/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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 05:25:13,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 05:25:13,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 05:25:13,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-18 05:25:13,976 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-18 05:25:13,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-18 05:25:13,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-18 05:25:13,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-18 05:25:13,993 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-18 05:25:13,994 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-18 05:25:13,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-18 05:25:13,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-01-18 05:25:14,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 05:25:14,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 05:25:14,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 05:25:14,029 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-01-18 05:25:14,041 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 05:25:14,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 05:25:14,042 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 05:25:14,042 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 05:25:14,042 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 05:25:14,042 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 05:25:14,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 05:25:14,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 05:25:14,047 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 05:25:14,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 05:25:14,048 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 05:25:14,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 05:25:14,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 05:25:14,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 05:25:14,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 05:25:14,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 05:25:14,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 05:25:14,049 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 05:25:14,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 05:25:14,049 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 05:25:14,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 05:25:14,049 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 05:25:14,049 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 05:25:14,049 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 05:25:14,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 05:25:14,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 05:25:14,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 05:25:14,050 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 05:25:14,050 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 05:25:14,050 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 05:25:14,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 05:25:14,050 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 05:25:14,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 05:25:14,051 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 05:25:14,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 05:25:14,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 05:25:14,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 05:25:14,245 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 05:25:14,246 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 05:25:14,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-4.wvr.bpl [2022-01-18 05:25:14,247 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-4.wvr.bpl' [2022-01-18 05:25:14,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 05:25:14,267 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 05:25:14,268 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 05:25:14,268 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 05:25:14,268 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 05:25:14,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:25:14" (1/1) ... [2022-01-18 05:25:14,280 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:25:14" (1/1) ... [2022-01-18 05:25:14,285 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 05:25:14,286 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 05:25:14,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 05:25:14,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 05:25:14,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 05:25:14,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:25:14" (1/1) ... [2022-01-18 05:25:14,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:25:14" (1/1) ... [2022-01-18 05:25:14,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:25:14" (1/1) ... [2022-01-18 05:25:14,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:25:14" (1/1) ... [2022-01-18 05:25:14,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:25:14" (1/1) ... [2022-01-18 05:25:14,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:25:14" (1/1) ... [2022-01-18 05:25:14,297 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:25:14" (1/1) ... [2022-01-18 05:25:14,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 05:25:14,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 05:25:14,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 05:25:14,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 05:25:14,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:25:14" (1/1) ... [2022-01-18 05:25:14,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 05:25:14,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:25:14,329 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 05:25:14,346 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 05:25:14,359 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 05:25:14,359 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 05:25:14,359 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 05:25:14,359 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 05:25:14,359 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 05:25:14,359 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 05:25:14,360 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 05:25:14,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 05:25:14,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 05:25:14,360 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 05:25:14,360 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 05:25:14,360 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 05:25:14,360 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 05:25:14,389 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 05:25:14,390 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 05:25:14,509 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 05:25:14,517 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 05:25:14,517 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 05:25:14,519 INFO L202 PluginConnector]: Adding new model misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:25:14 BoogieIcfgContainer [2022-01-18 05:25:14,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 05:25:14,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 05:25:14,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 05:25:14,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 05:25:14,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:25:14" (1/2) ... [2022-01-18 05:25:14,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61988049 and model type misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 05:25:14, skipping insertion in model container [2022-01-18 05:25:14,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:25:14" (2/2) ... [2022-01-18 05:25:14,528 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-4.wvr.bpl [2022-01-18 05:25:14,531 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 05:25:14,531 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 05:25:14,531 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 05:25:14,531 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 05:25:14,553 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 05:25:14,589 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 05:25:14,595 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 05:25:14,595 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 05:25:14,604 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 31 transitions, 86 flow [2022-01-18 05:25:14,650 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 231 states, 230 states have (on average 2.9478260869565216) internal successors, (678), 230 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:14,653 INFO L276 IsEmpty]: Start isEmpty. Operand has 231 states, 230 states have (on average 2.9478260869565216) internal successors, (678), 230 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:14,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 05:25:14,665 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:25:14,666 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:25:14,666 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:25:14,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:25:14,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1616720246, now seen corresponding path program 1 times [2022-01-18 05:25:14,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:25:14,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59120160] [2022-01-18 05:25:14,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:25:14,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:25:14,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:25:14,787 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 05:25:14,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:25:14,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59120160] [2022-01-18 05:25:14,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59120160] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:25:14,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:25:14,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 05:25:14,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862540741] [2022-01-18 05:25:14,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:25:14,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 05:25:14,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:25:14,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 05:25:14,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 05:25:14,828 INFO L87 Difference]: Start difference. First operand has 231 states, 230 states have (on average 2.9478260869565216) internal successors, (678), 230 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:14,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:25:14,879 INFO L93 Difference]: Finished difference Result 273 states and 758 transitions. [2022-01-18 05:25:14,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 05:25:14,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 05:25:14,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:25:14,889 INFO L225 Difference]: With dead ends: 273 [2022-01-18 05:25:14,889 INFO L226 Difference]: Without dead ends: 173 [2022-01-18 05:25:14,890 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 05:25:14,893 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:25:14,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 35 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:25:14,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-18 05:25:14,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-01-18 05:25:14,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.7209302325581395) internal successors, (468), 172 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:14,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 468 transitions. [2022-01-18 05:25:14,961 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 468 transitions. Word has length 14 [2022-01-18 05:25:14,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:25:14,961 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 468 transitions. [2022-01-18 05:25:14,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:14,961 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 468 transitions. [2022-01-18 05:25:14,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 05:25:14,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:25:14,963 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:25:14,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 05:25:14,963 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:25:14,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:25:14,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1897997752, now seen corresponding path program 2 times [2022-01-18 05:25:14,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:25:14,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659237885] [2022-01-18 05:25:14,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:25:14,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:25:14,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:25:14,985 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 05:25:14,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:25:14,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659237885] [2022-01-18 05:25:14,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659237885] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:25:14,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:25:14,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 05:25:14,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548449781] [2022-01-18 05:25:14,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:25:14,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:25:14,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:25:14,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:25:14,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:25:14,988 INFO L87 Difference]: Start difference. First operand 173 states and 468 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:15,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:25:15,030 INFO L93 Difference]: Finished difference Result 310 states and 842 transitions. [2022-01-18 05:25:15,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 05:25:15,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 05:25:15,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:25:15,032 INFO L225 Difference]: With dead ends: 310 [2022-01-18 05:25:15,032 INFO L226 Difference]: Without dead ends: 228 [2022-01-18 05:25:15,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:25:15,033 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:25:15,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 39 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:25:15,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-01-18 05:25:15,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2022-01-18 05:25:15,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.748898678414097) internal successors, (624), 227 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:15,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 624 transitions. [2022-01-18 05:25:15,046 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 624 transitions. Word has length 14 [2022-01-18 05:25:15,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:25:15,047 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 624 transitions. [2022-01-18 05:25:15,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:15,047 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 624 transitions. [2022-01-18 05:25:15,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 05:25:15,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:25:15,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:25:15,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 05:25:15,049 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:25:15,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:25:15,049 INFO L85 PathProgramCache]: Analyzing trace with hash -666097446, now seen corresponding path program 1 times [2022-01-18 05:25:15,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:25:15,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66124613] [2022-01-18 05:25:15,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:25:15,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:25:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:25:15,064 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 05:25:15,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:25:15,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66124613] [2022-01-18 05:25:15,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66124613] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:25:15,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:25:15,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 05:25:15,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745453190] [2022-01-18 05:25:15,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:25:15,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 05:25:15,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:25:15,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 05:25:15,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 05:25:15,066 INFO L87 Difference]: Start difference. First operand 228 states and 624 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:15,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:25:15,082 INFO L93 Difference]: Finished difference Result 369 states and 981 transitions. [2022-01-18 05:25:15,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 05:25:15,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 05:25:15,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:25:15,084 INFO L225 Difference]: With dead ends: 369 [2022-01-18 05:25:15,085 INFO L226 Difference]: Without dead ends: 369 [2022-01-18 05:25:15,085 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 05:25:15,086 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 20 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:25:15,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 33 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:25:15,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-01-18 05:25:15,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 284. [2022-01-18 05:25:15,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.7597173144876326) internal successors, (781), 283 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:15,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 781 transitions. [2022-01-18 05:25:15,099 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 781 transitions. Word has length 18 [2022-01-18 05:25:15,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:25:15,100 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 781 transitions. [2022-01-18 05:25:15,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:15,100 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 781 transitions. [2022-01-18 05:25:15,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 05:25:15,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:25:15,101 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:25:15,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 05:25:15,102 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:25:15,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:25:15,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1626508092, now seen corresponding path program 1 times [2022-01-18 05:25:15,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:25:15,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817305912] [2022-01-18 05:25:15,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:25:15,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:25:15,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:25:15,116 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 05:25:15,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:25:15,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817305912] [2022-01-18 05:25:15,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817305912] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:25:15,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:25:15,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 05:25:15,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057466974] [2022-01-18 05:25:15,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:25:15,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 05:25:15,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:25:15,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 05:25:15,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 05:25:15,118 INFO L87 Difference]: Start difference. First operand 284 states and 781 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:15,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:25:15,132 INFO L93 Difference]: Finished difference Result 432 states and 1157 transitions. [2022-01-18 05:25:15,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 05:25:15,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 05:25:15,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:25:15,135 INFO L225 Difference]: With dead ends: 432 [2022-01-18 05:25:15,135 INFO L226 Difference]: Without dead ends: 432 [2022-01-18 05:25:15,135 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 05:25:15,136 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:25:15,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 35 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:25:15,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-01-18 05:25:15,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 348. [2022-01-18 05:25:15,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.7636887608069163) internal successors, (959), 347 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:15,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 959 transitions. [2022-01-18 05:25:15,166 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 959 transitions. Word has length 18 [2022-01-18 05:25:15,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:25:15,166 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 959 transitions. [2022-01-18 05:25:15,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:15,167 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 959 transitions. [2022-01-18 05:25:15,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:25:15,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:25:15,168 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:25:15,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 05:25:15,168 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:25:15,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:25:15,168 INFO L85 PathProgramCache]: Analyzing trace with hash 176081054, now seen corresponding path program 1 times [2022-01-18 05:25:15,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:25:15,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118431900] [2022-01-18 05:25:15,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:25:15,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:25:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:25:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:25:15,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:25:15,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118431900] [2022-01-18 05:25:15,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118431900] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:25:15,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057924995] [2022-01-18 05:25:15,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:25:15,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:25:15,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:25:15,204 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 05:25:15,205 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 05:25:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:25:15,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 05:25:15,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:25:15,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:25:15,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:25:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:25:15,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057924995] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:25:15,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:25:15,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-01-18 05:25:15,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036545220] [2022-01-18 05:25:15,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:25:15,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:25:15,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:25:15,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:25:15,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:25:15,405 INFO L87 Difference]: Start difference. First operand 348 states and 959 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:15,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:25:15,449 INFO L93 Difference]: Finished difference Result 665 states and 1852 transitions. [2022-01-18 05:25:15,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:25:15,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:25:15,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:25:15,451 INFO L225 Difference]: With dead ends: 665 [2022-01-18 05:25:15,451 INFO L226 Difference]: Without dead ends: 509 [2022-01-18 05:25:15,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 05:25:15,452 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 43 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:25:15,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 50 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:25:15,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-01-18 05:25:15,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 408. [2022-01-18 05:25:15,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.7764127764127764) internal successors, (1130), 407 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:15,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1130 transitions. [2022-01-18 05:25:15,464 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1130 transitions. Word has length 22 [2022-01-18 05:25:15,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:25:15,464 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1130 transitions. [2022-01-18 05:25:15,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:15,464 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1130 transitions. [2022-01-18 05:25:15,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:25:15,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:25:15,465 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:25:15,484 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 05:25:15,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:25:15,681 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:25:15,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:25:15,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1687278304, now seen corresponding path program 1 times [2022-01-18 05:25:15,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:25:15,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800415164] [2022-01-18 05:25:15,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:25:15,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:25:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:25:15,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:25:15,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:25:15,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800415164] [2022-01-18 05:25:15,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800415164] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:25:15,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142071641] [2022-01-18 05:25:15,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:25:15,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:25:15,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:25:15,724 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 05:25:15,725 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 05:25:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:25:15,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 05:25:15,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:25:15,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:25:15,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:25:15,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:25:15,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142071641] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:25:15,827 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:25:15,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-01-18 05:25:15,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132402915] [2022-01-18 05:25:15,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:25:15,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:25:15,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:25:15,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:25:15,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:25:15,828 INFO L87 Difference]: Start difference. First operand 408 states and 1130 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:15,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:25:15,875 INFO L93 Difference]: Finished difference Result 873 states and 2457 transitions. [2022-01-18 05:25:15,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:25:15,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:25:15,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:25:15,879 INFO L225 Difference]: With dead ends: 873 [2022-01-18 05:25:15,879 INFO L226 Difference]: Without dead ends: 717 [2022-01-18 05:25:15,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 05:25:15,880 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 41 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:25:15,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 57 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:25:15,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-01-18 05:25:15,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 697. [2022-01-18 05:25:15,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 2.8117816091954024) internal successors, (1957), 696 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:15,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1957 transitions. [2022-01-18 05:25:15,896 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1957 transitions. Word has length 22 [2022-01-18 05:25:15,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:25:15,896 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 1957 transitions. [2022-01-18 05:25:15,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:15,896 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1957 transitions. [2022-01-18 05:25:15,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 05:25:15,898 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:25:15,898 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:25:15,917 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 05:25:16,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-18 05:25:16,116 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:25:16,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:25:16,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1070606370, now seen corresponding path program 2 times [2022-01-18 05:25:16,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:25:16,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838302442] [2022-01-18 05:25:16,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:25:16,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:25:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:25:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:25:16,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:25:16,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838302442] [2022-01-18 05:25:16,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838302442] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:25:16,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:25:16,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 05:25:16,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652657715] [2022-01-18 05:25:16,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:25:16,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:25:16,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:25:16,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:25:16,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:25:16,141 INFO L87 Difference]: Start difference. First operand 697 states and 1957 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:16,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:25:16,167 INFO L93 Difference]: Finished difference Result 873 states and 2302 transitions. [2022-01-18 05:25:16,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 05:25:16,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 05:25:16,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:25:16,171 INFO L225 Difference]: With dead ends: 873 [2022-01-18 05:25:16,171 INFO L226 Difference]: Without dead ends: 873 [2022-01-18 05:25:16,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:25:16,174 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 40 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:25:16,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 61 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:25:16,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-01-18 05:25:16,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 671. [2022-01-18 05:25:16,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.662686567164179) internal successors, (1784), 670 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:16,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1784 transitions. [2022-01-18 05:25:16,191 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1784 transitions. Word has length 26 [2022-01-18 05:25:16,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:25:16,191 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 1784 transitions. [2022-01-18 05:25:16,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:16,192 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1784 transitions. [2022-01-18 05:25:16,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 05:25:16,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:25:16,194 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:25:16,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-18 05:25:16,195 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:25:16,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:25:16,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1535613852, now seen corresponding path program 2 times [2022-01-18 05:25:16,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:25:16,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953268976] [2022-01-18 05:25:16,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:25:16,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:25:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:25:16,216 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:25:16,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:25:16,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953268976] [2022-01-18 05:25:16,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953268976] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:25:16,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:25:16,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 05:25:16,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062430373] [2022-01-18 05:25:16,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:25:16,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:25:16,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:25:16,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:25:16,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:25:16,218 INFO L87 Difference]: Start difference. First operand 671 states and 1784 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:16,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:25:16,243 INFO L93 Difference]: Finished difference Result 803 states and 1991 transitions. [2022-01-18 05:25:16,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 05:25:16,245 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 05:25:16,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:25:16,249 INFO L225 Difference]: With dead ends: 803 [2022-01-18 05:25:16,249 INFO L226 Difference]: Without dead ends: 803 [2022-01-18 05:25:16,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:25:16,250 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 39 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:25:16,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 61 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:25:16,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-01-18 05:25:16,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 679. [2022-01-18 05:25:16,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 678 states have (on average 2.5250737463126844) internal successors, (1712), 678 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:16,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1712 transitions. [2022-01-18 05:25:16,263 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1712 transitions. Word has length 26 [2022-01-18 05:25:16,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:25:16,263 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 1712 transitions. [2022-01-18 05:25:16,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:16,263 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1712 transitions. [2022-01-18 05:25:16,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 05:25:16,265 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:25:16,265 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:25:16,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-18 05:25:16,265 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:25:16,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:25:16,265 INFO L85 PathProgramCache]: Analyzing trace with hash -71530008, now seen corresponding path program 1 times [2022-01-18 05:25:16,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:25:16,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688895035] [2022-01-18 05:25:16,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:25:16,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:25:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:25:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:25:16,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:25:16,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688895035] [2022-01-18 05:25:16,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688895035] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:25:16,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92992947] [2022-01-18 05:25:16,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:25:16,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:25:16,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:25:16,325 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 05:25:16,326 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 05:25:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:25:16,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 05:25:16,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:25:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:25:16,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:25:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:25:16,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92992947] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:25:16,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:25:16,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-01-18 05:25:16,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043937315] [2022-01-18 05:25:16,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:25:16,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 05:25:16,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:25:16,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 05:25:16,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-18 05:25:16,469 INFO L87 Difference]: Start difference. First operand 679 states and 1712 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:16,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:25:16,533 INFO L93 Difference]: Finished difference Result 1111 states and 2808 transitions. [2022-01-18 05:25:16,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 05:25:16,534 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 05:25:16,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:25:16,538 INFO L225 Difference]: With dead ends: 1111 [2022-01-18 05:25:16,538 INFO L226 Difference]: Without dead ends: 935 [2022-01-18 05:25:16,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-18 05:25:16,539 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 48 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:25:16,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 65 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:25:16,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2022-01-18 05:25:16,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 478. [2022-01-18 05:25:16,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 2.542976939203354) internal successors, (1213), 477 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:16,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1213 transitions. [2022-01-18 05:25:16,551 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1213 transitions. Word has length 30 [2022-01-18 05:25:16,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:25:16,551 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 1213 transitions. [2022-01-18 05:25:16,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:16,551 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1213 transitions. [2022-01-18 05:25:16,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 05:25:16,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:25:16,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:25:16,571 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 05:25:16,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:25:16,771 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:25:16,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:25:16,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1538147992, now seen corresponding path program 2 times [2022-01-18 05:25:16,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:25:16,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668177015] [2022-01-18 05:25:16,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:25:16,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:25:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:25:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:25:16,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:25:16,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668177015] [2022-01-18 05:25:16,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668177015] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:25:16,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664999428] [2022-01-18 05:25:16,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:25:16,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:25:16,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:25:16,806 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 05:25:16,807 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 05:25:16,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:25:16,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:25:16,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 05:25:16,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:25:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:25:16,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:25:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:25:16,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664999428] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:25:16,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:25:16,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-01-18 05:25:16,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582833701] [2022-01-18 05:25:16,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:25:16,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 05:25:16,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:25:16,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 05:25:16,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 05:25:16,930 INFO L87 Difference]: Start difference. First operand 478 states and 1213 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:16,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:25:16,976 INFO L93 Difference]: Finished difference Result 458 states and 1138 transitions. [2022-01-18 05:25:16,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 05:25:16,976 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 05:25:16,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:25:16,977 INFO L225 Difference]: With dead ends: 458 [2022-01-18 05:25:16,977 INFO L226 Difference]: Without dead ends: 0 [2022-01-18 05:25:16,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-18 05:25:16,977 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:25:16,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 36 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:25:16,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-18 05:25:16,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-18 05:25:16,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:16,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-18 05:25:16,981 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2022-01-18 05:25:16,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:25:16,982 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-18 05:25:16,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:25:16,982 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-18 05:25:16,982 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-18 05:25:16,984 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 05:25:16,984 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 05:25:16,985 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 05:25:16,985 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 05:25:17,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 05:25:17,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:25:17,198 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1] [2022-01-18 05:25:17,199 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 05:25:17,199 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 05:25:17,201 INFO L202 PluginConnector]: Adding new model misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 05:25:17 BasicIcfg [2022-01-18 05:25:17,201 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 05:25:17,201 INFO L158 Benchmark]: Toolchain (without parser) took 2934.77ms. Allocated memory is still 367.0MB. Free memory was 328.3MB in the beginning and 166.9MB in the end (delta: 161.4MB). Peak memory consumption was 164.3MB. Max. memory is 16.0GB. [2022-01-18 05:25:17,202 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.09ms. Allocated memory is still 367.0MB. Free memory is still 329.4MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 05:25:17,202 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.47ms. Allocated memory is still 367.0MB. Free memory was 328.3MB in the beginning and 326.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 05:25:17,202 INFO L158 Benchmark]: Boogie Preprocessor took 11.25ms. Allocated memory is still 367.0MB. Free memory was 326.6MB in the beginning and 325.7MB in the end (delta: 901.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 05:25:17,202 INFO L158 Benchmark]: RCFGBuilder took 218.60ms. Allocated memory is still 367.0MB. Free memory was 325.7MB in the beginning and 316.8MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 05:25:17,202 INFO L158 Benchmark]: TraceAbstraction took 2681.13ms. Allocated memory is still 367.0MB. Free memory was 316.3MB in the beginning and 166.9MB in the end (delta: 149.4MB). Peak memory consumption was 151.7MB. Max. memory is 16.0GB. [2022-01-18 05:25:17,203 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 0.09ms. Allocated memory is still 367.0MB. Free memory is still 329.4MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 18.47ms. Allocated memory is still 367.0MB. Free memory was 328.3MB in the beginning and 326.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 11.25ms. Allocated memory is still 367.0MB. Free memory was 326.6MB in the beginning and 325.7MB in the end (delta: 901.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 218.60ms. Allocated memory is still 367.0MB. Free memory was 325.7MB in the beginning and 316.8MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 2681.13ms. Allocated memory is still 367.0MB. Free memory was 316.3MB in the beginning and 166.9MB in the end (delta: 149.4MB). Peak memory consumption was 151.7MB. 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 - PositiveResult [Line: 62]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 48 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 2.6s, OverallIterations: 10, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 338 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 338 mSDsluCounter, 472 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 358 mSDsCounter, 82 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 356 IncrementalHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 82 mSolverCounterUnsat, 204 mSDtfsCounter, 356 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 253 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=697occurred in iteration=6, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 1073 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 324 NumberOfCodeBlocks, 324 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 410 ConstructedInterpolants, 0 QuantifiedInterpolants, 800 SizeOfPredicates, 4 NumberOfNonLiveVariables, 212 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 85/118 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-01-18 05:25:17,234 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 Received shutdown request...