,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 00:47:56,857 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 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 37 [2022-02-11 00:47:56,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:57,614 INFO L225 Difference]: With dead ends: 132476 [2022-02-11 00:47:57,614 INFO L226 Difference]: Without dead ends: 131442 [2022-02-11 00:47:57,615 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:47:57,615 INFO L934 BasicCegarLoop]: 33 mSDtfsCounter, 219 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:57,615 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 214 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:47:58,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131442 states. [2022-02-11 00:48:01,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131442 to 101762. [2022-02-11 00:48:01,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101762 states, 101761 states have (on average 4.729984964770393) internal successors, (481328), 101761 states have internal predecessors, (481328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:02,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101762 states to 101762 states and 481328 transitions. [2022-02-11 00:48:02,069 INFO L78 Accepts]: Start accepts. Automaton has 101762 states and 481328 transitions. Word has length 37 [2022-02-11 00:48:02,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:02,069 INFO L470 AbstractCegarLoop]: Abstraction has 101762 states and 481328 transitions. [2022-02-11 00:48:02,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 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) [2022-02-11 00:48:02,070 INFO L276 IsEmpty]: Start isEmpty. Operand 101762 states and 481328 transitions. [2022-02-11 00:48:02,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-11 00:48:02,665 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:02,665 INFO L515 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] [2022-02-11 00:48:02,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-02-11 00:48:02,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:02,866 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 00:48:02,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:02,866 INFO L85 PathProgramCache]: Analyzing trace with hash 119071037, now seen corresponding path program 10 times [2022-02-11 00:48:02,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:02,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770786127] [2022-02-11 00:48:02,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:02,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:48:02,917 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:02,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770786127] [2022-02-11 00:48:02,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770786127] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:02,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912779017] [2022-02-11 00:48:02,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:48:02,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:02,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:02,918 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) [2022-02-11 00:48:02,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-11 00:48:02,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:48:02,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:02,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:48:02,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:48:03,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:48:03,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912779017] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:03,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:03,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 00:48:03,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900438702] [2022-02-11 00:48:03,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:03,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:48:03,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:03,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:48:03,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:48:03,192 INFO L87 Difference]: Start difference. First operand 101762 states and 481328 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 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) [2022-02-11 00:48:06,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:06,160 INFO L93 Difference]: Finished difference Result 225429 states and 1055743 transitions. [2022-02-11 00:48:06,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:48:06,161 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 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 37 [2022-02-11 00:48:06,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:07,974 INFO L225 Difference]: With dead ends: 225429 [2022-02-11 00:48:07,974 INFO L226 Difference]: Without dead ends: 224048 [2022-02-11 00:48:07,975 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:48:07,975 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 580 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:07,975 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [580 Valid, 191 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:48:08,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224048 states. [2022-02-11 00:48:14,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224048 to 175351. [2022-02-11 00:48:15,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175351 states, 175350 states have (on average 4.8957627601938976) internal successors, (858472), 175350 states have internal predecessors, (858472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:17,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175351 states to 175351 states and 858472 transitions. [2022-02-11 00:48:17,302 INFO L78 Accepts]: Start accepts. Automaton has 175351 states and 858472 transitions. Word has length 37 [2022-02-11 00:48:17,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:17,303 INFO L470 AbstractCegarLoop]: Abstraction has 175351 states and 858472 transitions. [2022-02-11 00:48:17,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 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) [2022-02-11 00:48:17,303 INFO L276 IsEmpty]: Start isEmpty. Operand 175351 states and 858472 transitions. [2022-02-11 00:48:18,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-11 00:48:18,446 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:18,446 INFO L515 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] [2022-02-11 00:48:18,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-11 00:48:18,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-02-11 00:48:18,659 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 00:48:18,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:18,660 INFO L85 PathProgramCache]: Analyzing trace with hash 862530109, now seen corresponding path program 11 times [2022-02-11 00:48:18,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:18,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188446608] [2022-02-11 00:48:18,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:18,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:48:18,715 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:18,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188446608] [2022-02-11 00:48:18,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188446608] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:18,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983141935] [2022-02-11 00:48:18,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:48:18,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:18,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:18,716 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) [2022-02-11 00:48:18,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-11 00:48:18,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:48:18,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:18,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:48:18,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:18,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:18,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:19,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983141935] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:19,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:19,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-02-11 00:48:19,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186850963] [2022-02-11 00:48:19,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:19,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:48:19,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:19,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:48:19,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:48:19,032 INFO L87 Difference]: Start difference. First operand 175351 states and 858472 transitions. Second operand has 15 states, 15 states have (on average 5.4) internal successors, (81), 15 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) [2022-02-11 00:48:25,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:25,901 INFO L93 Difference]: Finished difference Result 455289 states and 2152646 transitions. [2022-02-11 00:48:25,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-11 00:48:25,902 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 15 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 37 [2022-02-11 00:48:25,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:29,911 INFO L225 Difference]: With dead ends: 455289 [2022-02-11 00:48:29,911 INFO L226 Difference]: Without dead ends: 445874 [2022-02-11 00:48:29,913 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=884, Invalid=3276, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 00:48:29,914 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 537 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:29,914 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 357 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:48:30,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445874 states. [2022-02-11 00:48:47,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445874 to 322452. [2022-02-11 00:48:48,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322452 states, 322451 states have (on average 4.898114752318957) internal successors, (1579402), 322451 states have internal predecessors, (1579402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:52,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322452 states to 322452 states and 1579402 transitions. [2022-02-11 00:48:52,882 INFO L78 Accepts]: Start accepts. Automaton has 322452 states and 1579402 transitions. Word has length 37 [2022-02-11 00:48:52,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:52,883 INFO L470 AbstractCegarLoop]: Abstraction has 322452 states and 1579402 transitions. [2022-02-11 00:48:52,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 15 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) [2022-02-11 00:48:52,883 INFO L276 IsEmpty]: Start isEmpty. Operand 322452 states and 1579402 transitions. [2022-02-11 00:48:54,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-11 00:48:54,727 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:54,727 INFO L515 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] [2022-02-11 00:48:54,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-11 00:48:54,937 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,SelfDestructingSolverStorable21 [2022-02-11 00:48:54,937 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 00:48:54,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:54,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1700987573, now seen corresponding path program 12 times [2022-02-11 00:48:54,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:54,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838323899] [2022-02-11 00:48:54,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:54,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:48:54,992 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:54,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838323899] [2022-02-11 00:48:55,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838323899] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:55,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856292533] [2022-02-11 00:48:55,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:48:55,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:55,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:55,008 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) [2022-02-11 00:48:55,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-11 00:48:55,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:48:55,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:55,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:48:55,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:55,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:55,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:55,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:55,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856292533] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:55,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:55,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 17 [2022-02-11 00:48:55,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886148998] [2022-02-11 00:48:55,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:55,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:48:55,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:55,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:48:55,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:48:55,355 INFO L87 Difference]: Start difference. First operand 322452 states and 1579402 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:04,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:04,609 INFO L93 Difference]: Finished difference Result 436832 states and 2113397 transitions. [2022-02-11 00:49:04,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-11 00:49:04,609 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-02-11 00:49:04,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:10,939 INFO L225 Difference]: With dead ends: 436832 [2022-02-11 00:49:10,940 INFO L226 Difference]: Without dead ends: 434894 [2022-02-11 00:49:10,940 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1054, Invalid=3106, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 00:49:10,941 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 427 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:10,941 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 251 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:49:12,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434894 states. [2022-02-11 00:49:28,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434894 to 384064. [2022-02-11 00:49:29,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384064 states, 384063 states have (on average 4.9422724917526555) internal successors, (1898144), 384063 states have internal predecessors, (1898144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:34,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384064 states to 384064 states and 1898144 transitions. [2022-02-11 00:49:34,523 INFO L78 Accepts]: Start accepts. Automaton has 384064 states and 1898144 transitions. Word has length 37 [2022-02-11 00:49:34,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:34,523 INFO L470 AbstractCegarLoop]: Abstraction has 384064 states and 1898144 transitions. [2022-02-11 00:49:34,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:34,524 INFO L276 IsEmpty]: Start isEmpty. Operand 384064 states and 1898144 transitions. [2022-02-11 00:49:37,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-11 00:49:37,399 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:37,399 INFO L515 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, 1, 1, 1] [2022-02-11 00:49:37,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:37,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:37,605 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-11 00:49:37,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:37,606 INFO L85 PathProgramCache]: Analyzing trace with hash 942207807, now seen corresponding path program 13 times [2022-02-11 00:49:37,606 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:37,606 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578519168] [2022-02-11 00:49:37,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:37,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-02-11 00:49:37,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:37,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578519168] [2022-02-11 00:49:37,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578519168] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:37,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380351295] [2022-02-11 00:49:37,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:49:37,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:37,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:37,680 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) [2022-02-11 00:49:37,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-11 00:49:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:37,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-11 00:49:37,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:37,957 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:49:37,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:49:38,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380351295] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:38,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:38,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 19 [2022-02-11 00:49:38,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971179781] [2022-02-11 00:49:38,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:38,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:49:38,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:38,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:49:38,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:49:38,124 INFO L87 Difference]: Start difference. First operand 384064 states and 1898144 transitions. Second operand has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)