/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-POR-NewStatesSleepPersistent-NoLbe-Lockstep.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-07 18:49:59,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-07 18:49:59,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-07 18:49:59,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-07 18:49:59,836 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-POR-NewStatesSleepPersistent-NoLbe-Lockstep.epf [2021-08-07 18:49:59,873 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-07 18:49:59,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-07 18:49:59,873 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-07 18:49:59,874 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-07 18:49:59,877 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-07 18:49:59,877 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-07 18:49:59,877 INFO L138 SettingsManager]: * Use SBE=true [2021-08-07 18:49:59,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-07 18:49:59,877 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-07 18:49:59,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-07 18:49:59,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-07 18:49:59,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-07 18:49:59,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-07 18:49:59,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-07 18:49:59,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-07 18:49:59,879 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-07 18:49:59,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-07 18:49:59,879 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-07 18:49:59,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-07 18:49:59,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-07 18:49:59,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-07 18:49:59,880 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-07 18:49:59,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-07 18:49:59,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-07 18:49:59,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-07 18:49:59,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-07 18:49:59,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-07 18:49:59,881 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-07 18:49:59,881 INFO L138 SettingsManager]: * DFS Order used in POR=PSEUDO_LOCKSTEP [2021-08-07 18:49:59,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-07 18:49:59,881 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-07 18:49:59,881 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2021-08-07 18:49:59,881 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-07 18:49:59,882 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES [2021-08-07 18:49:59,882 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-07 18:50:00,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-07 18:50:00,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-07 18:50:00,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-07 18:50:00,207 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-07 18:50:00,208 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-07 18:50:00,209 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq.wvr.bpl [2021-08-07 18:50:00,209 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq.wvr.bpl' [2021-08-07 18:50:00,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-07 18:50:00,241 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-07 18:50:00,243 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-07 18:50:00,243 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-07 18:50:00,244 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-07 18:50:00,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.08 06:50:00" (1/1) ... [2021-08-07 18:50:00,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.08 06:50:00" (1/1) ... [2021-08-07 18:50:00,275 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-07 18:50:00,277 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-07 18:50:00,277 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-07 18:50:00,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-07 18:50:00,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.08 06:50:00" (1/1) ... [2021-08-07 18:50:00,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.08 06:50:00" (1/1) ... [2021-08-07 18:50:00,285 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.08 06:50:00" (1/1) ... [2021-08-07 18:50:00,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.08 06:50:00" (1/1) ... [2021-08-07 18:50:00,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.08 06:50:00" (1/1) ... [2021-08-07 18:50:00,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.08 06:50:00" (1/1) ... [2021-08-07 18:50:00,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.08 06:50:00" (1/1) ... [2021-08-07 18:50:00,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-07 18:50:00,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-07 18:50:00,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-07 18:50:00,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-07 18:50:00,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.08 06:50:00" (1/1) ... [2021-08-07 18:50:00,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-07 18:50:00,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-07 18:50:00,330 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) [2021-08-07 18:50:00,333 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 [2021-08-07 18:50:00,362 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-07 18:50:00,362 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-07 18:50:00,362 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-07 18:50:00,362 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-07 18:50:00,362 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-07 18:50:00,363 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-07 18:50:00,363 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-07 18:50:00,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-07 18:50:00,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-07 18:50:00,364 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-07 18:50:00,572 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-07 18:50:00,572 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-07 18:50:00,574 INFO L202 PluginConnector]: Adding new model dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 06:50:00 BoogieIcfgContainer [2021-08-07 18:50:00,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-07 18:50:00,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-07 18:50:00,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-07 18:50:00,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-07 18:50:00,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.08 06:50:00" (1/2) ... [2021-08-07 18:50:00,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5246880d and model type dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 06:50:00, skipping insertion in model container [2021-08-07 18:50:00,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 06:50:00" (2/2) ... [2021-08-07 18:50:00,581 INFO L111 eAbstractionObserver]: Analyzing ICFG dec-subseq.wvr.bpl [2021-08-07 18:50:00,603 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-07 18:50:00,603 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-07 18:50:00,603 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-07 18:50:00,603 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-07 18:50:00,648 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-07 18:50:00,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-08-07 18:50:00,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-07 18:50:00,689 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-08-07 18:50:00,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2021-08-07 18:50:00,712 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-07 18:50:00,720 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, mConcurrency=PARTIAL_ORDER_FA, 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 [2021-08-07 18:50:00,720 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-07 18:50:00,871 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-07 18:50:00,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-07 18:50:00,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1823728210, now seen corresponding path program 1 times [2021-08-07 18:50:00,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-07 18:50:00,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783414933] [2021-08-07 18:50:00,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-07 18:50:00,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-07 18:50:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-07 18:50:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-07 18:50:01,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-07 18:50:01,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783414933] [2021-08-07 18:50:01,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783414933] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-07 18:50:01,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-07 18:50:01,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-07 18:50:01,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786118455] [2021-08-07 18:50:01,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-07 18:50:01,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-07 18:50:01,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-07 18:50:01,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-07 18:50:01,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-07 18:50:01,096 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-08-07 18:50:01,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-07 18:50:01,097 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-08-07 18:50:01,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-07 18:50:01,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-07 18:50:01,160 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-07 18:50:01,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-07 18:50:01,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1337102076, now seen corresponding path program 2 times [2021-08-07 18:50:01,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-07 18:50:01,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403867661] [2021-08-07 18:50:01,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-07 18:50:01,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-07 18:50:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-07 18:50:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-07 18:50:01,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-07 18:50:01,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403867661] [2021-08-07 18:50:01,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403867661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-07 18:50:01,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323888782] [2021-08-07 18:50:01,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-07 18:50:01,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-07 18:50:01,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-07 18:50:01,407 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) [2021-08-07 18:50:01,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-07 18:50:01,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-07 18:50:01,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-07 18:50:01,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-07 18:50:01,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-07 18:50:01,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-07 18:50:01,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-07 18:50:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-07 18:50:01,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323888782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-07 18:50:01,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-07 18:50:01,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-07 18:50:01,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734024120] [2021-08-07 18:50:01,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-07 18:50:01,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-07 18:50:01,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-07 18:50:01,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-07 18:50:01,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-07 18:50:01,934 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-08-07 18:50:01,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-07 18:50:01,935 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-08-07 18:50:01,935 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-08-07 18:50:02,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-07 18:50:02,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-07 18:50:02,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-07 18:50:02,277 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,SelfDestructingSolverStorable1 [2021-08-07 18:50:02,277 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-07 18:50:02,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-07 18:50:02,278 INFO L82 PathProgramCache]: Analyzing trace with hash -2145188391, now seen corresponding path program 3 times [2021-08-07 18:50:02,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-07 18:50:02,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955503464] [2021-08-07 18:50:02,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-07 18:50:02,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-07 18:50:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-07 18:50:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-07 18:50:02,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-07 18:50:02,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955503464] [2021-08-07 18:50:02,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955503464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-07 18:50:02,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998935262] [2021-08-07 18:50:02,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-07 18:50:02,343 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-07 18:50:02,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-07 18:50:02,344 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) [2021-08-07 18:50:02,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-07 18:50:02,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-07 18:50:02,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-07 18:50:02,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-07 18:50:02,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-07 18:50:02,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-07 18:50:02,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998935262] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-07 18:50:02,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-07 18:50:02,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-08-07 18:50:02,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535855434] [2021-08-07 18:50:02,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-07 18:50:02,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-07 18:50:02,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-07 18:50:02,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-07 18:50:02,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-07 18:50:02,548 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-08-07 18:50:02,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-07 18:50:02,548 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-08-07 18:50:02,548 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 10 states. [2021-08-07 18:50:02,548 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-08-07 18:50:02,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-07 18:50:02,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-07 18:50:02,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-07 18:50:02,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-07 18:50:02,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-07 18:50:02,801 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-07 18:50:02,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-07 18:50:02,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1691128838, now seen corresponding path program 4 times [2021-08-07 18:50:02,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-07 18:50:02,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901809547] [2021-08-07 18:50:02,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-07 18:50:02,803 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-07 18:50:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-07 18:50:02,932 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-08-07 18:50:02,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-07 18:50:02,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901809547] [2021-08-07 18:50:02,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901809547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-07 18:50:02,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840605553] [2021-08-07 18:50:02,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-07 18:50:02,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-07 18:50:02,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-07 18:50:02,937 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) [2021-08-07 18:50:02,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-07 18:50:03,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-07 18:50:03,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-07 18:50:03,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-07 18:50:03,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-07 18:50:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-08-07 18:50:03,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840605553] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-07 18:50:03,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-07 18:50:03,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-08-07 18:50:03,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501531597] [2021-08-07 18:50:03,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-07 18:50:03,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-07 18:50:03,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-07 18:50:03,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-07 18:50:03,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-07 18:50:03,310 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-08-07 18:50:03,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-07 18:50:03,310 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-08-07 18:50:03,311 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 10 states. [2021-08-07 18:50:03,311 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-08-07 18:50:03,311 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-08-07 18:50:03,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-07 18:50:03,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-07 18:50:03,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-07 18:50:03,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-07 18:50:03,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-07 18:50:03,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-07 18:50:03,561 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-07 18:50:03,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-07 18:50:03,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1824110057, now seen corresponding path program 5 times [2021-08-07 18:50:03,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-07 18:50:03,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609561729] [2021-08-07 18:50:03,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-07 18:50:03,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-07 18:50:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-07 18:50:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-07 18:50:03,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-07 18:50:03,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609561729] [2021-08-07 18:50:03,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609561729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-07 18:50:03,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175431042] [2021-08-07 18:50:03,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-07 18:50:03,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-07 18:50:03,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-07 18:50:03,979 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-07 18:50:03,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-07 18:50:04,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-07 18:50:04,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-07 18:50:04,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-07 18:50:04,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-07 18:50:04,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-07 18:50:04,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-08-07 18:50:04,929 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-07 18:50:04,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 19 [2021-08-07 18:50:05,009 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-07 18:50:05,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175431042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-07 18:50:05,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-07 18:50:05,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 22 [2021-08-07 18:50:05,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470671982] [2021-08-07 18:50:05,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-07 18:50:05,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-07 18:50:05,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-07 18:50:05,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-08-07 18:50:05,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-07 18:50:05,012 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-08-07 18:50:05,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-07 18:50:05,012 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-08-07 18:50:05,012 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 10 states. [2021-08-07 18:50:05,012 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-08-07 18:50:05,012 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2021-08-07 18:50:05,012 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-08-07 18:50:05,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-07 18:50:05,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-07 18:50:05,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-07 18:50:05,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-07 18:50:05,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-07 18:50:05,551 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-07 18:50:05,552 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-07 18:50:05,552 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-07 18:50:05,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-07 18:50:05,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-07 18:50:05,783 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-07 18:50:05,783 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-07 18:50:05,785 INFO L202 PluginConnector]: Adding new model dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.08 06:50:05 BasicIcfg [2021-08-07 18:50:05,785 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-07 18:50:05,787 INFO L168 Benchmark]: Toolchain (without parser) took 5544.75 ms. Allocated memory was 181.4 MB in the beginning and 218.1 MB in the end (delta: 36.7 MB). Free memory was 161.8 MB in the beginning and 103.3 MB in the end (delta: 58.5 MB). Peak memory consumption was 95.8 MB. Max. memory is 8.0 GB. [2021-08-07 18:50:05,788 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 181.4 MB. Free memory is still 162.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-07 18:50:05,788 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.59 ms. Allocated memory is still 181.4 MB. Free memory was 161.7 MB in the beginning and 160.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-07 18:50:05,788 INFO L168 Benchmark]: Boogie Preprocessor took 19.07 ms. Allocated memory is still 181.4 MB. Free memory was 160.3 MB in the beginning and 159.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-07 18:50:05,788 INFO L168 Benchmark]: RCFGBuilder took 276.92 ms. Allocated memory is still 181.4 MB. Free memory was 159.3 MB in the beginning and 145.9 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-07 18:50:05,788 INFO L168 Benchmark]: TraceAbstraction took 5209.22 ms. Allocated memory was 181.4 MB in the beginning and 218.1 MB in the end (delta: 36.7 MB). Free memory was 145.5 MB in the beginning and 103.3 MB in the end (delta: 42.2 MB). Peak memory consumption was 79.0 MB. Max. memory is 8.0 GB. [2021-08-07 18:50:05,788 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 0.18 ms. Allocated memory is still 181.4 MB. Free memory is still 162.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 32.59 ms. Allocated memory is still 181.4 MB. Free memory was 161.7 MB in the beginning and 160.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.07 ms. Allocated memory is still 181.4 MB. Free memory was 160.3 MB in the beginning and 159.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 276.92 ms. Allocated memory is still 181.4 MB. Free memory was 159.3 MB in the beginning and 145.9 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5209.22 ms. Allocated memory was 181.4 MB in the beginning and 218.1 MB in the end (delta: 36.7 MB). Free memory was 145.5 MB in the beginning and 103.3 MB in the end (delta: 42.2 MB). Peak memory consumption was 79.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 896, positive: 709, positive conditional: 517, positive unconditional: 192, negative: 187, negative conditional: 182, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 746, positive: 709, positive conditional: 517, positive unconditional: 192, negative: 37, negative conditional: 32, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 746, positive: 709, positive conditional: 517, positive unconditional: 192, negative: 37, negative conditional: 32, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 885, positive: 709, positive conditional: 491, positive unconditional: 218, negative: 176, negative conditional: 139, negative unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 885, positive: 709, positive conditional: 399, positive unconditional: 310, negative: 176, negative conditional: 106, negative unconditional: 70, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 885, positive: 709, positive conditional: 399, positive unconditional: 310, negative: 176, negative conditional: 106, negative unconditional: 70, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 206, positive: 176, positive conditional: 15, positive unconditional: 161, negative: 30, negative conditional: 25, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 206, positive: 157, positive conditional: 0, positive unconditional: 157, negative: 49, negative conditional: 0, negative unconditional: 49, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 49, positive: 19, positive conditional: 15, positive unconditional: 4, negative: 30, negative conditional: 25, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 152, positive: 80, positive conditional: 28, positive unconditional: 51, negative: 73, negative conditional: 50, negative unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 885, positive: 533, positive conditional: 384, positive unconditional: 149, negative: 146, negative conditional: 81, negative unconditional: 65, unknown: 206, unknown conditional: 40, unknown unconditional: 166] , Statistics on independence cache: Total cache size (in pairs): 206, Positive cache size: 176, Positive conditional cache size: 15, Positive unconditional cache size: 161, Negative cache size: 30, Negative conditional cache size: 25, Negative unconditional cache size: 5, Eliminated conditions: 125, Maximal queried relation: 5, Independence queries for same thread: 150 - StatisticsResult: Persistent set benchmarks Persistent set computation time[ms]: 101, Number of persistent set computation: 31, Number of trivial persistent sets: 13, Underlying independence relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 197, positive: 192, positive conditional: 0, positive unconditional: 192, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 896, positive: 709, positive conditional: 517, positive unconditional: 192, negative: 187, negative conditional: 182, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 746, positive: 709, positive conditional: 517, positive unconditional: 192, negative: 37, negative conditional: 32, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 746, positive: 709, positive conditional: 517, positive unconditional: 192, negative: 37, negative conditional: 32, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 885, positive: 709, positive conditional: 491, positive unconditional: 218, negative: 176, negative conditional: 139, negative unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 885, positive: 709, positive conditional: 399, positive unconditional: 310, negative: 176, negative conditional: 106, negative unconditional: 70, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 885, positive: 709, positive conditional: 399, positive unconditional: 310, negative: 176, negative conditional: 106, negative unconditional: 70, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 206, positive: 176, positive conditional: 15, positive unconditional: 161, negative: 30, negative conditional: 25, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 206, positive: 157, positive conditional: 0, positive unconditional: 157, negative: 49, negative conditional: 0, negative unconditional: 49, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 49, positive: 19, positive conditional: 15, positive unconditional: 4, negative: 30, negative conditional: 25, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 152, positive: 80, positive conditional: 28, positive unconditional: 51, negative: 73, negative conditional: 50, negative unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 885, positive: 533, positive conditional: 384, positive unconditional: 149, negative: 146, negative conditional: 81, negative unconditional: 65, unknown: 206, unknown conditional: 40, unknown unconditional: 166] , Statistics on independence cache: Total cache size (in pairs): 206, Positive cache size: 176, Positive conditional cache size: 15, Positive unconditional cache size: 161, Negative cache size: 30, Negative conditional cache size: 25, Negative unconditional cache size: 5, Eliminated conditions: 125, Maximal queried relation: 5, Independence queries for same thread: 150 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms 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 for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 5099.0ms, OverallIterations: 5, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.6ms, PartialOrderReductionTime: 939.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=0occurred in iteration=0, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 38.4ms SsaConstructionTime, 132.4ms SatisfiabilityAnalysisTime, 2725.4ms InterpolantComputationTime, 279 NumberOfCodeBlocks, 279 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 270 ConstructedInterpolants, 10 QuantifiedInterpolants, 1335 SizeOfPredicates, 17 NumberOfNonLiveVariables, 272 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 105/144 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! [2021-08-07 18:50:05,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Forceful destruction successful, exit code 0 [2021-08-07 18:50:06,015 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...