/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x6.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 14:52:44,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 14:52:44,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 14:52:44,215 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 14:52:44,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 14:52:44,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 14:52:44,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 14:52:44,266 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2022-01-18 14:52:44,299 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 14:52:44,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 14:52:44,300 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 14:52:44,300 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 14:52:44,301 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 14:52:44,301 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 14:52:44,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 14:52:44,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 14:52:44,302 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 14:52:44,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 14:52:44,303 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 14:52:44,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 14:52:44,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 14:52:44,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 14:52:44,303 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 14:52:44,304 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 14:52:44,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 14:52:44,304 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 14:52:44,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 14:52:44,304 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 14:52:44,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 14:52:44,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 14:52:44,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 14:52:44,304 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 14:52:44,306 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 14:52:44,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 14:52:44,306 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 14:52:44,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 14:52:44,306 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 14:52:44,306 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 14:52:44,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 14:52:44,307 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 14:52:44,307 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 14:52:44,307 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 14:52:44,307 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 14:52:44,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 14:52:44,518 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 14:52:44,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 14:52:44,521 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 14:52:44,522 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 14:52:44,523 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x6.wvr.bpl [2022-01-18 14:52:44,523 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x6.wvr.bpl' [2022-01-18 14:52:44,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 14:52:44,548 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 14:52:44,553 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 14:52:44,553 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 14:52:44,553 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 14:52:44,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:52:44" (1/1) ... [2022-01-18 14:52:44,574 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:52:44" (1/1) ... [2022-01-18 14:52:44,578 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 14:52:44,579 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 14:52:44,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 14:52:44,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 14:52:44,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 14:52:44,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:52:44" (1/1) ... [2022-01-18 14:52:44,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:52:44" (1/1) ... [2022-01-18 14:52:44,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:52:44" (1/1) ... [2022-01-18 14:52:44,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:52:44" (1/1) ... [2022-01-18 14:52:44,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:52:44" (1/1) ... [2022-01-18 14:52:44,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:52:44" (1/1) ... [2022-01-18 14:52:44,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:52:44" (1/1) ... [2022-01-18 14:52:44,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 14:52:44,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 14:52:44,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 14:52:44,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 14:52:44,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:52:44" (1/1) ... [2022-01-18 14:52:44,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 14:52:44,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:52:44,618 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 14:52:44,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 14:52:44,652 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 14:52:44,652 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 14:52:44,652 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 14:52:44,652 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 14:52:44,652 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 14:52:44,652 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 14:52:44,653 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 14:52:44,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 14:52:44,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 14:52:44,653 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 14:52:44,653 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 14:52:44,653 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 14:52:44,653 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-01-18 14:52:44,653 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-01-18 14:52:44,653 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-01-18 14:52:44,654 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 14:52:44,697 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 14:52:44,701 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 14:52:44,781 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 14:52:44,787 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 14:52:44,787 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 14:52:44,789 INFO L202 PluginConnector]: Adding new model exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 02:52:44 BoogieIcfgContainer [2022-01-18 14:52:44,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 14:52:44,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 14:52:44,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 14:52:44,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 14:52:44,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:52:44" (1/2) ... [2022-01-18 14:52:44,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@909afcc and model type exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 02:52:44, skipping insertion in model container [2022-01-18 14:52:44,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 02:52:44" (2/2) ... [2022-01-18 14:52:44,796 INFO L111 eAbstractionObserver]: Analyzing ICFG exp2x6.wvr.bpl [2022-01-18 14:52:44,799 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 14:52:44,799 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 14:52:44,799 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 14:52:44,799 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 14:52:44,845 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-01-18 14:52:44,875 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 14:52:44,881 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 14:52:44,881 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-01-18 14:52:44,889 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 54 places, 45 transitions, 122 flow [2022-01-18 14:52:45,103 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3204 states, 3203 states have (on average 3.9572275991258197) internal successors, (12675), 3203 states have internal predecessors, (12675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:45,116 INFO L276 IsEmpty]: Start isEmpty. Operand has 3204 states, 3203 states have (on average 3.9572275991258197) internal successors, (12675), 3203 states have internal predecessors, (12675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:45,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 14:52:45,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:52:45,151 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:52:45,152 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:52:45,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:52:45,160 INFO L85 PathProgramCache]: Analyzing trace with hash 450232179, now seen corresponding path program 1 times [2022-01-18 14:52:45,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:52:45,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382755706] [2022-01-18 14:52:45,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:52:45,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:52:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:52:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:52:45,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:52:45,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382755706] [2022-01-18 14:52:45,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382755706] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:52:45,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:52:45,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 14:52:45,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694612405] [2022-01-18 14:52:45,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:52:45,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 14:52:45,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:52:45,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 14:52:45,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 14:52:45,427 INFO L87 Difference]: Start difference. First operand has 3204 states, 3203 states have (on average 3.9572275991258197) internal successors, (12675), 3203 states have internal predecessors, (12675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:45,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:52:45,566 INFO L93 Difference]: Finished difference Result 3629 states and 14324 transitions. [2022-01-18 14:52:45,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 14:52:45,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 14:52:45,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:52:45,620 INFO L225 Difference]: With dead ends: 3629 [2022-01-18 14:52:45,621 INFO L226 Difference]: Without dead ends: 3598 [2022-01-18 14:52:45,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 14:52:45,629 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:52:45,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 24 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:52:45,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2022-01-18 14:52:45,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 3333. [2022-01-18 14:52:45,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3333 states, 3332 states have (on average 3.952280912364946) internal successors, (13169), 3332 states have internal predecessors, (13169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:45,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3333 states to 3333 states and 13169 transitions. [2022-01-18 14:52:45,923 INFO L78 Accepts]: Start accepts. Automaton has 3333 states and 13169 transitions. Word has length 19 [2022-01-18 14:52:45,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:52:45,924 INFO L470 AbstractCegarLoop]: Abstraction has 3333 states and 13169 transitions. [2022-01-18 14:52:45,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:45,925 INFO L276 IsEmpty]: Start isEmpty. Operand 3333 states and 13169 transitions. [2022-01-18 14:52:45,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 14:52:45,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:52:45,939 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:52:45,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 14:52:45,940 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:52:45,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:52:45,942 INFO L85 PathProgramCache]: Analyzing trace with hash -524256119, now seen corresponding path program 1 times [2022-01-18 14:52:45,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:52:45,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069664329] [2022-01-18 14:52:45,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:52:45,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:52:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:52:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:52:46,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:52:46,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069664329] [2022-01-18 14:52:46,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069664329] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:52:46,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40102633] [2022-01-18 14:52:46,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:52:46,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:52:46,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:52:46,067 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:52:46,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 14:52:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:52:46,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 14:52:46,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:52:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:52:46,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:52:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:52:46,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40102633] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:52:46,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:52:46,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-01-18 14:52:46,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086707974] [2022-01-18 14:52:46,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:52:46,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 14:52:46,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:52:46,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 14:52:46,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:52:46,302 INFO L87 Difference]: Start difference. First operand 3333 states and 13169 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:46,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:52:46,539 INFO L93 Difference]: Finished difference Result 6205 states and 23911 transitions. [2022-01-18 14:52:46,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 14:52:46,540 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 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 24 [2022-01-18 14:52:46,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:52:46,582 INFO L225 Difference]: With dead ends: 6205 [2022-01-18 14:52:46,583 INFO L226 Difference]: Without dead ends: 6205 [2022-01-18 14:52:46,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:52:46,586 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 105 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:52:46,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 121 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:52:46,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6205 states. [2022-01-18 14:52:46,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6205 to 3838. [2022-01-18 14:52:46,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 3.988272087568413) internal successors, (15303), 3837 states have internal predecessors, (15303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:46,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 15303 transitions. [2022-01-18 14:52:46,809 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 15303 transitions. Word has length 24 [2022-01-18 14:52:46,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:52:46,810 INFO L470 AbstractCegarLoop]: Abstraction has 3838 states and 15303 transitions. [2022-01-18 14:52:46,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:46,811 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 15303 transitions. [2022-01-18 14:52:46,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 14:52:46,841 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:52:46,841 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:52:46,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 14:52:47,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:52:47,060 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:52:47,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:52:47,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1859792702, now seen corresponding path program 1 times [2022-01-18 14:52:47,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:52:47,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249054189] [2022-01-18 14:52:47,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:52:47,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:52:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:52:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:52:47,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:52:47,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249054189] [2022-01-18 14:52:47,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249054189] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:52:47,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:52:47,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 14:52:47,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829349216] [2022-01-18 14:52:47,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:52:47,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 14:52:47,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:52:47,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 14:52:47,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:52:47,160 INFO L87 Difference]: Start difference. First operand 3838 states and 15303 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:47,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:52:47,249 INFO L93 Difference]: Finished difference Result 4614 states and 17875 transitions. [2022-01-18 14:52:47,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 14:52:47,250 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 14:52:47,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:52:47,292 INFO L225 Difference]: With dead ends: 4614 [2022-01-18 14:52:47,293 INFO L226 Difference]: Without dead ends: 4594 [2022-01-18 14:52:47,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:52:47,295 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 52 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:52:47,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 61 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:52:47,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4594 states. [2022-01-18 14:52:47,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4594 to 4099. [2022-01-18 14:52:47,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4099 states, 4098 states have (on average 3.9487554904831623) internal successors, (16182), 4098 states have internal predecessors, (16182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:47,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4099 states to 4099 states and 16182 transitions. [2022-01-18 14:52:47,425 INFO L78 Accepts]: Start accepts. Automaton has 4099 states and 16182 transitions. Word has length 24 [2022-01-18 14:52:47,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:52:47,425 INFO L470 AbstractCegarLoop]: Abstraction has 4099 states and 16182 transitions. [2022-01-18 14:52:47,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:47,425 INFO L276 IsEmpty]: Start isEmpty. Operand 4099 states and 16182 transitions. [2022-01-18 14:52:47,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 14:52:47,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:52:47,478 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:52:47,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 14:52:47,478 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:52:47,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:52:47,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1974963633, now seen corresponding path program 1 times [2022-01-18 14:52:47,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:52:47,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187182697] [2022-01-18 14:52:47,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:52:47,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:52:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:52:47,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:52:47,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:52:47,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187182697] [2022-01-18 14:52:47,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187182697] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:52:47,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675406981] [2022-01-18 14:52:47,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:52:47,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:52:47,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:52:47,539 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:52:47,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 14:52:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:52:47,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 14:52:47,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:52:47,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:52:47,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:52:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:52:47,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675406981] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:52:47,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:52:47,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-01-18 14:52:47,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4052538] [2022-01-18 14:52:47,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:52:47,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 14:52:47,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:52:47,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 14:52:47,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:52:47,717 INFO L87 Difference]: Start difference. First operand 4099 states and 16182 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:47,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:52:47,893 INFO L93 Difference]: Finished difference Result 7064 states and 27253 transitions. [2022-01-18 14:52:47,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 14:52:47,893 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 14:52:47,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:52:47,929 INFO L225 Difference]: With dead ends: 7064 [2022-01-18 14:52:47,930 INFO L226 Difference]: Without dead ends: 7064 [2022-01-18 14:52:47,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:52:47,931 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 108 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:52:47,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 125 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:52:47,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7064 states. [2022-01-18 14:52:48,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7064 to 4827. [2022-01-18 14:52:48,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4827 states, 4826 states have (on average 3.999171156237049) internal successors, (19300), 4826 states have internal predecessors, (19300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:48,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4827 states to 4827 states and 19300 transitions. [2022-01-18 14:52:48,114 INFO L78 Accepts]: Start accepts. Automaton has 4827 states and 19300 transitions. Word has length 24 [2022-01-18 14:52:48,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:52:48,115 INFO L470 AbstractCegarLoop]: Abstraction has 4827 states and 19300 transitions. [2022-01-18 14:52:48,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:48,115 INFO L276 IsEmpty]: Start isEmpty. Operand 4827 states and 19300 transitions. [2022-01-18 14:52:48,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 14:52:48,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:52:48,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:52:48,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 14:52:48,343 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,SelfDestructingSolverStorable3 [2022-01-18 14:52:48,344 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:52:48,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:52:48,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1076479876, now seen corresponding path program 1 times [2022-01-18 14:52:48,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:52:48,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477656552] [2022-01-18 14:52:48,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:52:48,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:52:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:52:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:52:48,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:52:48,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477656552] [2022-01-18 14:52:48,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477656552] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:52:48,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:52:48,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 14:52:48,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036793980] [2022-01-18 14:52:48,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:52:48,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 14:52:48,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:52:48,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 14:52:48,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:52:48,393 INFO L87 Difference]: Start difference. First operand 4827 states and 19300 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:48,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:52:48,514 INFO L93 Difference]: Finished difference Result 5633 states and 21970 transitions. [2022-01-18 14:52:48,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 14:52:48,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 14:52:48,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:52:48,546 INFO L225 Difference]: With dead ends: 5633 [2022-01-18 14:52:48,546 INFO L226 Difference]: Without dead ends: 5568 [2022-01-18 14:52:48,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:52:48,547 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 46 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:52:48,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 63 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:52:48,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5568 states. [2022-01-18 14:52:48,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5568 to 5161. [2022-01-18 14:52:48,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5161 states, 5160 states have (on average 3.9622093023255816) internal successors, (20445), 5160 states have internal predecessors, (20445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:48,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5161 states to 5161 states and 20445 transitions. [2022-01-18 14:52:48,691 INFO L78 Accepts]: Start accepts. Automaton has 5161 states and 20445 transitions. Word has length 24 [2022-01-18 14:52:48,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:52:48,691 INFO L470 AbstractCegarLoop]: Abstraction has 5161 states and 20445 transitions. [2022-01-18 14:52:48,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:48,692 INFO L276 IsEmpty]: Start isEmpty. Operand 5161 states and 20445 transitions. [2022-01-18 14:52:48,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 14:52:48,706 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:52:48,706 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:52:48,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 14:52:48,706 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:52:48,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:52:48,707 INFO L85 PathProgramCache]: Analyzing trace with hash 50378376, now seen corresponding path program 2 times [2022-01-18 14:52:48,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:52:48,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075787356] [2022-01-18 14:52:48,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:52:48,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:52:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:52:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:52:48,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:52:48,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075787356] [2022-01-18 14:52:48,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075787356] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:52:48,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:52:48,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 14:52:48,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510613577] [2022-01-18 14:52:48,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:52:48,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 14:52:48,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:52:48,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 14:52:48,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:52:48,780 INFO L87 Difference]: Start difference. First operand 5161 states and 20445 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:48,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:52:48,894 INFO L93 Difference]: Finished difference Result 6066 states and 23776 transitions. [2022-01-18 14:52:48,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:52:48,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 14:52:48,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:52:48,920 INFO L225 Difference]: With dead ends: 6066 [2022-01-18 14:52:48,921 INFO L226 Difference]: Without dead ends: 6066 [2022-01-18 14:52:48,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:52:48,922 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 63 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:52:48,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 89 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:52:48,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6066 states. [2022-01-18 14:52:49,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6066 to 5526. [2022-01-18 14:52:49,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5526 states, 5525 states have (on average 3.9632579185520362) internal successors, (21897), 5525 states have internal predecessors, (21897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:49,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5526 states to 5526 states and 21897 transitions. [2022-01-18 14:52:49,100 INFO L78 Accepts]: Start accepts. Automaton has 5526 states and 21897 transitions. Word has length 24 [2022-01-18 14:52:49,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:52:49,101 INFO L470 AbstractCegarLoop]: Abstraction has 5526 states and 21897 transitions. [2022-01-18 14:52:49,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:49,101 INFO L276 IsEmpty]: Start isEmpty. Operand 5526 states and 21897 transitions. [2022-01-18 14:52:49,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 14:52:49,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:52:49,116 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:52:49,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-18 14:52:49,117 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:52:49,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:52:49,117 INFO L85 PathProgramCache]: Analyzing trace with hash -19268542, now seen corresponding path program 2 times [2022-01-18 14:52:49,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:52:49,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201172481] [2022-01-18 14:52:49,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:52:49,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:52:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:52:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:52:49,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:52:49,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201172481] [2022-01-18 14:52:49,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201172481] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:52:49,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:52:49,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 14:52:49,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230298039] [2022-01-18 14:52:49,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:52:49,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 14:52:49,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:52:49,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 14:52:49,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:52:49,150 INFO L87 Difference]: Start difference. First operand 5526 states and 21897 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:49,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:52:49,255 INFO L93 Difference]: Finished difference Result 6785 states and 26493 transitions. [2022-01-18 14:52:49,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:52:49,255 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 14:52:49,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:52:49,281 INFO L225 Difference]: With dead ends: 6785 [2022-01-18 14:52:49,281 INFO L226 Difference]: Without dead ends: 6785 [2022-01-18 14:52:49,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:52:49,283 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 85 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:52:49,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 82 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:52:49,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6785 states. [2022-01-18 14:52:49,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6785 to 6067. [2022-01-18 14:52:49,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6067 states, 6066 states have (on average 3.9658753709198815) internal successors, (24057), 6066 states have internal predecessors, (24057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:49,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6067 states to 6067 states and 24057 transitions. [2022-01-18 14:52:49,474 INFO L78 Accepts]: Start accepts. Automaton has 6067 states and 24057 transitions. Word has length 24 [2022-01-18 14:52:49,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:52:49,474 INFO L470 AbstractCegarLoop]: Abstraction has 6067 states and 24057 transitions. [2022-01-18 14:52:49,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:49,474 INFO L276 IsEmpty]: Start isEmpty. Operand 6067 states and 24057 transitions. [2022-01-18 14:52:49,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:52:49,493 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:52:49,493 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:52:49,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-18 14:52:49,493 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:52:49,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:52:49,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1048604648, now seen corresponding path program 1 times [2022-01-18 14:52:49,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:52:49,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66199978] [2022-01-18 14:52:49,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:52:49,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:52:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:52:49,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:52:49,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:52:49,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66199978] [2022-01-18 14:52:49,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66199978] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:52:49,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541944547] [2022-01-18 14:52:49,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:52:49,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:52:49,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:52:49,666 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:52:49,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 14:52:49,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:52:49,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:52:49,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:52:50,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:52:50,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:52:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:52:50,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541944547] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:52:50,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:52:50,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 6] total 10 [2022-01-18 14:52:50,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469923621] [2022-01-18 14:52:50,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:52:50,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:52:50,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:52:50,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:52:50,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:52:50,865 INFO L87 Difference]: Start difference. First operand 6067 states and 24057 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:51,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:52:51,782 INFO L93 Difference]: Finished difference Result 8499 states and 32997 transitions. [2022-01-18 14:52:51,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:52:51,783 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:52:51,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:52:51,813 INFO L225 Difference]: With dead ends: 8499 [2022-01-18 14:52:51,813 INFO L226 Difference]: Without dead ends: 8363 [2022-01-18 14:52:51,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 12 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:52:51,814 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 124 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 14:52:51,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 242 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1363 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 14:52:51,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8363 states. [2022-01-18 14:52:51,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8363 to 6744. [2022-01-18 14:52:51,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6744 states, 6743 states have (on average 3.9549162094023433) internal successors, (26668), 6743 states have internal predecessors, (26668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:51,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6744 states to 6744 states and 26668 transitions. [2022-01-18 14:52:51,997 INFO L78 Accepts]: Start accepts. Automaton has 6744 states and 26668 transitions. Word has length 29 [2022-01-18 14:52:51,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:52:51,997 INFO L470 AbstractCegarLoop]: Abstraction has 6744 states and 26668 transitions. [2022-01-18 14:52:51,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:51,997 INFO L276 IsEmpty]: Start isEmpty. Operand 6744 states and 26668 transitions. [2022-01-18 14:52:52,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:52:52,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:52:52,016 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:52:52,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 14:52:52,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:52:52,231 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:52:52,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:52:52,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1458786176, now seen corresponding path program 2 times [2022-01-18 14:52:52,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:52:52,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081668424] [2022-01-18 14:52:52,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:52:52,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:52:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:52:52,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:52:52,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:52:52,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081668424] [2022-01-18 14:52:52,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081668424] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:52:52,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869894655] [2022-01-18 14:52:52,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:52:52,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:52:52,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:52:52,328 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:52:52,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 14:52:52,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:52:52,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:52:52,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:52:52,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:52:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:52:53,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:52:53,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:52:53,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869894655] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:52:53,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:52:53,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 6] total 11 [2022-01-18 14:52:53,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999525428] [2022-01-18 14:52:53,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:52:53,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:52:53,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:52:53,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:52:53,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:52:53,428 INFO L87 Difference]: Start difference. First operand 6744 states and 26668 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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) [2022-01-18 14:52:54,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:52:54,919 INFO L93 Difference]: Finished difference Result 10094 states and 39061 transitions. [2022-01-18 14:52:54,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:52:54,919 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 29 [2022-01-18 14:52:54,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:52:54,955 INFO L225 Difference]: With dead ends: 10094 [2022-01-18 14:52:54,955 INFO L226 Difference]: Without dead ends: 9890 [2022-01-18 14:52:54,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 13 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:52:54,956 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 144 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 1603 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:52:54,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 279 Invalid, 1659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1603 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 14:52:54,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9890 states. [2022-01-18 14:52:55,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9890 to 7521. [2022-01-18 14:52:55,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7521 states, 7520 states have (on average 3.9558510638297872) internal successors, (29748), 7520 states have internal predecessors, (29748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:55,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7521 states to 7521 states and 29748 transitions. [2022-01-18 14:52:55,200 INFO L78 Accepts]: Start accepts. Automaton has 7521 states and 29748 transitions. Word has length 29 [2022-01-18 14:52:55,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:52:55,201 INFO L470 AbstractCegarLoop]: Abstraction has 7521 states and 29748 transitions. [2022-01-18 14:52:55,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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) [2022-01-18 14:52:55,201 INFO L276 IsEmpty]: Start isEmpty. Operand 7521 states and 29748 transitions. [2022-01-18 14:52:55,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:52:55,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:52:55,221 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:52:55,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-18 14:52:55,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:52:55,421 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:52:55,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:52:55,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1515297138, now seen corresponding path program 3 times [2022-01-18 14:52:55,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:52:55,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807371247] [2022-01-18 14:52:55,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:52:55,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:52:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:52:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:52:55,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:52:55,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807371247] [2022-01-18 14:52:55,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807371247] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:52:55,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592252817] [2022-01-18 14:52:55,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:52:55,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:52:55,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:52:55,540 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:52:55,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 14:52:55,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 14:52:55,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:52:55,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:52:55,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:52:56,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:52:56,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:52:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:52:56,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592252817] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:52:56,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:52:56,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 6] total 12 [2022-01-18 14:52:56,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527386763] [2022-01-18 14:52:56,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:52:56,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:52:56,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:52:56,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:52:56,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:52:56,733 INFO L87 Difference]: Start difference. First operand 7521 states and 29748 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:58,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:52:58,242 INFO L93 Difference]: Finished difference Result 11487 states and 44565 transitions. [2022-01-18 14:52:58,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:52:58,242 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:52:58,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:52:58,282 INFO L225 Difference]: With dead ends: 11487 [2022-01-18 14:52:58,282 INFO L226 Difference]: Without dead ends: 11283 [2022-01-18 14:52:58,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 12 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:52:58,283 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 167 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:52:58,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 297 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1684 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 14:52:58,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11283 states. [2022-01-18 14:52:58,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11283 to 8545. [2022-01-18 14:52:58,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8545 states, 8544 states have (on average 3.958918539325843) internal successors, (33825), 8544 states have internal predecessors, (33825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:58,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8545 states to 8545 states and 33825 transitions. [2022-01-18 14:52:58,615 INFO L78 Accepts]: Start accepts. Automaton has 8545 states and 33825 transitions. Word has length 29 [2022-01-18 14:52:58,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:52:58,616 INFO L470 AbstractCegarLoop]: Abstraction has 8545 states and 33825 transitions. [2022-01-18 14:52:58,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:52:58,616 INFO L276 IsEmpty]: Start isEmpty. Operand 8545 states and 33825 transitions. [2022-01-18 14:52:58,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:52:58,638 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:52:58,638 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:52:58,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 14:52:58,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-18 14:52:58,852 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:52:58,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:52:58,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1805295454, now seen corresponding path program 4 times [2022-01-18 14:52:58,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:52:58,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003997178] [2022-01-18 14:52:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:52:58,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:52:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:52:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:52:58,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:52:58,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003997178] [2022-01-18 14:52:58,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003997178] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:52:58,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310338278] [2022-01-18 14:52:58,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:52:58,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:52:58,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:52:58,952 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:52:58,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 14:52:58,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:52:58,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:52:58,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:52:58,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:53:00,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:53:00,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:53:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:53:00,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310338278] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:53:00,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:53:00,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 6] total 13 [2022-01-18 14:53:00,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882598039] [2022-01-18 14:53:00,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:53:00,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:53:00,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:53:00,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:53:00,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:53:00,413 INFO L87 Difference]: Start difference. First operand 8545 states and 33825 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:53:02,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:53:02,482 INFO L93 Difference]: Finished difference Result 11493 states and 44847 transitions. [2022-01-18 14:53:02,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:53:02,482 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:53:02,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:53:02,511 INFO L225 Difference]: With dead ends: 11493 [2022-01-18 14:53:02,511 INFO L226 Difference]: Without dead ends: 11357 [2022-01-18 14:53:02,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 11 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:53:02,512 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 165 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 1898 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:53:02,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 342 Invalid, 1963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1898 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-18 14:53:02,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11357 states. [2022-01-18 14:53:02,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11357 to 9738. [2022-01-18 14:53:02,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9738 states, 9737 states have (on average 3.96333572969087) internal successors, (38591), 9737 states have internal predecessors, (38591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:53:02,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9738 states to 9738 states and 38591 transitions. [2022-01-18 14:53:02,774 INFO L78 Accepts]: Start accepts. Automaton has 9738 states and 38591 transitions. Word has length 29 [2022-01-18 14:53:02,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:53:02,774 INFO L470 AbstractCegarLoop]: Abstraction has 9738 states and 38591 transitions. [2022-01-18 14:53:02,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:53:02,774 INFO L276 IsEmpty]: Start isEmpty. Operand 9738 states and 38591 transitions. [2022-01-18 14:53:02,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:53:02,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:53:02,793 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:53:02,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-18 14:53:02,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:53:02,994 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:53:02,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:53:02,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1672319534, now seen corresponding path program 5 times [2022-01-18 14:53:02,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:53:02,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875193659] [2022-01-18 14:53:02,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:53:02,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:53:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:53:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:53:03,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:53:03,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875193659] [2022-01-18 14:53:03,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875193659] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:53:03,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:53:03,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-18 14:53:03,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780223814] [2022-01-18 14:53:03,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:53:03,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:53:03,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:53:03,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:53:03,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:53:03,095 INFO L87 Difference]: Start difference. First operand 9738 states and 38591 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:53:03,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:53:03,483 INFO L93 Difference]: Finished difference Result 12122 states and 47539 transitions. [2022-01-18 14:53:03,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:53:03,484 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:53:03,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:53:03,515 INFO L225 Difference]: With dead ends: 12122 [2022-01-18 14:53:03,515 INFO L226 Difference]: Without dead ends: 12054 [2022-01-18 14:53:03,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:53:03,516 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 71 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:53:03,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 126 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:53:03,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12054 states. [2022-01-18 14:53:03,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12054 to 11043. [2022-01-18 14:53:03,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11043 states, 11042 states have (on average 3.967034957435247) internal successors, (43804), 11042 states have internal predecessors, (43804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:53:03,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11043 states to 11043 states and 43804 transitions. [2022-01-18 14:53:03,787 INFO L78 Accepts]: Start accepts. Automaton has 11043 states and 43804 transitions. Word has length 29 [2022-01-18 14:53:03,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:53:03,787 INFO L470 AbstractCegarLoop]: Abstraction has 11043 states and 43804 transitions. [2022-01-18 14:53:03,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:53:03,788 INFO L276 IsEmpty]: Start isEmpty. Operand 11043 states and 43804 transitions. [2022-01-18 14:53:03,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:53:03,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:53:03,807 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:53:03,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-18 14:53:03,807 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:53:03,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:53:03,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1478967768, now seen corresponding path program 1 times [2022-01-18 14:53:03,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:53:03,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89205237] [2022-01-18 14:53:03,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:53:03,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:53:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:53:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:53:03,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:53:03,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89205237] [2022-01-18 14:53:03,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89205237] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:53:03,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984482844] [2022-01-18 14:53:03,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:53:03,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:53:03,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:53:03,888 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:53:03,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 14:53:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:53:03,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:53:03,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:53:04,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:53:04,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:53:04,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:53:04,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984482844] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:53:04,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:53:04,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 6] total 10 [2022-01-18 14:53:04,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3838130] [2022-01-18 14:53:04,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:53:04,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:53:04,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:53:04,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:53:04,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:53:04,546 INFO L87 Difference]: Start difference. First operand 11043 states and 43804 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:53:05,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:53:05,180 INFO L93 Difference]: Finished difference Result 13109 states and 51239 transitions. [2022-01-18 14:53:05,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:53:05,181 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:53:05,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:53:05,215 INFO L225 Difference]: With dead ends: 13109 [2022-01-18 14:53:05,215 INFO L226 Difference]: Without dead ends: 13007 [2022-01-18 14:53:05,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 12 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:53:05,215 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 124 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 1343 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:53:05,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 244 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1343 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:53:05,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13007 states. [2022-01-18 14:53:05,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13007 to 11738. [2022-01-18 14:53:05,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11738 states, 11737 states have (on average 3.9537360483939676) internal successors, (46405), 11737 states have internal predecessors, (46405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:53:05,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11738 states to 11738 states and 46405 transitions. [2022-01-18 14:53:05,491 INFO L78 Accepts]: Start accepts. Automaton has 11738 states and 46405 transitions. Word has length 29 [2022-01-18 14:53:05,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:53:05,491 INFO L470 AbstractCegarLoop]: Abstraction has 11738 states and 46405 transitions. [2022-01-18 14:53:05,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:53:05,492 INFO L276 IsEmpty]: Start isEmpty. Operand 11738 states and 46405 transitions. [2022-01-18 14:53:05,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:53:05,517 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:53:05,517 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:53:05,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 14:53:05,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:53:05,730 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:53:05,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:53:05,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1794307392, now seen corresponding path program 2 times [2022-01-18 14:53:05,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:53:05,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419913293] [2022-01-18 14:53:05,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:53:05,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:53:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:53:05,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:53:05,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:53:05,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419913293] [2022-01-18 14:53:05,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419913293] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:53:05,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19942870] [2022-01-18 14:53:05,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:53:05,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:53:05,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:53:05,828 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:53:05,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 14:53:05,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:53:05,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:53:05,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:53:05,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:53:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:53:06,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:53:06,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:53:06,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19942870] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:53:06,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:53:06,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 6] total 11 [2022-01-18 14:53:06,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571132419] [2022-01-18 14:53:06,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:53:06,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:53:06,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:53:06,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:53:06,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:53:06,588 INFO L87 Difference]: Start difference. First operand 11738 states and 46405 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:53:07,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:53:07,437 INFO L93 Difference]: Finished difference Result 14654 states and 56991 transitions. [2022-01-18 14:53:07,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:53:07,437 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2022-01-18 14:53:07,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:53:07,473 INFO L225 Difference]: With dead ends: 14654 [2022-01-18 14:53:07,474 INFO L226 Difference]: Without dead ends: 14501 [2022-01-18 14:53:07,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 13 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:53:07,474 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 144 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 1578 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 1634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 14:53:07,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 275 Invalid, 1634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1578 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 14:53:07,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14501 states. [2022-01-18 14:53:07,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14501 to 12515. [2022-01-18 14:53:07,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12515 states, 12514 states have (on average 3.949656384848969) internal successors, (49426), 12514 states have internal predecessors, (49426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:53:07,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12515 states to 12515 states and 49426 transitions. [2022-01-18 14:53:07,715 INFO L78 Accepts]: Start accepts. Automaton has 12515 states and 49426 transitions. Word has length 29 [2022-01-18 14:53:07,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:53:07,715 INFO L470 AbstractCegarLoop]: Abstraction has 12515 states and 49426 transitions. [2022-01-18 14:53:07,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:53:07,715 INFO L276 IsEmpty]: Start isEmpty. Operand 12515 states and 49426 transitions. [2022-01-18 14:53:07,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:53:07,740 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:53:07,740 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:53:07,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 14:53:07,947 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,SelfDestructingSolverStorable13 [2022-01-18 14:53:07,947 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:53:07,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:53:07,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1574438962, now seen corresponding path program 3 times [2022-01-18 14:53:07,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:53:07,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667764091] [2022-01-18 14:53:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:53:07,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:53:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:53:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:53:08,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:53:08,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667764091] [2022-01-18 14:53:08,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667764091] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:53:08,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455077279] [2022-01-18 14:53:08,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:53:08,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:53:08,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:53:08,028 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:53:08,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 14:53:08,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 14:53:08,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:53:08,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:53:08,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:53:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:53:08,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:53:08,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:53:08,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455077279] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:53:08,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:53:08,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 6] total 12 [2022-01-18 14:53:08,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242192068] [2022-01-18 14:53:08,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:53:08,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:53:08,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:53:08,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:53:08,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:53:08,743 INFO L87 Difference]: Start difference. First operand 12515 states and 49426 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:53:09,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:53:09,568 INFO L93 Difference]: Finished difference Result 16013 states and 62264 transitions. [2022-01-18 14:53:09,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:53:09,568 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:53:09,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:53:09,610 INFO L225 Difference]: With dead ends: 16013 [2022-01-18 14:53:09,610 INFO L226 Difference]: Without dead ends: 15860 [2022-01-18 14:53:09,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 12 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:53:09,611 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 167 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:53:09,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 268 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1504 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:53:09,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15860 states. [2022-01-18 14:53:09,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15860 to 13539. [2022-01-18 14:53:09,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13539 states, 13538 states have (on average 3.9462993056581475) internal successors, (53425), 13538 states have internal predecessors, (53425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:53:09,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13539 states to 13539 states and 53425 transitions. [2022-01-18 14:53:09,874 INFO L78 Accepts]: Start accepts. Automaton has 13539 states and 53425 transitions. Word has length 29 [2022-01-18 14:53:09,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:53:09,874 INFO L470 AbstractCegarLoop]: Abstraction has 13539 states and 53425 transitions. [2022-01-18 14:53:09,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:53:09,875 INFO L276 IsEmpty]: Start isEmpty. Operand 13539 states and 53425 transitions. [2022-01-18 14:53:09,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:53:09,904 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:53:09,904 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:53:09,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-18 14:53:10,119 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,SelfDestructingSolverStorable14 [2022-01-18 14:53:10,119 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:53:10,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:53:10,120 INFO L85 PathProgramCache]: Analyzing trace with hash -969860962, now seen corresponding path program 4 times [2022-01-18 14:53:10,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:53:10,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70555788] [2022-01-18 14:53:10,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:53:10,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:53:10,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:53:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:53:10,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:53:10,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70555788] [2022-01-18 14:53:10,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70555788] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:53:10,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733246998] [2022-01-18 14:53:10,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:53:10,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:53:10,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:53:10,204 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:53:10,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 14:53:10,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:53:10,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:53:10,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:53:10,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2022-01-18 15:07:20,231 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 15:07:20,231 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 15:07:21,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2022-01-18 15:07:21,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-18 15:07:22,372 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (4 of 5 remaining) [2022-01-18 15:07:22,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-18 15:07:22,372 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. [2022-01-18 15:07:22,373 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (3 of 5 remaining) [2022-01-18 15:07:22,373 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (2 of 5 remaining) [2022-01-18 15:07:22,373 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (1 of 5 remaining) [2022-01-18 15:07:22,373 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION (0 of 5 remaining) [2022-01-18 15:07:22,376 INFO L732 BasicCegarLoop]: Path program histogram: [5, 4, 2, 2, 1, 1, 1] [2022-01-18 15:07:22,378 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 15:07:22,378 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 15:07:22,380 INFO L202 PluginConnector]: Adding new model exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 03:07:22 BasicIcfg [2022-01-18 15:07:22,380 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 15:07:22,380 INFO L158 Benchmark]: Toolchain (without parser) took 877832.23ms. Allocated memory was 352.3MB in the beginning and 3.4GB in the end (delta: 3.1GB). Free memory was 312.1MB in the beginning and 1.3GB in the end (delta: -938.0MB). Peak memory consumption was 2.3GB. Max. memory is 16.0GB. [2022-01-18 15:07:22,380 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 352.3MB. Free memory is still 313.2MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 15:07:22,381 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.74ms. Allocated memory is still 352.3MB. Free memory was 311.9MB in the beginning and 310.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 15:07:22,381 INFO L158 Benchmark]: Boogie Preprocessor took 11.77ms. Allocated memory is still 352.3MB. Free memory was 310.3MB in the beginning and 309.4MB in the end (delta: 921.9kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 15:07:22,381 INFO L158 Benchmark]: RCFGBuilder took 196.10ms. Allocated memory is still 352.3MB. Free memory was 309.4MB in the beginning and 299.8MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 15:07:22,381 INFO L158 Benchmark]: TraceAbstraction took 877589.71ms. Allocated memory was 352.3MB in the beginning and 3.4GB in the end (delta: 3.1GB). Free memory was 299.3MB in the beginning and 1.3GB in the end (delta: -950.8MB). Peak memory consumption was 2.2GB. Max. memory is 16.0GB. [2022-01-18 15:07:22,382 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13ms. Allocated memory is still 352.3MB. Free memory is still 313.2MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 26.74ms. Allocated memory is still 352.3MB. Free memory was 311.9MB in the beginning and 310.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 11.77ms. Allocated memory is still 352.3MB. Free memory was 310.3MB in the beginning and 309.4MB in the end (delta: 921.9kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 196.10ms. Allocated memory is still 352.3MB. Free memory was 309.4MB in the beginning and 299.8MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 877589.71ms. Allocated memory was 352.3MB in the beginning and 3.4GB in the end (delta: 3.1GB). Free memory was 299.3MB in the beginning and 1.3GB in the end (delta: -950.8MB). Peak memory consumption was 2.2GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 74 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 877.5s, OverallIterations: 16, TraceHistogramMax: 1, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.4s, AutomataDifference: 10.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.2s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1569 SdHoareTripleChecker+Valid, 8.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1569 mSDsluCounter, 2638 SdHoareTripleChecker+Invalid, 7.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4027 mSDsCounter, 460 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12262 IncrementalHoareTripleChecker+Invalid, 12722 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 460 mSolverCounterUnsat, 581 mSDtfsCounter, 12262 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 592 GetRequests, 404 SyntacticMatches, 90 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13539occurred in iteration=15, InterpolantAutomatonStates: 126, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.4s AutomataMinimizationTime, 15 MinimizatonAttempts, 21961 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 8.3s InterpolantComputationTime, 646 NumberOfCodeBlocks, 646 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 864 ConstructedInterpolants, 0 QuantifiedInterpolants, 16244 SizeOfPredicates, 32 NumberOfNonLiveVariables, 666 ConjunctsInSsa, 153 ConjunctsInUnsatCore, 33 InterpolantComputations, 6 PerfectInterpolantSequences, 21/54 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown