/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/parallel-sum-equiv.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 05:26:18,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 05:26:18,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 05:26:18,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 05:26:18,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 05:26:18,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 05:26:18,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 05:26:18,965 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 05:26:18,989 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 05:26:18,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 05:26:18,990 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 05:26:18,990 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 05:26:18,991 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 05:26:18,991 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 05:26:18,991 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 05:26:18,991 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 05:26:18,991 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 05:26:18,991 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 05:26:18,992 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 05:26:18,992 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 05:26:18,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 05:26:18,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 05:26:18,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 05:26:18,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 05:26:18,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 05:26:18,993 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 05:26:18,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 05:26:18,993 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 05:26:18,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 05:26:18,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 05:26:18,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 05:26:18,993 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 05:26:18,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 05:26:18,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 05:26:18,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 05:26:18,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 05:26:18,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 05:26:18,994 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 05:26:18,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 05:26:18,994 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 05:26:18,994 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 05:26:18,994 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 05:26:19,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 05:26:19,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 05:26:19,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 05:26:19,191 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 05:26:19,192 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 05:26:19,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl [2022-01-18 05:26:19,193 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl' [2022-01-18 05:26:19,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 05:26:19,216 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 05:26:19,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 05:26:19,217 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 05:26:19,217 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 05:26:19,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:26:19" (1/1) ... [2022-01-18 05:26:19,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:26:19" (1/1) ... [2022-01-18 05:26:19,234 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 05:26:19,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 05:26:19,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 05:26:19,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 05:26:19,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 05:26:19,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:26:19" (1/1) ... [2022-01-18 05:26:19,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:26:19" (1/1) ... [2022-01-18 05:26:19,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:26:19" (1/1) ... [2022-01-18 05:26:19,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:26:19" (1/1) ... [2022-01-18 05:26:19,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:26:19" (1/1) ... [2022-01-18 05:26:19,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:26:19" (1/1) ... [2022-01-18 05:26:19,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:26:19" (1/1) ... [2022-01-18 05:26:19,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 05:26:19,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 05:26:19,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 05:26:19,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 05:26:19,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:26:19" (1/1) ... [2022-01-18 05:26:19,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 05:26:19,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:19,278 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 05:26:19,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 05:26:19,306 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 05:26:19,306 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 05:26:19,306 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 05:26:19,306 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 05:26:19,306 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 05:26:19,306 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 05:26:19,307 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 05:26:19,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 05:26:19,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 05:26:19,307 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 05:26:19,307 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 05:26:19,307 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 05:26:19,307 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-01-18 05:26:19,307 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-01-18 05:26:19,307 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-01-18 05:26:19,308 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 05:26:19,344 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 05:26:19,346 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 05:26:19,453 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 05:26:19,475 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 05:26:19,475 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-18 05:26:19,475 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-01-18 05:26:19,476 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2022-01-18 05:26:19,476 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2022-01-18 05:26:19,477 INFO L202 PluginConnector]: Adding new model parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:26:19 BoogieIcfgContainer [2022-01-18 05:26:19,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 05:26:19,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 05:26:19,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 05:26:19,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 05:26:19,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:26:19" (1/2) ... [2022-01-18 05:26:19,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e8cb3ec and model type parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 05:26:19, skipping insertion in model container [2022-01-18 05:26:19,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:26:19" (2/2) ... [2022-01-18 05:26:19,484 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-equiv.wvr.bpl [2022-01-18 05:26:19,491 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 05:26:19,491 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 05:26:19,491 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 05:26:19,491 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 05:26:19,541 INFO L148 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-01-18 05:26:19,622 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 05:26:19,626 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 05:26:19,626 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-01-18 05:26:19,634 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 110 flow [2022-01-18 05:26:19,674 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 103 states, 102 states have (on average 2.911764705882353) internal successors, (297), 102 states have internal predecessors, (297), 0 states have call successors, (0), 0 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 05:26:19,676 INFO L276 IsEmpty]: Start isEmpty. Operand has 103 states, 102 states have (on average 2.911764705882353) internal successors, (297), 102 states have internal predecessors, (297), 0 states have call successors, (0), 0 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 05:26:19,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 05:26:19,684 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:19,685 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:26:19,686 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:19,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:19,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1639101113, now seen corresponding path program 1 times [2022-01-18 05:26:19,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:19,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010941908] [2022-01-18 05:26:19,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:19,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:19,829 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 05:26:19,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:19,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010941908] [2022-01-18 05:26:19,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010941908] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:26:19,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:26:19,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 05:26:19,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940612776] [2022-01-18 05:26:19,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:26:19,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:26:19,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:19,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:26:19,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:26:19,856 INFO L87 Difference]: Start difference. First operand has 103 states, 102 states have (on average 2.911764705882353) internal successors, (297), 102 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 05:26:19,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:19,958 INFO L93 Difference]: Finished difference Result 253 states and 745 transitions. [2022-01-18 05:26:19,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 05:26:19,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-01-18 05:26:19,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:19,968 INFO L225 Difference]: With dead ends: 253 [2022-01-18 05:26:19,968 INFO L226 Difference]: Without dead ends: 247 [2022-01-18 05:26:19,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:26:19,971 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 27 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:19,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 9 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:26:20,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-01-18 05:26:20,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 143. [2022-01-18 05:26:20,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.936619718309859) internal successors, (417), 142 states have internal predecessors, (417), 0 states have call successors, (0), 0 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 05:26:20,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 417 transitions. [2022-01-18 05:26:20,038 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 417 transitions. Word has length 16 [2022-01-18 05:26:20,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:20,039 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 417 transitions. [2022-01-18 05:26:20,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 05:26:20,039 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 417 transitions. [2022-01-18 05:26:20,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 05:26:20,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:20,040 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:26:20,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 05:26:20,041 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:20,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:20,041 INFO L85 PathProgramCache]: Analyzing trace with hash -852565589, now seen corresponding path program 2 times [2022-01-18 05:26:20,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:20,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149874616] [2022-01-18 05:26:20,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:20,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:20,082 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 05:26:20,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:20,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149874616] [2022-01-18 05:26:20,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149874616] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:26:20,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:26:20,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 05:26:20,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236314031] [2022-01-18 05:26:20,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:26:20,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:26:20,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:20,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:26:20,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:26:20,084 INFO L87 Difference]: Start difference. First operand 143 states and 417 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 05:26:20,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:20,157 INFO L93 Difference]: Finished difference Result 262 states and 765 transitions. [2022-01-18 05:26:20,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 05:26:20,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-01-18 05:26:20,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:20,159 INFO L225 Difference]: With dead ends: 262 [2022-01-18 05:26:20,159 INFO L226 Difference]: Without dead ends: 256 [2022-01-18 05:26:20,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:26:20,160 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:20,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 15 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:26:20,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-01-18 05:26:20,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 145. [2022-01-18 05:26:20,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.923611111111111) internal successors, (421), 144 states have internal predecessors, (421), 0 states have call successors, (0), 0 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 05:26:20,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 421 transitions. [2022-01-18 05:26:20,170 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 421 transitions. Word has length 16 [2022-01-18 05:26:20,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:20,171 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 421 transitions. [2022-01-18 05:26:20,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 05:26:20,171 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 421 transitions. [2022-01-18 05:26:20,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 05:26:20,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:20,172 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 05:26:20,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 05:26:20,172 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:20,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:20,173 INFO L85 PathProgramCache]: Analyzing trace with hash 105140105, now seen corresponding path program 1 times [2022-01-18 05:26:20,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:20,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421465471] [2022-01-18 05:26:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:20,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:20,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:20,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:20,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421465471] [2022-01-18 05:26:20,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421465471] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:20,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893349719] [2022-01-18 05:26:20,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:20,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:20,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:20,206 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 05:26:20,207 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 05:26:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:20,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 05:26:20,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:20,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:20,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893349719] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:20,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:20,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 05:26:20,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212423099] [2022-01-18 05:26:20,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:20,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 05:26:20,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:20,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 05:26:20,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 05:26:20,388 INFO L87 Difference]: Start difference. First operand 145 states and 421 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 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 05:26:20,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:20,477 INFO L93 Difference]: Finished difference Result 199 states and 578 transitions. [2022-01-18 05:26:20,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:26:20,478 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 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 05:26:20,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:20,480 INFO L225 Difference]: With dead ends: 199 [2022-01-18 05:26:20,480 INFO L226 Difference]: Without dead ends: 199 [2022-01-18 05:26:20,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:26:20,483 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:20,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 42 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:26:20,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-18 05:26:20,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 149. [2022-01-18 05:26:20,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 3.0067567567567566) internal successors, (445), 148 states have internal predecessors, (445), 0 states have call successors, (0), 0 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 05:26:20,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 445 transitions. [2022-01-18 05:26:20,504 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 445 transitions. Word has length 18 [2022-01-18 05:26:20,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:20,504 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 445 transitions. [2022-01-18 05:26:20,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 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 05:26:20,504 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 445 transitions. [2022-01-18 05:26:20,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 05:26:20,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:20,505 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 05:26:20,525 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 05:26:20,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:20,706 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:20,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:20,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1032435817, now seen corresponding path program 1 times [2022-01-18 05:26:20,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:20,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454333486] [2022-01-18 05:26:20,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:20,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:20,734 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 05:26:20,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:20,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454333486] [2022-01-18 05:26:20,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454333486] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:26:20,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:26:20,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 05:26:20,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951730909] [2022-01-18 05:26:20,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:26:20,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:26:20,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:20,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:26:20,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:26:20,736 INFO L87 Difference]: Start difference. First operand 149 states and 445 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:20,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:20,851 INFO L93 Difference]: Finished difference Result 246 states and 702 transitions. [2022-01-18 05:26:20,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 05:26:20,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:20,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:20,853 INFO L225 Difference]: With dead ends: 246 [2022-01-18 05:26:20,853 INFO L226 Difference]: Without dead ends: 214 [2022-01-18 05:26:20,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:26:20,853 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 64 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:20,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 41 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:26:20,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-18 05:26:20,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 164. [2022-01-18 05:26:20,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.901840490797546) internal successors, (473), 163 states have internal predecessors, (473), 0 states have call successors, (0), 0 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 05:26:20,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 473 transitions. [2022-01-18 05:26:20,859 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 473 transitions. Word has length 18 [2022-01-18 05:26:20,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:20,859 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 473 transitions. [2022-01-18 05:26:20,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:20,859 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 473 transitions. [2022-01-18 05:26:20,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 05:26:20,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:20,860 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 05:26:20,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 05:26:20,860 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:20,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:20,861 INFO L85 PathProgramCache]: Analyzing trace with hash 973094452, now seen corresponding path program 1 times [2022-01-18 05:26:20,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:20,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006638661] [2022-01-18 05:26:20,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:20,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:20,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:20,894 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 05:26:20,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:20,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006638661] [2022-01-18 05:26:20,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006638661] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:26:20,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:26:20,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 05:26:20,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777407187] [2022-01-18 05:26:20,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:26:20,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 05:26:20,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:20,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 05:26:20,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 05:26:20,896 INFO L87 Difference]: Start difference. First operand 164 states and 473 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 05:26:20,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:20,935 INFO L93 Difference]: Finished difference Result 153 states and 416 transitions. [2022-01-18 05:26:20,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 05:26:20,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 05:26:20,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:20,936 INFO L225 Difference]: With dead ends: 153 [2022-01-18 05:26:20,936 INFO L226 Difference]: Without dead ends: 137 [2022-01-18 05:26:20,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 05:26:20,937 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:20,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 12 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:26:20,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-18 05:26:20,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2022-01-18 05:26:20,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.7954545454545454) internal successors, (369), 132 states have internal predecessors, (369), 0 states have call successors, (0), 0 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 05:26:20,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 369 transitions. [2022-01-18 05:26:20,941 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 369 transitions. Word has length 18 [2022-01-18 05:26:20,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:20,941 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 369 transitions. [2022-01-18 05:26:20,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 05:26:20,942 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 369 transitions. [2022-01-18 05:26:20,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 05:26:20,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:20,942 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 05:26:20,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 05:26:20,943 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:20,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:20,943 INFO L85 PathProgramCache]: Analyzing trace with hash 804217187, now seen corresponding path program 2 times [2022-01-18 05:26:20,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:20,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048228551] [2022-01-18 05:26:20,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:20,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:20,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:20,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:20,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:20,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048228551] [2022-01-18 05:26:20,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048228551] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:20,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465392811] [2022-01-18 05:26:20,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:26:20,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:20,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:20,976 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 05:26:20,977 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 05:26:21,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:26:21,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:21,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 05:26:21,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:21,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:21,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465392811] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:21,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:21,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 05:26:21,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390017046] [2022-01-18 05:26:21,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:21,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 05:26:21,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:21,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 05:26:21,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-18 05:26:21,119 INFO L87 Difference]: Start difference. First operand 133 states and 369 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:21,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:21,189 INFO L93 Difference]: Finished difference Result 205 states and 550 transitions. [2022-01-18 05:26:21,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:26:21,190 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 05:26:21,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:21,191 INFO L225 Difference]: With dead ends: 205 [2022-01-18 05:26:21,191 INFO L226 Difference]: Without dead ends: 205 [2022-01-18 05:26:21,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:26:21,192 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:21,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 47 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:26:21,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-01-18 05:26:21,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 136. [2022-01-18 05:26:21,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.837037037037037) internal successors, (383), 135 states have internal predecessors, (383), 0 states have call successors, (0), 0 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 05:26:21,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 383 transitions. [2022-01-18 05:26:21,196 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 383 transitions. Word has length 18 [2022-01-18 05:26:21,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:21,196 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 383 transitions. [2022-01-18 05:26:21,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:21,196 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 383 transitions. [2022-01-18 05:26:21,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 05:26:21,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:21,197 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 05:26:21,215 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 05:26:21,411 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 05:26:21,412 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:21,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:21,412 INFO L85 PathProgramCache]: Analyzing trace with hash 26248067, now seen corresponding path program 2 times [2022-01-18 05:26:21,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:21,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086541196] [2022-01-18 05:26:21,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:21,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:21,440 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 05:26:21,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:21,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086541196] [2022-01-18 05:26:21,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086541196] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:26:21,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:26:21,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 05:26:21,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124899291] [2022-01-18 05:26:21,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:26:21,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:26:21,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:21,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:26:21,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:26:21,441 INFO L87 Difference]: Start difference. First operand 136 states and 383 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:21,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:21,541 INFO L93 Difference]: Finished difference Result 253 states and 641 transitions. [2022-01-18 05:26:21,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:26:21,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:21,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:21,542 INFO L225 Difference]: With dead ends: 253 [2022-01-18 05:26:21,542 INFO L226 Difference]: Without dead ends: 244 [2022-01-18 05:26:21,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-18 05:26:21,544 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 87 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:21,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 39 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:26:21,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-01-18 05:26:21,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 160. [2022-01-18 05:26:21,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.811320754716981) internal successors, (447), 159 states have internal predecessors, (447), 0 states have call successors, (0), 0 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 05:26:21,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 447 transitions. [2022-01-18 05:26:21,551 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 447 transitions. Word has length 18 [2022-01-18 05:26:21,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:21,552 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 447 transitions. [2022-01-18 05:26:21,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:21,552 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 447 transitions. [2022-01-18 05:26:21,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 05:26:21,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:21,552 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 05:26:21,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-18 05:26:21,553 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:21,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:21,553 INFO L85 PathProgramCache]: Analyzing trace with hash -738712767, now seen corresponding path program 3 times [2022-01-18 05:26:21,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:21,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384043811] [2022-01-18 05:26:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:21,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:21,591 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 05:26:21,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:21,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384043811] [2022-01-18 05:26:21,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384043811] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:26:21,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:26:21,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 05:26:21,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144900093] [2022-01-18 05:26:21,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:26:21,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:26:21,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:21,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:26:21,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:26:21,593 INFO L87 Difference]: Start difference. First operand 160 states and 447 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:21,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:21,667 INFO L93 Difference]: Finished difference Result 193 states and 523 transitions. [2022-01-18 05:26:21,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:26:21,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:21,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:21,669 INFO L225 Difference]: With dead ends: 193 [2022-01-18 05:26:21,669 INFO L226 Difference]: Without dead ends: 193 [2022-01-18 05:26:21,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 05:26:21,670 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:21,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 36 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:26:21,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-18 05:26:21,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2022-01-18 05:26:21,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8297872340425534) internal successors, (399), 141 states have internal predecessors, (399), 0 states have call successors, (0), 0 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 05:26:21,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 399 transitions. [2022-01-18 05:26:21,674 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 399 transitions. Word has length 18 [2022-01-18 05:26:21,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:21,674 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 399 transitions. [2022-01-18 05:26:21,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:21,675 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 399 transitions. [2022-01-18 05:26:21,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 05:26:21,675 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:21,675 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 05:26:21,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-18 05:26:21,675 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:21,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:21,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1491858461, now seen corresponding path program 3 times [2022-01-18 05:26:21,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:21,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147319133] [2022-01-18 05:26:21,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:21,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:21,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:21,721 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 05:26:21,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:21,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147319133] [2022-01-18 05:26:21,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147319133] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:26:21,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:26:21,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 05:26:21,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208320550] [2022-01-18 05:26:21,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:26:21,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:26:21,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:21,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:26:21,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:26:21,722 INFO L87 Difference]: Start difference. First operand 142 states and 399 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:21,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:21,783 INFO L93 Difference]: Finished difference Result 193 states and 512 transitions. [2022-01-18 05:26:21,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 05:26:21,784 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:21,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:21,785 INFO L225 Difference]: With dead ends: 193 [2022-01-18 05:26:21,785 INFO L226 Difference]: Without dead ends: 190 [2022-01-18 05:26:21,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:26:21,786 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 55 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:21,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 34 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:26:21,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-01-18 05:26:21,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 142. [2022-01-18 05:26:21,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8085106382978724) internal successors, (396), 141 states have internal predecessors, (396), 0 states have call successors, (0), 0 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 05:26:21,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 396 transitions. [2022-01-18 05:26:21,790 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 396 transitions. Word has length 18 [2022-01-18 05:26:21,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:21,790 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 396 transitions. [2022-01-18 05:26:21,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:21,790 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 396 transitions. [2022-01-18 05:26:21,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 05:26:21,791 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:21,791 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 05:26:21,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-18 05:26:21,791 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:21,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:21,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1888362025, now seen corresponding path program 4 times [2022-01-18 05:26:21,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:21,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576945874] [2022-01-18 05:26:21,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:21,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:21,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:21,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576945874] [2022-01-18 05:26:21,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576945874] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:21,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904971887] [2022-01-18 05:26:21,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:26:21,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:21,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:21,813 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 05:26:21,814 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 05:26:21,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:26:21,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:21,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 05:26:21,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:21,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:21,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:21,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904971887] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:21,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:21,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 05:26:21,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955555193] [2022-01-18 05:26:21,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:21,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 05:26:21,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:21,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 05:26:21,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 05:26:21,946 INFO L87 Difference]: Start difference. First operand 142 states and 396 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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 05:26:22,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:22,018 INFO L93 Difference]: Finished difference Result 193 states and 511 transitions. [2022-01-18 05:26:22,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:26:22,018 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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 18 [2022-01-18 05:26:22,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:22,019 INFO L225 Difference]: With dead ends: 193 [2022-01-18 05:26:22,019 INFO L226 Difference]: Without dead ends: 193 [2022-01-18 05:26:22,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:26:22,020 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 43 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:22,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 47 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:26:22,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-18 05:26:22,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2022-01-18 05:26:22,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8085106382978724) internal successors, (396), 141 states have internal predecessors, (396), 0 states have call successors, (0), 0 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 05:26:22,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 396 transitions. [2022-01-18 05:26:22,024 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 396 transitions. Word has length 18 [2022-01-18 05:26:22,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:22,024 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 396 transitions. [2022-01-18 05:26:22,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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 05:26:22,024 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 396 transitions. [2022-01-18 05:26:22,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 05:26:22,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:22,025 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 05:26:22,043 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 05:26:22,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:22,240 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:22,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:22,240 INFO L85 PathProgramCache]: Analyzing trace with hash 978830285, now seen corresponding path program 4 times [2022-01-18 05:26:22,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:22,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3143016] [2022-01-18 05:26:22,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:22,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:22,265 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 05:26:22,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:22,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3143016] [2022-01-18 05:26:22,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3143016] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:26:22,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:26:22,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 05:26:22,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833540862] [2022-01-18 05:26:22,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:26:22,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:26:22,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:22,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:26:22,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:26:22,267 INFO L87 Difference]: Start difference. First operand 142 states and 396 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:22,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:22,349 INFO L93 Difference]: Finished difference Result 197 states and 512 transitions. [2022-01-18 05:26:22,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 05:26:22,350 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:22,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:22,351 INFO L225 Difference]: With dead ends: 197 [2022-01-18 05:26:22,351 INFO L226 Difference]: Without dead ends: 188 [2022-01-18 05:26:22,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:26:22,352 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 68 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:22,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 36 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:26:22,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-18 05:26:22,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 164. [2022-01-18 05:26:22,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.791411042944785) internal successors, (455), 163 states have internal predecessors, (455), 0 states have call successors, (0), 0 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 05:26:22,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 455 transitions. [2022-01-18 05:26:22,355 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 455 transitions. Word has length 18 [2022-01-18 05:26:22,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:22,355 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 455 transitions. [2022-01-18 05:26:22,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:22,356 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 455 transitions. [2022-01-18 05:26:22,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 05:26:22,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:22,356 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 05:26:22,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-18 05:26:22,356 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:22,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:22,357 INFO L85 PathProgramCache]: Analyzing trace with hash 354089523, now seen corresponding path program 5 times [2022-01-18 05:26:22,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:22,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081684945] [2022-01-18 05:26:22,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:22,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:22,374 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 05:26:22,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:22,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081684945] [2022-01-18 05:26:22,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081684945] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:26:22,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:26:22,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 05:26:22,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227446879] [2022-01-18 05:26:22,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:26:22,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:26:22,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:22,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:26:22,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:26:22,375 INFO L87 Difference]: Start difference. First operand 164 states and 455 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:22,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:22,434 INFO L93 Difference]: Finished difference Result 190 states and 506 transitions. [2022-01-18 05:26:22,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:26:22,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:22,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:22,435 INFO L225 Difference]: With dead ends: 190 [2022-01-18 05:26:22,435 INFO L226 Difference]: Without dead ends: 190 [2022-01-18 05:26:22,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 05:26:22,436 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:22,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 36 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:26:22,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-01-18 05:26:22,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 164. [2022-01-18 05:26:22,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.791411042944785) internal successors, (455), 163 states have internal predecessors, (455), 0 states have call successors, (0), 0 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 05:26:22,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 455 transitions. [2022-01-18 05:26:22,441 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 455 transitions. Word has length 18 [2022-01-18 05:26:22,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:22,441 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 455 transitions. [2022-01-18 05:26:22,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:22,441 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 455 transitions. [2022-01-18 05:26:22,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 05:26:22,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:22,443 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 05:26:22,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-18 05:26:22,443 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:22,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:22,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1710306545, now seen corresponding path program 5 times [2022-01-18 05:26:22,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:22,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822474672] [2022-01-18 05:26:22,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:22,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:22,475 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 05:26:22,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:22,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822474672] [2022-01-18 05:26:22,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822474672] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:26:22,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:26:22,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 05:26:22,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612694203] [2022-01-18 05:26:22,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:26:22,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:26:22,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:22,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:26:22,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:26:22,479 INFO L87 Difference]: Start difference. First operand 164 states and 455 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:22,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:22,561 INFO L93 Difference]: Finished difference Result 248 states and 641 transitions. [2022-01-18 05:26:22,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:26:22,562 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:22,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:22,563 INFO L225 Difference]: With dead ends: 248 [2022-01-18 05:26:22,563 INFO L226 Difference]: Without dead ends: 245 [2022-01-18 05:26:22,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-18 05:26:22,563 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 66 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:22,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 58 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:26:22,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-01-18 05:26:22,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 161. [2022-01-18 05:26:22,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.775) internal successors, (444), 160 states have internal predecessors, (444), 0 states have call successors, (0), 0 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 05:26:22,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 444 transitions. [2022-01-18 05:26:22,567 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 444 transitions. Word has length 18 [2022-01-18 05:26:22,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:22,567 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 444 transitions. [2022-01-18 05:26:22,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:22,568 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 444 transitions. [2022-01-18 05:26:22,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 05:26:22,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:22,568 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 05:26:22,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-18 05:26:22,568 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:22,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:22,569 INFO L85 PathProgramCache]: Analyzing trace with hash 759478481, now seen corresponding path program 6 times [2022-01-18 05:26:22,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:22,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930158036] [2022-01-18 05:26:22,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:22,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:22,596 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 05:26:22,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:22,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930158036] [2022-01-18 05:26:22,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930158036] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:26:22,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:26:22,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 05:26:22,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979808522] [2022-01-18 05:26:22,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:26:22,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:26:22,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:22,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:26:22,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:26:22,597 INFO L87 Difference]: Start difference. First operand 161 states and 444 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:22,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:22,658 INFO L93 Difference]: Finished difference Result 178 states and 466 transitions. [2022-01-18 05:26:22,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:26:22,658 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:22,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:22,659 INFO L225 Difference]: With dead ends: 178 [2022-01-18 05:26:22,659 INFO L226 Difference]: Without dead ends: 178 [2022-01-18 05:26:22,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 05:26:22,660 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:22,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 40 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:26:22,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-18 05:26:22,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 135. [2022-01-18 05:26:22,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.798507462686567) internal successors, (375), 134 states have internal predecessors, (375), 0 states have call successors, (0), 0 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 05:26:22,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 375 transitions. [2022-01-18 05:26:22,664 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 375 transitions. Word has length 18 [2022-01-18 05:26:22,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:22,664 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 375 transitions. [2022-01-18 05:26:22,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:22,664 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 375 transitions. [2022-01-18 05:26:22,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 05:26:22,665 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:22,665 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 05:26:22,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-18 05:26:22,665 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:22,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:22,666 INFO L85 PathProgramCache]: Analyzing trace with hash 631984787, now seen corresponding path program 6 times [2022-01-18 05:26:22,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:22,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168062240] [2022-01-18 05:26:22,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:22,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:22,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:22,694 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 05:26:22,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:22,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168062240] [2022-01-18 05:26:22,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168062240] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:26:22,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:26:22,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 05:26:22,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385459976] [2022-01-18 05:26:22,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:26:22,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:26:22,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:22,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:26:22,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:26:22,696 INFO L87 Difference]: Start difference. First operand 135 states and 375 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:22,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:22,755 INFO L93 Difference]: Finished difference Result 139 states and 378 transitions. [2022-01-18 05:26:22,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 05:26:22,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:22,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:22,757 INFO L225 Difference]: With dead ends: 139 [2022-01-18 05:26:22,757 INFO L226 Difference]: Without dead ends: 135 [2022-01-18 05:26:22,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:26:22,757 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 36 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:22,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 42 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:26:22,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-01-18 05:26:22,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-01-18 05:26:22,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.791044776119403) internal successors, (374), 134 states have internal predecessors, (374), 0 states have call successors, (0), 0 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 05:26:22,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 374 transitions. [2022-01-18 05:26:22,760 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 374 transitions. Word has length 18 [2022-01-18 05:26:22,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:22,761 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 374 transitions. [2022-01-18 05:26:22,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 05:26:22,761 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 374 transitions. [2022-01-18 05:26:22,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:26:22,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:22,761 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:26:22,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-18 05:26:22,761 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:22,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:22,762 INFO L85 PathProgramCache]: Analyzing trace with hash -2083966421, now seen corresponding path program 1 times [2022-01-18 05:26:22,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:22,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603144806] [2022-01-18 05:26:22,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:22,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:22,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:22,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:22,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:22,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603144806] [2022-01-18 05:26:22,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603144806] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:22,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207367128] [2022-01-18 05:26:22,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:22,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:22,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:22,864 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 05:26:22,865 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 05:26:22,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:22,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:26:22,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:23,030 INFO L387 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 16 treesize of output 10 [2022-01-18 05:26:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:23,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:23,148 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:23,148 INFO L387 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 11 treesize of output 16 [2022-01-18 05:26:23,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:23,163 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 05:26:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:23,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207367128] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:23,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:23,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2022-01-18 05:26:23,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722920322] [2022-01-18 05:26:23,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:23,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 05:26:23,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:23,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 05:26:23,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-01-18 05:26:23,181 INFO L87 Difference]: Start difference. First operand 135 states and 374 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:23,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:23,532 INFO L93 Difference]: Finished difference Result 374 states and 1062 transitions. [2022-01-18 05:26:23,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:26:23,533 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:26:23,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:23,534 INFO L225 Difference]: With dead ends: 374 [2022-01-18 05:26:23,534 INFO L226 Difference]: Without dead ends: 364 [2022-01-18 05:26:23,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:26:23,535 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 125 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:23,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 44 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 614 Invalid, 0 Unknown, 61 Unchecked, 0.3s Time] [2022-01-18 05:26:23,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-01-18 05:26:23,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 186. [2022-01-18 05:26:23,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.8162162162162163) internal successors, (521), 185 states have internal predecessors, (521), 0 states have call successors, (0), 0 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 05:26:23,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 521 transitions. [2022-01-18 05:26:23,540 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 521 transitions. Word has length 20 [2022-01-18 05:26:23,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:23,540 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 521 transitions. [2022-01-18 05:26:23,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:23,541 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 521 transitions. [2022-01-18 05:26:23,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:26:23,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:23,541 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:26:23,570 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 05:26:23,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-18 05:26:23,742 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:23,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:23,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1077905909, now seen corresponding path program 2 times [2022-01-18 05:26:23,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:23,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714691865] [2022-01-18 05:26:23,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:23,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:23,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:23,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714691865] [2022-01-18 05:26:23,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714691865] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:23,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794607756] [2022-01-18 05:26:23,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:26:23,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:23,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:23,866 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:26:23,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 05:26:23,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:26:23,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:23,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:26:23,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:24,121 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:24,121 INFO L387 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 11 treesize of output 15 [2022-01-18 05:26:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:24,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:24,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:24,593 INFO L387 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 20 treesize of output 21 [2022-01-18 05:26:24,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:24,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794607756] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:24,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:24,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-01-18 05:26:24,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695759014] [2022-01-18 05:26:24,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:24,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:26:24,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:24,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:26:24,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:26:24,683 INFO L87 Difference]: Start difference. First operand 186 states and 521 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:26:26,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:26,064 INFO L93 Difference]: Finished difference Result 575 states and 1655 transitions. [2022-01-18 05:26:26,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 05:26:26,065 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 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 20 [2022-01-18 05:26:26,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:26,067 INFO L225 Difference]: With dead ends: 575 [2022-01-18 05:26:26,067 INFO L226 Difference]: Without dead ends: 556 [2022-01-18 05:26:26,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=471, Invalid=2499, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 05:26:26,068 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 291 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 963 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:26,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 89 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 953 Invalid, 0 Unknown, 963 Unchecked, 0.4s Time] [2022-01-18 05:26:26,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-01-18 05:26:26,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 210. [2022-01-18 05:26:26,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.8325358851674642) internal successors, (592), 209 states have internal predecessors, (592), 0 states have call successors, (0), 0 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 05:26:26,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 592 transitions. [2022-01-18 05:26:26,074 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 592 transitions. Word has length 20 [2022-01-18 05:26:26,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:26,075 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 592 transitions. [2022-01-18 05:26:26,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:26:26,075 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 592 transitions. [2022-01-18 05:26:26,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:26:26,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:26,075 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:26:26,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:26,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-18 05:26:26,291 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:26,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:26,292 INFO L85 PathProgramCache]: Analyzing trace with hash 800910909, now seen corresponding path program 3 times [2022-01-18 05:26:26,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:26,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187031311] [2022-01-18 05:26:26,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:26,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:26,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:26,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187031311] [2022-01-18 05:26:26,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187031311] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:26,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760480404] [2022-01-18 05:26:26,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:26:26,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:26,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:26,368 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:26:26,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 05:26:26,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:26:26,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:26,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:26:26,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:26,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:26,477 INFO L387 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 11 treesize of output 15 [2022-01-18 05:26:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:26,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:26,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:26,918 INFO L387 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 20 treesize of output 21 [2022-01-18 05:26:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:26,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760480404] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:26,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:26,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-01-18 05:26:26,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543933391] [2022-01-18 05:26:26,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:26,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:26:26,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:26,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:26:26,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:26:26,992 INFO L87 Difference]: Start difference. First operand 210 states and 592 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:26:29,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:29,190 INFO L93 Difference]: Finished difference Result 621 states and 1767 transitions. [2022-01-18 05:26:29,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 05:26:29,190 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 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 20 [2022-01-18 05:26:29,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:29,197 INFO L225 Difference]: With dead ends: 621 [2022-01-18 05:26:29,197 INFO L226 Difference]: Without dead ends: 591 [2022-01-18 05:26:29,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=882, Invalid=4520, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 05:26:29,203 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 319 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 495 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:29,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 69 Invalid, 1778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1137 Invalid, 0 Unknown, 495 Unchecked, 0.6s Time] [2022-01-18 05:26:29,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-01-18 05:26:29,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 227. [2022-01-18 05:26:29,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.849557522123894) internal successors, (644), 226 states have internal predecessors, (644), 0 states have call successors, (0), 0 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 05:26:29,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 644 transitions. [2022-01-18 05:26:29,213 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 644 transitions. Word has length 20 [2022-01-18 05:26:29,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:29,213 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 644 transitions. [2022-01-18 05:26:29,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:26:29,213 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 644 transitions. [2022-01-18 05:26:29,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:26:29,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:29,214 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:26:29,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:29,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 05:26:29,419 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:29,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:29,420 INFO L85 PathProgramCache]: Analyzing trace with hash -32827531, now seen corresponding path program 4 times [2022-01-18 05:26:29,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:29,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714512604] [2022-01-18 05:26:29,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:29,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:29,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:29,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:29,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714512604] [2022-01-18 05:26:29,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714512604] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:29,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649695204] [2022-01-18 05:26:29,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:26:29,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:29,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:29,514 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:26:29,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 05:26:29,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:26:29,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:29,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:26:29,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:29,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:26:29,630 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 05:26:29,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:29,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:29,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:29,784 INFO L387 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 11 treesize of output 16 [2022-01-18 05:26:29,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:29,793 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 05:26:29,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:29,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649695204] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:29,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:29,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 05:26:29,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006533680] [2022-01-18 05:26:29,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:29,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:26:29,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:29,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:26:29,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:26:29,812 INFO L87 Difference]: Start difference. First operand 227 states and 644 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:30,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:30,086 INFO L93 Difference]: Finished difference Result 334 states and 957 transitions. [2022-01-18 05:26:30,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:26:30,086 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:26:30,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:30,088 INFO L225 Difference]: With dead ends: 334 [2022-01-18 05:26:30,088 INFO L226 Difference]: Without dead ends: 323 [2022-01-18 05:26:30,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:26:30,088 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 38 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:30,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 39 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 582 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-01-18 05:26:30,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-01-18 05:26:30,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 235. [2022-01-18 05:26:30,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.858974358974359) internal successors, (669), 234 states have internal predecessors, (669), 0 states have call successors, (0), 0 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 05:26:30,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 669 transitions. [2022-01-18 05:26:30,093 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 669 transitions. Word has length 20 [2022-01-18 05:26:30,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:30,093 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 669 transitions. [2022-01-18 05:26:30,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:30,093 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 669 transitions. [2022-01-18 05:26:30,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:26:30,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:30,094 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:26:30,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:30,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:30,294 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:30,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:30,295 INFO L85 PathProgramCache]: Analyzing trace with hash -669294385, now seen corresponding path program 5 times [2022-01-18 05:26:30,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:30,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920310019] [2022-01-18 05:26:30,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:30,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:30,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:30,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:30,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920310019] [2022-01-18 05:26:30,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920310019] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:30,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748222245] [2022-01-18 05:26:30,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:26:30,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:30,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:30,375 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:26:30,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 05:26:30,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:26:30,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:30,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:26:30,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:30,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:26:30,500 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 05:26:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:30,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:30,656 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:30,657 INFO L387 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 11 treesize of output 16 [2022-01-18 05:26:30,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:30,665 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 05:26:30,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:30,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748222245] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:30,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:30,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 05:26:30,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943912135] [2022-01-18 05:26:30,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:30,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:26:30,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:30,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:26:30,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:26:30,693 INFO L87 Difference]: Start difference. First operand 235 states and 669 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:30,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:30,932 INFO L93 Difference]: Finished difference Result 335 states and 955 transitions. [2022-01-18 05:26:30,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:26:30,932 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:26:30,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:30,934 INFO L225 Difference]: With dead ends: 335 [2022-01-18 05:26:30,934 INFO L226 Difference]: Without dead ends: 325 [2022-01-18 05:26:30,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:26:30,934 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 38 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:30,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 46 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 574 Invalid, 0 Unknown, 151 Unchecked, 0.2s Time] [2022-01-18 05:26:30,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-01-18 05:26:30,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 231. [2022-01-18 05:26:30,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.856521739130435) internal successors, (657), 230 states have internal predecessors, (657), 0 states have call successors, (0), 0 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 05:26:30,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 657 transitions. [2022-01-18 05:26:30,938 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 657 transitions. Word has length 20 [2022-01-18 05:26:30,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:30,939 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 657 transitions. [2022-01-18 05:26:30,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:30,939 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 657 transitions. [2022-01-18 05:26:30,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:26:30,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:30,939 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:26:30,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:31,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:31,154 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:31,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:31,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1927902218, now seen corresponding path program 1 times [2022-01-18 05:26:31,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:31,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285030803] [2022-01-18 05:26:31,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:31,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:31,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:31,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:31,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:31,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285030803] [2022-01-18 05:26:31,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285030803] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:31,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345586762] [2022-01-18 05:26:31,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:31,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:31,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:31,238 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:26:31,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 05:26:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:31,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:26:31,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:31,378 INFO L387 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 16 treesize of output 10 [2022-01-18 05:26:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:31,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:31,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:31,486 INFO L387 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 11 treesize of output 16 [2022-01-18 05:26:31,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:31,495 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 05:26:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:31,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345586762] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:31,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:31,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2022-01-18 05:26:31,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477411674] [2022-01-18 05:26:31,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:31,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 05:26:31,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:31,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 05:26:31,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-01-18 05:26:31,518 INFO L87 Difference]: Start difference. First operand 231 states and 657 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:31,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:31,866 INFO L93 Difference]: Finished difference Result 475 states and 1356 transitions. [2022-01-18 05:26:31,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:26:31,866 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:26:31,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:31,868 INFO L225 Difference]: With dead ends: 475 [2022-01-18 05:26:31,868 INFO L226 Difference]: Without dead ends: 466 [2022-01-18 05:26:31,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:26:31,868 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 112 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:31,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 63 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 646 Invalid, 0 Unknown, 79 Unchecked, 0.3s Time] [2022-01-18 05:26:31,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-01-18 05:26:31,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 239. [2022-01-18 05:26:31,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.8865546218487395) internal successors, (687), 238 states have internal predecessors, (687), 0 states have call successors, (0), 0 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 05:26:31,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 687 transitions. [2022-01-18 05:26:31,874 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 687 transitions. Word has length 20 [2022-01-18 05:26:31,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:31,874 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 687 transitions. [2022-01-18 05:26:31,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:31,874 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 687 transitions. [2022-01-18 05:26:31,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:26:31,875 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:31,875 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:26:31,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:32,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:32,087 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:32,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:32,088 INFO L85 PathProgramCache]: Analyzing trace with hash 475594560, now seen corresponding path program 2 times [2022-01-18 05:26:32,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:32,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630426359] [2022-01-18 05:26:32,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:32,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:32,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:32,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:32,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630426359] [2022-01-18 05:26:32,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630426359] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:32,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385896023] [2022-01-18 05:26:32,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:26:32,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:32,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:32,183 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:26:32,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 05:26:32,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:26:32,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:32,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:26:32,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:32,383 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:32,383 INFO L387 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 11 treesize of output 15 [2022-01-18 05:26:32,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:32,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:32,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:32,792 INFO L387 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 20 treesize of output 21 [2022-01-18 05:26:32,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:32,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385896023] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:32,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:32,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-01-18 05:26:32,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89160695] [2022-01-18 05:26:32,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:32,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:26:32,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:32,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:26:32,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:26:32,881 INFO L87 Difference]: Start difference. First operand 239 states and 687 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:26:34,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:34,572 INFO L93 Difference]: Finished difference Result 655 states and 1874 transitions. [2022-01-18 05:26:34,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 05:26:34,573 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 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 20 [2022-01-18 05:26:34,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:34,575 INFO L225 Difference]: With dead ends: 655 [2022-01-18 05:26:34,575 INFO L226 Difference]: Without dead ends: 631 [2022-01-18 05:26:34,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=612, Invalid=3420, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 05:26:34,576 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 250 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 933 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:34,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 104 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1005 Invalid, 0 Unknown, 933 Unchecked, 0.4s Time] [2022-01-18 05:26:34,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-01-18 05:26:34,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 273. [2022-01-18 05:26:34,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.926470588235294) internal successors, (796), 272 states have internal predecessors, (796), 0 states have call successors, (0), 0 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 05:26:34,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 796 transitions. [2022-01-18 05:26:34,583 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 796 transitions. Word has length 20 [2022-01-18 05:26:34,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:34,583 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 796 transitions. [2022-01-18 05:26:34,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:26:34,586 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 796 transitions. [2022-01-18 05:26:34,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:26:34,587 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:34,587 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:26:34,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:34,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-18 05:26:34,803 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:34,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:34,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1331859903, now seen corresponding path program 1 times [2022-01-18 05:26:34,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:34,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717676911] [2022-01-18 05:26:34,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:34,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:34,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:34,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:34,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:34,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717676911] [2022-01-18 05:26:34,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717676911] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:34,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822218414] [2022-01-18 05:26:34,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:34,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:34,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:34,899 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:26:34,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 05:26:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:34,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:26:34,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:35,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:26:35,093 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 05:26:35,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:35,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:35,214 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:35,215 INFO L387 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 11 treesize of output 16 [2022-01-18 05:26:35,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:35,223 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 05:26:35,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:35,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822218414] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:35,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:35,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 05:26:35,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463490273] [2022-01-18 05:26:35,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:35,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:26:35,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:35,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:26:35,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:26:35,245 INFO L87 Difference]: Start difference. First operand 273 states and 796 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 05:26:35,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:35,402 INFO L93 Difference]: Finished difference Result 365 states and 1051 transitions. [2022-01-18 05:26:35,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:26:35,402 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 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 20 [2022-01-18 05:26:35,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:35,403 INFO L225 Difference]: With dead ends: 365 [2022-01-18 05:26:35,403 INFO L226 Difference]: Without dead ends: 363 [2022-01-18 05:26:35,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:26:35,404 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:35,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 57 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 145 Unchecked, 0.1s Time] [2022-01-18 05:26:35,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-01-18 05:26:35,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 287. [2022-01-18 05:26:35,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.9195804195804196) internal successors, (835), 286 states have internal predecessors, (835), 0 states have call successors, (0), 0 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 05:26:35,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 835 transitions. [2022-01-18 05:26:35,409 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 835 transitions. Word has length 20 [2022-01-18 05:26:35,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:35,409 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 835 transitions. [2022-01-18 05:26:35,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 05:26:35,409 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 835 transitions. [2022-01-18 05:26:35,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:26:35,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:35,410 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:26:35,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:35,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-18 05:26:35,623 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:35,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:35,624 INFO L85 PathProgramCache]: Analyzing trace with hash -941602499, now seen corresponding path program 2 times [2022-01-18 05:26:35,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:35,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67622474] [2022-01-18 05:26:35,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:35,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:35,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:35,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67622474] [2022-01-18 05:26:35,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67622474] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:35,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564213987] [2022-01-18 05:26:35,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:26:35,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:35,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:35,715 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:26:35,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 05:26:35,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:26:35,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:35,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:26:35,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:35,891 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:35,892 INFO L387 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 15 treesize of output 19 [2022-01-18 05:26:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:35,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:36,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:36,278 INFO L387 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 20 treesize of output 21 [2022-01-18 05:26:36,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:36,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564213987] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:36,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:36,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-01-18 05:26:36,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247344615] [2022-01-18 05:26:36,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:36,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:26:36,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:36,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:26:36,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:26:36,365 INFO L87 Difference]: Start difference. First operand 287 states and 835 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:26:38,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:38,099 INFO L93 Difference]: Finished difference Result 728 states and 2055 transitions. [2022-01-18 05:26:38,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 05:26:38,099 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 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 20 [2022-01-18 05:26:38,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:38,102 INFO L225 Difference]: With dead ends: 728 [2022-01-18 05:26:38,102 INFO L226 Difference]: Without dead ends: 714 [2022-01-18 05:26:38,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=603, Invalid=3557, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 05:26:38,103 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 301 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 2091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1016 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:38,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 92 Invalid, 2091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 961 Invalid, 0 Unknown, 1016 Unchecked, 0.4s Time] [2022-01-18 05:26:38,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-01-18 05:26:38,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 268. [2022-01-18 05:26:38,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.932584269662921) internal successors, (783), 267 states have internal predecessors, (783), 0 states have call successors, (0), 0 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 05:26:38,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 783 transitions. [2022-01-18 05:26:38,110 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 783 transitions. Word has length 20 [2022-01-18 05:26:38,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:38,110 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 783 transitions. [2022-01-18 05:26:38,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:26:38,110 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 783 transitions. [2022-01-18 05:26:38,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:26:38,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:38,111 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:26:38,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:38,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-18 05:26:38,327 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:38,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:38,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1411001128, now seen corresponding path program 3 times [2022-01-18 05:26:38,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:38,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238513430] [2022-01-18 05:26:38,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:38,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:38,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:38,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:38,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238513430] [2022-01-18 05:26:38,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238513430] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:38,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056743276] [2022-01-18 05:26:38,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:26:38,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:38,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:38,408 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:26:38,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 05:26:38,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:26:38,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:38,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:26:38,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:38,518 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:38,519 INFO L387 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 11 treesize of output 15 [2022-01-18 05:26:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:38,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:38,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:38,885 INFO L387 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 20 treesize of output 21 [2022-01-18 05:26:38,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:38,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056743276] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:38,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:38,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-01-18 05:26:38,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045463633] [2022-01-18 05:26:38,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:38,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:26:38,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:38,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:26:38,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:26:38,968 INFO L87 Difference]: Start difference. First operand 268 states and 783 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:26:41,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:41,173 INFO L93 Difference]: Finished difference Result 663 states and 1899 transitions. [2022-01-18 05:26:41,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 05:26:41,173 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 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 20 [2022-01-18 05:26:41,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:41,175 INFO L225 Difference]: With dead ends: 663 [2022-01-18 05:26:41,175 INFO L226 Difference]: Without dead ends: 636 [2022-01-18 05:26:41,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=948, Invalid=4904, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 05:26:41,177 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 341 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 656 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:41,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 81 Invalid, 1963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1159 Invalid, 0 Unknown, 656 Unchecked, 0.5s Time] [2022-01-18 05:26:41,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-01-18 05:26:41,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 279. [2022-01-18 05:26:41,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.946043165467626) internal successors, (819), 278 states have internal predecessors, (819), 0 states have call successors, (0), 0 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 05:26:41,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 819 transitions. [2022-01-18 05:26:41,187 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 819 transitions. Word has length 20 [2022-01-18 05:26:41,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:41,187 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 819 transitions. [2022-01-18 05:26:41,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:26:41,188 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 819 transitions. [2022-01-18 05:26:41,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:26:41,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:41,188 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:26:41,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:41,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-01-18 05:26:41,407 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:41,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:41,408 INFO L85 PathProgramCache]: Analyzing trace with hash -342712452, now seen corresponding path program 4 times [2022-01-18 05:26:41,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:41,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899987745] [2022-01-18 05:26:41,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:41,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:41,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:41,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:41,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899987745] [2022-01-18 05:26:41,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899987745] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:41,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899172569] [2022-01-18 05:26:41,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:26:41,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:41,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:41,491 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:26:41,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 05:26:41,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:26:41,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:41,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:26:41,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:41,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:26:41,616 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 05:26:41,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:41,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:41,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:41,757 INFO L387 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 11 treesize of output 16 [2022-01-18 05:26:41,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:41,765 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 05:26:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:41,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899172569] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:41,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:41,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 05:26:41,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753902796] [2022-01-18 05:26:41,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:41,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:26:41,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:41,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:26:41,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:26:41,787 INFO L87 Difference]: Start difference. First operand 279 states and 819 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:42,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:42,026 INFO L93 Difference]: Finished difference Result 383 states and 1131 transitions. [2022-01-18 05:26:42,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:26:42,027 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:26:42,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:42,028 INFO L225 Difference]: With dead ends: 383 [2022-01-18 05:26:42,028 INFO L226 Difference]: Without dead ends: 372 [2022-01-18 05:26:42,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:26:42,029 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 65 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:42,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 33 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 553 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-01-18 05:26:42,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-01-18 05:26:42,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 281. [2022-01-18 05:26:42,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.95) internal successors, (826), 280 states have internal predecessors, (826), 0 states have call successors, (0), 0 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 05:26:42,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 826 transitions. [2022-01-18 05:26:42,033 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 826 transitions. Word has length 20 [2022-01-18 05:26:42,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:42,033 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 826 transitions. [2022-01-18 05:26:42,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:42,034 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 826 transitions. [2022-01-18 05:26:42,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:26:42,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:42,034 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:26:42,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:42,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:42,239 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:42,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:42,240 INFO L85 PathProgramCache]: Analyzing trace with hash -285788795, now seen corresponding path program 6 times [2022-01-18 05:26:42,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:42,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313108387] [2022-01-18 05:26:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:42,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:42,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:42,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313108387] [2022-01-18 05:26:42,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313108387] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:42,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519446352] [2022-01-18 05:26:42,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:26:42,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:42,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:42,376 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:26:42,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 05:26:42,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:26:42,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:42,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:26:42,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:42,576 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:42,576 INFO L387 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 11 treesize of output 15 [2022-01-18 05:26:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:42,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:42,898 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:42,898 INFO L387 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 24 treesize of output 25 [2022-01-18 05:26:43,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:43,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519446352] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:43,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:43,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-01-18 05:26:43,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722659111] [2022-01-18 05:26:43,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:43,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:26:43,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:43,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:26:43,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:26:43,020 INFO L87 Difference]: Start difference. First operand 281 states and 826 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:26:44,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:44,547 INFO L93 Difference]: Finished difference Result 646 states and 1825 transitions. [2022-01-18 05:26:44,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 05:26:44,548 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 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 20 [2022-01-18 05:26:44,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:44,550 INFO L225 Difference]: With dead ends: 646 [2022-01-18 05:26:44,550 INFO L226 Difference]: Without dead ends: 607 [2022-01-18 05:26:44,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=559, Invalid=2633, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 05:26:44,551 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 312 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 470 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:44,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 108 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1108 Invalid, 0 Unknown, 470 Unchecked, 0.4s Time] [2022-01-18 05:26:44,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-01-18 05:26:44,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 308. [2022-01-18 05:26:44,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.954397394136808) internal successors, (907), 307 states have internal predecessors, (907), 0 states have call successors, (0), 0 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 05:26:44,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 907 transitions. [2022-01-18 05:26:44,558 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 907 transitions. Word has length 20 [2022-01-18 05:26:44,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:44,558 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 907 transitions. [2022-01-18 05:26:44,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:26:44,558 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 907 transitions. [2022-01-18 05:26:44,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:26:44,559 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:44,559 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:26:44,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:44,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 05:26:44,768 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:44,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:44,769 INFO L85 PathProgramCache]: Analyzing trace with hash -2093243258, now seen corresponding path program 1 times [2022-01-18 05:26:44,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:44,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123422023] [2022-01-18 05:26:44,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:44,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:44,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:44,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123422023] [2022-01-18 05:26:44,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123422023] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:44,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586898915] [2022-01-18 05:26:44,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:44,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:44,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:44,854 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:26:44,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 05:26:44,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:44,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:26:44,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:45,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:26:45,034 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 05:26:45,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:45,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:45,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:45,146 INFO L387 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 15 treesize of output 20 [2022-01-18 05:26:45,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:45,155 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 05:26:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:45,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586898915] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:45,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:45,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-01-18 05:26:45,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500908267] [2022-01-18 05:26:45,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:45,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:26:45,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:45,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:26:45,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:26:45,185 INFO L87 Difference]: Start difference. First operand 308 states and 907 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 05:26:45,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:45,354 INFO L93 Difference]: Finished difference Result 396 states and 1143 transitions. [2022-01-18 05:26:45,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:26:45,354 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2022-01-18 05:26:45,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:45,356 INFO L225 Difference]: With dead ends: 396 [2022-01-18 05:26:45,356 INFO L226 Difference]: Without dead ends: 391 [2022-01-18 05:26:45,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:26:45,356 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 52 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:45,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 39 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 305 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2022-01-18 05:26:45,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-01-18 05:26:45,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 312. [2022-01-18 05:26:45,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.964630225080386) internal successors, (922), 311 states have internal predecessors, (922), 0 states have call successors, (0), 0 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 05:26:45,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 922 transitions. [2022-01-18 05:26:45,374 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 922 transitions. Word has length 20 [2022-01-18 05:26:45,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:45,374 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 922 transitions. [2022-01-18 05:26:45,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 05:26:45,374 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 922 transitions. [2022-01-18 05:26:45,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:26:45,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:45,375 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:26:45,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:45,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 05:26:45,588 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:45,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:45,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1848967994, now seen corresponding path program 1 times [2022-01-18 05:26:45,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:45,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056442680] [2022-01-18 05:26:45,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:45,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:45,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:45,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:45,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056442680] [2022-01-18 05:26:45,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056442680] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:45,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650447772] [2022-01-18 05:26:45,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:45,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:45,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:45,666 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:26:45,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 05:26:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:45,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:26:45,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:45,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:26:45,811 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 05:26:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:45,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:45,922 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:45,922 INFO L387 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 15 treesize of output 20 [2022-01-18 05:26:45,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:45,931 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 05:26:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:45,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650447772] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:45,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:45,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 05:26:45,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278774567] [2022-01-18 05:26:45,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:45,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:26:45,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:45,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:26:45,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:26:45,959 INFO L87 Difference]: Start difference. First operand 312 states and 922 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:46,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:46,246 INFO L93 Difference]: Finished difference Result 426 states and 1230 transitions. [2022-01-18 05:26:46,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:26:46,246 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:26:46,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:46,248 INFO L225 Difference]: With dead ends: 426 [2022-01-18 05:26:46,248 INFO L226 Difference]: Without dead ends: 420 [2022-01-18 05:26:46,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:26:46,248 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 57 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:46,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 59 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 694 Invalid, 0 Unknown, 118 Unchecked, 0.2s Time] [2022-01-18 05:26:46,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-01-18 05:26:46,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 302. [2022-01-18 05:26:46,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9601328903654487) internal successors, (891), 301 states have internal predecessors, (891), 0 states have call successors, (0), 0 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 05:26:46,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 891 transitions. [2022-01-18 05:26:46,253 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 891 transitions. Word has length 20 [2022-01-18 05:26:46,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:46,253 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 891 transitions. [2022-01-18 05:26:46,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:46,254 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 891 transitions. [2022-01-18 05:26:46,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:26:46,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:46,254 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:26:46,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:46,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 05:26:46,468 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:46,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:46,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1707463971, now seen corresponding path program 7 times [2022-01-18 05:26:46,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:46,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952358925] [2022-01-18 05:26:46,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:46,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:46,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:46,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952358925] [2022-01-18 05:26:46,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952358925] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:46,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028337889] [2022-01-18 05:26:46,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:26:46,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:46,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:46,542 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:26:46,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 05:26:46,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:46,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:26:46,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:46,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:26:46,660 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 05:26:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:46,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:46,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:46,815 INFO L387 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 15 treesize of output 20 [2022-01-18 05:26:46,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:46,822 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 05:26:46,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:46,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028337889] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:46,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:46,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 05:26:46,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939685401] [2022-01-18 05:26:46,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:46,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:26:46,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:46,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:26:46,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:26:46,851 INFO L87 Difference]: Start difference. First operand 302 states and 891 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 05:26:46,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:46,977 INFO L93 Difference]: Finished difference Result 375 states and 1093 transitions. [2022-01-18 05:26:46,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:26:46,977 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 20 [2022-01-18 05:26:46,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:46,979 INFO L225 Difference]: With dead ends: 375 [2022-01-18 05:26:46,979 INFO L226 Difference]: Without dead ends: 371 [2022-01-18 05:26:46,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:26:46,980 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:46,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 37 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-01-18 05:26:46,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-01-18 05:26:46,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 326. [2022-01-18 05:26:46,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9723076923076923) internal successors, (966), 325 states have internal predecessors, (966), 0 states have call successors, (0), 0 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 05:26:46,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 966 transitions. [2022-01-18 05:26:46,985 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 966 transitions. Word has length 20 [2022-01-18 05:26:46,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:46,985 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 966 transitions. [2022-01-18 05:26:46,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 05:26:46,985 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 966 transitions. [2022-01-18 05:26:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:26:46,986 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:46,986 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:26:47,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:47,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:47,202 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:47,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:47,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1699999644, now seen corresponding path program 2 times [2022-01-18 05:26:47,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:47,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876821531] [2022-01-18 05:26:47,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:47,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:47,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:47,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876821531] [2022-01-18 05:26:47,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876821531] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:47,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181255745] [2022-01-18 05:26:47,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:26:47,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:47,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:47,273 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:26:47,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 05:26:47,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:26:47,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:47,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:26:47,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:47,367 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:47,367 INFO L387 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 11 treesize of output 15 [2022-01-18 05:26:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:47,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:47,697 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:47,697 INFO L387 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 24 treesize of output 25 [2022-01-18 05:26:47,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:47,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181255745] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:47,806 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:47,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-01-18 05:26:47,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641209503] [2022-01-18 05:26:47,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:47,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:26:47,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:47,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:26:47,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:26:47,807 INFO L87 Difference]: Start difference. First operand 326 states and 966 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:26:50,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:50,879 INFO L93 Difference]: Finished difference Result 849 states and 2328 transitions. [2022-01-18 05:26:50,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 05:26:50,879 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 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 20 [2022-01-18 05:26:50,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:50,882 INFO L225 Difference]: With dead ends: 849 [2022-01-18 05:26:50,882 INFO L226 Difference]: Without dead ends: 807 [2022-01-18 05:26:50,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1916 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1351, Invalid=4969, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 05:26:50,884 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 427 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:50,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 128 Invalid, 1918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1408 Invalid, 0 Unknown, 291 Unchecked, 0.6s Time] [2022-01-18 05:26:50,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-01-18 05:26:50,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 322. [2022-01-18 05:26:50,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.987538940809969) internal successors, (959), 321 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 05:26:50,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 959 transitions. [2022-01-18 05:26:50,891 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 959 transitions. Word has length 20 [2022-01-18 05:26:50,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:50,891 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 959 transitions. [2022-01-18 05:26:50,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:26:50,891 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 959 transitions. [2022-01-18 05:26:50,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:26:50,892 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:50,892 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:26:50,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:51,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:51,108 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:51,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:51,108 INFO L85 PathProgramCache]: Analyzing trace with hash -905666415, now seen corresponding path program 8 times [2022-01-18 05:26:51,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:51,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217324080] [2022-01-18 05:26:51,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:51,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:51,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:51,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217324080] [2022-01-18 05:26:51,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217324080] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:51,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358305287] [2022-01-18 05:26:51,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:26:51,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:51,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:51,173 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:26:51,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 05:26:51,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:26:51,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:51,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:26:51,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:51,272 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:51,273 INFO L387 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 11 treesize of output 15 [2022-01-18 05:26:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:51,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:51,595 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:51,595 INFO L387 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 24 treesize of output 25 [2022-01-18 05:26:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:51,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358305287] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:51,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:51,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-01-18 05:26:51,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445549278] [2022-01-18 05:26:51,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:51,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:26:51,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:51,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:26:51,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:26:51,705 INFO L87 Difference]: Start difference. First operand 322 states and 959 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:26:54,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:54,359 INFO L93 Difference]: Finished difference Result 762 states and 2119 transitions. [2022-01-18 05:26:54,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 05:26:54,359 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 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 20 [2022-01-18 05:26:54,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:54,362 INFO L225 Difference]: With dead ends: 762 [2022-01-18 05:26:54,362 INFO L226 Difference]: Without dead ends: 730 [2022-01-18 05:26:54,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1205, Invalid=4197, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 05:26:54,363 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 359 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 327 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:54,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 96 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1346 Invalid, 0 Unknown, 327 Unchecked, 0.6s Time] [2022-01-18 05:26:54,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-01-18 05:26:54,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 321. [2022-01-18 05:26:54,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 3.0) internal successors, (960), 320 states have internal predecessors, (960), 0 states have call successors, (0), 0 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 05:26:54,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 960 transitions. [2022-01-18 05:26:54,370 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 960 transitions. Word has length 20 [2022-01-18 05:26:54,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:54,370 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 960 transitions. [2022-01-18 05:26:54,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:26:54,370 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 960 transitions. [2022-01-18 05:26:54,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:26:54,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:54,370 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:26:54,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:54,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-01-18 05:26:54,591 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:54,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:54,591 INFO L85 PathProgramCache]: Analyzing trace with hash -149178578, now seen corresponding path program 5 times [2022-01-18 05:26:54,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:54,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335778463] [2022-01-18 05:26:54,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:54,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:54,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:54,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:54,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335778463] [2022-01-18 05:26:54,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335778463] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:54,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803762651] [2022-01-18 05:26:54,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:26:54,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:54,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:54,683 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:26:54,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 05:26:54,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:26:54,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:54,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:26:54,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:54,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:26:54,864 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 05:26:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:54,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:54,958 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:54,958 INFO L387 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 15 treesize of output 20 [2022-01-18 05:26:54,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:54,966 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 05:26:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:54,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803762651] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:54,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:54,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-01-18 05:26:54,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206751319] [2022-01-18 05:26:54,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:54,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:26:54,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:54,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:26:54,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:26:54,994 INFO L87 Difference]: Start difference. First operand 321 states and 960 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 05:26:55,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:55,162 INFO L93 Difference]: Finished difference Result 406 states and 1198 transitions. [2022-01-18 05:26:55,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:26:55,162 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2022-01-18 05:26:55,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:55,163 INFO L225 Difference]: With dead ends: 406 [2022-01-18 05:26:55,163 INFO L226 Difference]: Without dead ends: 400 [2022-01-18 05:26:55,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:26:55,164 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:55,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 41 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 323 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2022-01-18 05:26:55,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-01-18 05:26:55,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 330. [2022-01-18 05:26:55,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 3.0091185410334345) internal successors, (990), 329 states have internal predecessors, (990), 0 states have call successors, (0), 0 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 05:26:55,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 990 transitions. [2022-01-18 05:26:55,169 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 990 transitions. Word has length 20 [2022-01-18 05:26:55,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:55,169 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 990 transitions. [2022-01-18 05:26:55,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 05:26:55,169 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 990 transitions. [2022-01-18 05:26:55,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:26:55,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:55,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:26:55,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 05:26:55,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-01-18 05:26:55,385 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:55,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:55,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1178685170, now seen corresponding path program 6 times [2022-01-18 05:26:55,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:55,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180013503] [2022-01-18 05:26:55,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:55,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:55,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:55,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:55,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180013503] [2022-01-18 05:26:55,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180013503] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:55,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598170245] [2022-01-18 05:26:55,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:26:55,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:55,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:55,454 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:26:55,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 05:26:55,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:26:55,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:26:55,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:26:55,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:55,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:55,559 INFO L387 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 11 treesize of output 15 [2022-01-18 05:26:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:55,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:55,907 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:55,907 INFO L387 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 24 treesize of output 25 [2022-01-18 05:26:56,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:56,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598170245] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:56,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:56,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-01-18 05:26:56,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017311950] [2022-01-18 05:26:56,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:56,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:26:56,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:56,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:26:56,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:26:56,033 INFO L87 Difference]: Start difference. First operand 330 states and 990 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:26:59,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:59,076 INFO L93 Difference]: Finished difference Result 799 states and 2191 transitions. [2022-01-18 05:26:59,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-18 05:26:59,077 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 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 20 [2022-01-18 05:26:59,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:59,079 INFO L225 Difference]: With dead ends: 799 [2022-01-18 05:26:59,079 INFO L226 Difference]: Without dead ends: 770 [2022-01-18 05:26:59,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1387, Invalid=5255, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 05:26:59,081 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 482 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:59,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 131 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 1304 Invalid, 0 Unknown, 253 Unchecked, 0.6s Time] [2022-01-18 05:26:59,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-01-18 05:26:59,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 339. [2022-01-18 05:26:59,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.0177514792899407) internal successors, (1020), 338 states have internal predecessors, (1020), 0 states have call successors, (0), 0 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 05:26:59,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1020 transitions. [2022-01-18 05:26:59,088 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1020 transitions. Word has length 20 [2022-01-18 05:26:59,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:59,088 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1020 transitions. [2022-01-18 05:26:59,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:26:59,088 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1020 transitions. [2022-01-18 05:26:59,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:26:59,089 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:59,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:26:59,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-01-18 05:26:59,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:59,303 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:26:59,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:26:59,304 INFO L85 PathProgramCache]: Analyzing trace with hash -967485590, now seen corresponding path program 7 times [2022-01-18 05:26:59,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:26:59,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291503864] [2022-01-18 05:26:59,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:26:59,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:26:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:59,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:26:59,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291503864] [2022-01-18 05:26:59,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291503864] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:26:59,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109330462] [2022-01-18 05:26:59,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:26:59,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:26:59,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:26:59,442 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:26:59,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 05:26:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:26:59,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:26:59,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:26:59,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:26:59,569 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 05:26:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:59,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:26:59,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:26:59,689 INFO L387 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 15 treesize of output 20 [2022-01-18 05:26:59,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:26:59,701 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 05:26:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:26:59,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109330462] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:26:59,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:26:59,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 05:26:59,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444852794] [2022-01-18 05:26:59,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:26:59,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:26:59,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:26:59,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:26:59,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:26:59,730 INFO L87 Difference]: Start difference. First operand 339 states and 1020 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:59,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:26:59,899 INFO L93 Difference]: Finished difference Result 409 states and 1221 transitions. [2022-01-18 05:26:59,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:26:59,900 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:26:59,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:26:59,901 INFO L225 Difference]: With dead ends: 409 [2022-01-18 05:26:59,901 INFO L226 Difference]: Without dead ends: 398 [2022-01-18 05:26:59,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:26:59,901 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 43 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:26:59,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 27 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 364 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-01-18 05:26:59,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-01-18 05:26:59,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 335. [2022-01-18 05:26:59,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.0179640718562872) internal successors, (1008), 334 states have internal predecessors, (1008), 0 states have call successors, (0), 0 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 05:26:59,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1008 transitions. [2022-01-18 05:26:59,906 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1008 transitions. Word has length 20 [2022-01-18 05:26:59,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:26:59,906 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 1008 transitions. [2022-01-18 05:26:59,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:26:59,906 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1008 transitions. [2022-01-18 05:26:59,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:26:59,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:26:59,907 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:26:59,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:00,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:00,119 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:00,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:00,120 INFO L85 PathProgramCache]: Analyzing trace with hash -20095859, now seen corresponding path program 1 times [2022-01-18 05:27:00,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:00,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769026219] [2022-01-18 05:27:00,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:00,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:00,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:00,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769026219] [2022-01-18 05:27:00,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769026219] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:00,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088000827] [2022-01-18 05:27:00,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:00,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:00,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:00,203 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:00,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 05:27:00,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:00,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:00,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:00,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:27:00,386 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 05:27:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:00,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:00,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:00,477 INFO L387 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 15 treesize of output 20 [2022-01-18 05:27:00,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:00,485 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 05:27:00,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:00,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088000827] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:00,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:00,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-01-18 05:27:00,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882632544] [2022-01-18 05:27:00,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:00,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:27:00,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:00,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:27:00,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:27:00,513 INFO L87 Difference]: Start difference. First operand 335 states and 1008 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 05:27:00,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:00,743 INFO L93 Difference]: Finished difference Result 435 states and 1270 transitions. [2022-01-18 05:27:00,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:27:00,744 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2022-01-18 05:27:00,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:00,745 INFO L225 Difference]: With dead ends: 435 [2022-01-18 05:27:00,745 INFO L226 Difference]: Without dead ends: 429 [2022-01-18 05:27:00,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:27:00,746 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 55 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:00,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 50 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 521 Invalid, 0 Unknown, 122 Unchecked, 0.2s Time] [2022-01-18 05:27:00,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-01-18 05:27:00,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 334. [2022-01-18 05:27:00,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.021021021021021) internal successors, (1006), 333 states have internal predecessors, (1006), 0 states have call successors, (0), 0 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 05:27:00,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1006 transitions. [2022-01-18 05:27:00,751 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1006 transitions. Word has length 20 [2022-01-18 05:27:00,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:00,751 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 1006 transitions. [2022-01-18 05:27:00,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 05:27:00,751 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1006 transitions. [2022-01-18 05:27:00,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:00,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:00,752 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:00,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-01-18 05:27:00,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 05:27:00,964 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:00,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:00,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1330179178, now seen corresponding path program 8 times [2022-01-18 05:27:00,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:00,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762025142] [2022-01-18 05:27:00,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:00,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:01,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:01,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762025142] [2022-01-18 05:27:01,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762025142] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:01,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336340265] [2022-01-18 05:27:01,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:27:01,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:01,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:01,055 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:01,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 05:27:01,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:27:01,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:01,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:27:01,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:01,201 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:01,201 INFO L387 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 15 treesize of output 19 [2022-01-18 05:27:01,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:01,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:01,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:01,497 INFO L387 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 24 treesize of output 25 [2022-01-18 05:27:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:01,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336340265] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:01,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:01,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-01-18 05:27:01,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896613363] [2022-01-18 05:27:01,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:01,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:27:01,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:01,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:27:01,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:27:01,613 INFO L87 Difference]: Start difference. First operand 334 states and 1006 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:27:03,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:03,076 INFO L93 Difference]: Finished difference Result 660 states and 1862 transitions. [2022-01-18 05:27:03,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 05:27:03,076 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 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 20 [2022-01-18 05:27:03,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:03,078 INFO L225 Difference]: With dead ends: 660 [2022-01-18 05:27:03,078 INFO L226 Difference]: Without dead ends: 633 [2022-01-18 05:27:03,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=545, Invalid=2535, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 05:27:03,079 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 293 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 736 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:03,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 109 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1132 Invalid, 0 Unknown, 736 Unchecked, 0.5s Time] [2022-01-18 05:27:03,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-01-18 05:27:03,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 327. [2022-01-18 05:27:03,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 3.0092024539877302) internal successors, (981), 326 states have internal predecessors, (981), 0 states have call successors, (0), 0 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 05:27:03,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 981 transitions. [2022-01-18 05:27:03,085 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 981 transitions. Word has length 20 [2022-01-18 05:27:03,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:03,085 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 981 transitions. [2022-01-18 05:27:03,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:27:03,085 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 981 transitions. [2022-01-18 05:27:03,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:03,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:03,086 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:03,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:03,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-18 05:27:03,299 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:03,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:03,300 INFO L85 PathProgramCache]: Analyzing trace with hash -353300289, now seen corresponding path program 9 times [2022-01-18 05:27:03,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:03,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483490825] [2022-01-18 05:27:03,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:03,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:03,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:03,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:03,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:03,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483490825] [2022-01-18 05:27:03,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483490825] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:03,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150536587] [2022-01-18 05:27:03,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:27:03,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:03,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:03,407 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:03,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 05:27:03,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:27:03,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:03,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:03,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:03,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:03,516 INFO L387 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 11 treesize of output 15 [2022-01-18 05:27:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:03,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:03,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:03,720 INFO L387 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 27 treesize of output 26 [2022-01-18 05:27:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:03,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150536587] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:03,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:03,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 05:27:03,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000555138] [2022-01-18 05:27:03,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:03,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:27:03,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:03,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:27:03,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:27:03,811 INFO L87 Difference]: Start difference. First operand 327 states and 981 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:27:04,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:04,185 INFO L93 Difference]: Finished difference Result 450 states and 1332 transitions. [2022-01-18 05:27:04,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:27:04,185 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 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 20 [2022-01-18 05:27:04,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:04,186 INFO L225 Difference]: With dead ends: 450 [2022-01-18 05:27:04,187 INFO L226 Difference]: Without dead ends: 440 [2022-01-18 05:27:04,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:27:04,187 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 92 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:04,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 47 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 649 Invalid, 0 Unknown, 92 Unchecked, 0.2s Time] [2022-01-18 05:27:04,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-01-18 05:27:04,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 339. [2022-01-18 05:27:04,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.0088757396449703) internal successors, (1017), 338 states have internal predecessors, (1017), 0 states have call successors, (0), 0 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 05:27:04,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1017 transitions. [2022-01-18 05:27:04,192 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1017 transitions. Word has length 20 [2022-01-18 05:27:04,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:04,192 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1017 transitions. [2022-01-18 05:27:04,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:27:04,192 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1017 transitions. [2022-01-18 05:27:04,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:04,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:04,193 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:04,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:04,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-18 05:27:04,401 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:04,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:04,401 INFO L85 PathProgramCache]: Analyzing trace with hash 214268651, now seen corresponding path program 10 times [2022-01-18 05:27:04,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:04,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048886273] [2022-01-18 05:27:04,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:04,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:04,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:04,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048886273] [2022-01-18 05:27:04,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048886273] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:04,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620911195] [2022-01-18 05:27:04,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:27:04,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:04,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:04,469 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:04,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 05:27:04,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:27:04,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:04,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:04,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:04,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:27:04,561 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 05:27:04,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:04,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:04,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:04,693 INFO L387 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 15 treesize of output 20 [2022-01-18 05:27:04,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:04,701 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 05:27:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:04,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620911195] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:04,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:04,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 05:27:04,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559564865] [2022-01-18 05:27:04,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:04,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:27:04,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:04,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:27:04,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:27:04,728 INFO L87 Difference]: Start difference. First operand 339 states and 1017 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 05:27:04,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:04,901 INFO L93 Difference]: Finished difference Result 422 states and 1257 transitions. [2022-01-18 05:27:04,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:27:04,901 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 20 [2022-01-18 05:27:04,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:04,903 INFO L225 Difference]: With dead ends: 422 [2022-01-18 05:27:04,903 INFO L226 Difference]: Without dead ends: 411 [2022-01-18 05:27:04,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:27:04,904 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 36 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:04,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 25 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:27:04,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-01-18 05:27:04,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 336. [2022-01-18 05:27:04,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.008955223880597) internal successors, (1008), 335 states have internal predecessors, (1008), 0 states have call successors, (0), 0 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 05:27:04,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1008 transitions. [2022-01-18 05:27:04,909 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1008 transitions. Word has length 20 [2022-01-18 05:27:04,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:04,909 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1008 transitions. [2022-01-18 05:27:04,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 05:27:04,909 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1008 transitions. [2022-01-18 05:27:04,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:04,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:04,910 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:04,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-01-18 05:27:05,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 05:27:05,117 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:05,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:05,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1590769142, now seen corresponding path program 9 times [2022-01-18 05:27:05,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:05,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124534280] [2022-01-18 05:27:05,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:05,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:05,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:05,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:05,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124534280] [2022-01-18 05:27:05,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124534280] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:05,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121705234] [2022-01-18 05:27:05,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:27:05,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:05,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:05,190 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:05,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 05:27:05,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:27:05,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:05,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:05,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:05,282 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:05,282 INFO L387 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 11 treesize of output 15 [2022-01-18 05:27:05,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:05,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:05,498 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:05,498 INFO L387 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 27 treesize of output 26 [2022-01-18 05:27:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:05,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121705234] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:05,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:05,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 05:27:05,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148666368] [2022-01-18 05:27:05,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:05,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:27:05,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:05,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:27:05,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:27:05,596 INFO L87 Difference]: Start difference. First operand 336 states and 1008 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:05,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:05,992 INFO L93 Difference]: Finished difference Result 436 states and 1291 transitions. [2022-01-18 05:27:05,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:27:05,992 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:27:05,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:05,993 INFO L225 Difference]: With dead ends: 436 [2022-01-18 05:27:05,994 INFO L226 Difference]: Without dead ends: 427 [2022-01-18 05:27:05,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:27:05,994 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 98 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:05,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 54 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 720 Invalid, 0 Unknown, 120 Unchecked, 0.2s Time] [2022-01-18 05:27:05,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-01-18 05:27:05,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 339. [2022-01-18 05:27:05,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.0118343195266273) internal successors, (1018), 338 states have internal predecessors, (1018), 0 states have call successors, (0), 0 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 05:27:05,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1018 transitions. [2022-01-18 05:27:05,999 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1018 transitions. Word has length 20 [2022-01-18 05:27:05,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:05,999 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1018 transitions. [2022-01-18 05:27:05,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:05,999 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1018 transitions. [2022-01-18 05:27:06,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:06,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:06,000 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:06,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:06,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 05:27:06,211 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:06,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:06,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1635909478, now seen corresponding path program 10 times [2022-01-18 05:27:06,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:06,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554260249] [2022-01-18 05:27:06,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:06,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:06,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:06,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:06,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554260249] [2022-01-18 05:27:06,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554260249] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:06,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171080619] [2022-01-18 05:27:06,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:27:06,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:06,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:06,332 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:06,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:27:06,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:06,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 05:27:06,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:06,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:06,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:27:06,425 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 05:27:06,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:06,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:06,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:06,557 INFO L387 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 15 treesize of output 20 [2022-01-18 05:27:06,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:06,565 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 05:27:06,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:06,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171080619] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:06,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:06,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 05:27:06,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696730473] [2022-01-18 05:27:06,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:06,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:27:06,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:06,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:27:06,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:27:06,592 INFO L87 Difference]: Start difference. First operand 339 states and 1018 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:06,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:06,792 INFO L93 Difference]: Finished difference Result 413 states and 1233 transitions. [2022-01-18 05:27:06,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:27:06,793 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:27:06,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:06,794 INFO L225 Difference]: With dead ends: 413 [2022-01-18 05:27:06,794 INFO L226 Difference]: Without dead ends: 402 [2022-01-18 05:27:06,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:27:06,795 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:06,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 28 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:27:06,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-01-18 05:27:06,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 336. [2022-01-18 05:27:06,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.008955223880597) internal successors, (1008), 335 states have internal predecessors, (1008), 0 states have call successors, (0), 0 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 05:27:06,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1008 transitions. [2022-01-18 05:27:06,799 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1008 transitions. Word has length 20 [2022-01-18 05:27:06,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:06,799 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1008 transitions. [2022-01-18 05:27:06,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:06,800 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1008 transitions. [2022-01-18 05:27:06,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:06,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:06,800 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:06,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-18 05:27:07,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:07,016 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:07,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:07,016 INFO L85 PathProgramCache]: Analyzing trace with hash -805583803, now seen corresponding path program 11 times [2022-01-18 05:27:07,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:07,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286242356] [2022-01-18 05:27:07,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:07,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:07,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:07,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:07,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286242356] [2022-01-18 05:27:07,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286242356] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:07,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333877231] [2022-01-18 05:27:07,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:27:07,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:07,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:07,099 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:07,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 05:27:07,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:27:07,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:07,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:07,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:07,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:27:07,227 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 05:27:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:07,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:07,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:07,341 INFO L387 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 15 treesize of output 20 [2022-01-18 05:27:07,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:07,348 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 05:27:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:07,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333877231] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:07,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:07,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 05:27:07,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535027279] [2022-01-18 05:27:07,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:07,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:27:07,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:07,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:27:07,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:27:07,380 INFO L87 Difference]: Start difference. First operand 336 states and 1008 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:07,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:07,606 INFO L93 Difference]: Finished difference Result 439 states and 1300 transitions. [2022-01-18 05:27:07,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:27:07,606 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:27:07,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:07,611 INFO L225 Difference]: With dead ends: 439 [2022-01-18 05:27:07,611 INFO L226 Difference]: Without dead ends: 428 [2022-01-18 05:27:07,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:27:07,612 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 41 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:07,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 32 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:27:07,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-01-18 05:27:07,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 339. [2022-01-18 05:27:07,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.997041420118343) internal successors, (1013), 338 states have internal predecessors, (1013), 0 states have call successors, (0), 0 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 05:27:07,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1013 transitions. [2022-01-18 05:27:07,616 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1013 transitions. Word has length 20 [2022-01-18 05:27:07,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:07,616 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1013 transitions. [2022-01-18 05:27:07,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:07,617 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1013 transitions. [2022-01-18 05:27:07,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:07,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:07,617 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:07,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:07,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-18 05:27:07,831 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:07,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:07,832 INFO L85 PathProgramCache]: Analyzing trace with hash -881419218, now seen corresponding path program 11 times [2022-01-18 05:27:07,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:07,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073448150] [2022-01-18 05:27:07,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:07,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:07,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:07,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:07,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073448150] [2022-01-18 05:27:07,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073448150] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:07,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556289956] [2022-01-18 05:27:07,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:27:07,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:07,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:07,895 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:07,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 05:27:07,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:27:07,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:07,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:07,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:08,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:27:08,003 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 05:27:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:08,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:08,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:08,124 INFO L387 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 15 treesize of output 20 [2022-01-18 05:27:08,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:08,137 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 05:27:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:08,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556289956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:08,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:08,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 05:27:08,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770230779] [2022-01-18 05:27:08,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:08,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:27:08,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:08,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:27:08,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:27:08,165 INFO L87 Difference]: Start difference. First operand 339 states and 1013 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 05:27:08,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:08,414 INFO L93 Difference]: Finished difference Result 429 states and 1275 transitions. [2022-01-18 05:27:08,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:27:08,414 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 20 [2022-01-18 05:27:08,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:08,415 INFO L225 Difference]: With dead ends: 429 [2022-01-18 05:27:08,415 INFO L226 Difference]: Without dead ends: 418 [2022-01-18 05:27:08,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:27:08,416 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 37 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:08,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 34 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:27:08,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-18 05:27:08,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 339. [2022-01-18 05:27:08,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.997041420118343) internal successors, (1013), 338 states have internal predecessors, (1013), 0 states have call successors, (0), 0 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 05:27:08,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1013 transitions. [2022-01-18 05:27:08,422 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1013 transitions. Word has length 20 [2022-01-18 05:27:08,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:08,422 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1013 transitions. [2022-01-18 05:27:08,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 05:27:08,422 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1013 transitions. [2022-01-18 05:27:08,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:08,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:08,423 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:08,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:08,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:08,634 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:08,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:08,635 INFO L85 PathProgramCache]: Analyzing trace with hash -136538836, now seen corresponding path program 12 times [2022-01-18 05:27:08,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:08,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861495902] [2022-01-18 05:27:08,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:08,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:08,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:08,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:08,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861495902] [2022-01-18 05:27:08,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861495902] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:08,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365784001] [2022-01-18 05:27:08,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:27:08,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:08,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:08,740 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:08,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 05:27:08,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:27:08,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:08,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:27:08,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:08,966 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:08,966 INFO L387 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 15 treesize of output 19 [2022-01-18 05:27:09,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:09,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:09,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:09,320 INFO L387 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 20 treesize of output 21 [2022-01-18 05:27:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:09,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365784001] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:09,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:09,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-01-18 05:27:09,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076570054] [2022-01-18 05:27:09,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:09,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:27:09,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:09,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:27:09,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:27:09,412 INFO L87 Difference]: Start difference. First operand 339 states and 1013 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:27:11,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:11,493 INFO L93 Difference]: Finished difference Result 981 states and 2663 transitions. [2022-01-18 05:27:11,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 05:27:11,495 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 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 20 [2022-01-18 05:27:11,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:11,497 INFO L225 Difference]: With dead ends: 981 [2022-01-18 05:27:11,497 INFO L226 Difference]: Without dead ends: 975 [2022-01-18 05:27:11,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 27 SyntacticMatches, 12 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=814, Invalid=5038, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 05:27:11,498 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 349 mSDsluCounter, 1052 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 3037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1809 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:11,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 147 Invalid, 3037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1148 Invalid, 0 Unknown, 1809 Unchecked, 0.4s Time] [2022-01-18 05:27:11,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-01-18 05:27:11,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 358. [2022-01-18 05:27:11,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.988795518207283) internal successors, (1067), 357 states have internal predecessors, (1067), 0 states have call successors, (0), 0 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 05:27:11,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1067 transitions. [2022-01-18 05:27:11,506 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1067 transitions. Word has length 20 [2022-01-18 05:27:11,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:11,506 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 1067 transitions. [2022-01-18 05:27:11,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:27:11,506 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1067 transitions. [2022-01-18 05:27:11,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:11,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:11,507 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:11,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-01-18 05:27:11,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:11,723 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:11,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:11,723 INFO L85 PathProgramCache]: Analyzing trace with hash -62802732, now seen corresponding path program 13 times [2022-01-18 05:27:11,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:11,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711732250] [2022-01-18 05:27:11,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:11,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:11,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:11,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:11,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:11,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711732250] [2022-01-18 05:27:11,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711732250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:11,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251733468] [2022-01-18 05:27:11,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:27:11,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:11,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:11,802 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:11,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 05:27:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:11,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:11,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:11,928 INFO L387 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 16 treesize of output 10 [2022-01-18 05:27:11,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:11,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:12,020 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:12,020 INFO L387 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 11 treesize of output 16 [2022-01-18 05:27:12,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:12,034 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 05:27:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:12,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251733468] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:12,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:12,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2022-01-18 05:27:12,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396726359] [2022-01-18 05:27:12,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:12,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 05:27:12,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:12,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 05:27:12,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-01-18 05:27:12,049 INFO L87 Difference]: Start difference. First operand 358 states and 1067 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:12,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:12,368 INFO L93 Difference]: Finished difference Result 602 states and 1749 transitions. [2022-01-18 05:27:12,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:27:12,368 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:27:12,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:12,369 INFO L225 Difference]: With dead ends: 602 [2022-01-18 05:27:12,369 INFO L226 Difference]: Without dead ends: 593 [2022-01-18 05:27:12,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:12,369 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 106 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:12,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 66 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 666 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2022-01-18 05:27:12,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-01-18 05:27:12,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 351. [2022-01-18 05:27:12,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.98) internal successors, (1043), 350 states have internal predecessors, (1043), 0 states have call successors, (0), 0 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 05:27:12,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1043 transitions. [2022-01-18 05:27:12,375 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1043 transitions. Word has length 20 [2022-01-18 05:27:12,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:12,375 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 1043 transitions. [2022-01-18 05:27:12,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:12,375 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1043 transitions. [2022-01-18 05:27:12,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:12,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:12,376 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:12,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:12,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-01-18 05:27:12,576 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:12,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:12,577 INFO L85 PathProgramCache]: Analyzing trace with hash -2099652405, now seen corresponding path program 12 times [2022-01-18 05:27:12,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:12,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466699808] [2022-01-18 05:27:12,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:12,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:12,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:12,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466699808] [2022-01-18 05:27:12,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466699808] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:12,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649731622] [2022-01-18 05:27:12,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:27:12,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:12,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:12,659 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:12,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 05:27:12,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:27:12,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:12,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:27:12,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:12,863 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:12,863 INFO L387 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 11 treesize of output 15 [2022-01-18 05:27:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:12,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:13,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:13,188 INFO L387 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 24 treesize of output 25 [2022-01-18 05:27:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:13,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649731622] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:13,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:13,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-01-18 05:27:13,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992106841] [2022-01-18 05:27:13,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:13,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:27:13,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:13,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:27:13,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:27:13,299 INFO L87 Difference]: Start difference. First operand 351 states and 1043 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:14,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:14,265 INFO L93 Difference]: Finished difference Result 587 states and 1698 transitions. [2022-01-18 05:27:14,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 05:27:14,265 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:27:14,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:14,266 INFO L225 Difference]: With dead ends: 587 [2022-01-18 05:27:14,266 INFO L226 Difference]: Without dead ends: 558 [2022-01-18 05:27:14,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=368, Invalid=1524, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 05:27:14,267 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 296 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 728 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:14,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 104 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 984 Invalid, 0 Unknown, 728 Unchecked, 0.4s Time] [2022-01-18 05:27:14,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-01-18 05:27:14,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 360. [2022-01-18 05:27:14,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.0) internal successors, (1077), 359 states have internal predecessors, (1077), 0 states have call successors, (0), 0 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 05:27:14,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1077 transitions. [2022-01-18 05:27:14,272 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1077 transitions. Word has length 20 [2022-01-18 05:27:14,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:14,272 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 1077 transitions. [2022-01-18 05:27:14,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:14,272 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1077 transitions. [2022-01-18 05:27:14,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:14,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:14,273 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:14,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-01-18 05:27:14,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 05:27:14,473 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:14,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:14,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1481560959, now seen corresponding path program 13 times [2022-01-18 05:27:14,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:14,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945017091] [2022-01-18 05:27:14,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:14,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:14,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:14,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:14,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945017091] [2022-01-18 05:27:14,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945017091] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:14,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270232794] [2022-01-18 05:27:14,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:27:14,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:14,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:14,545 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:14,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 05:27:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:14,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:14,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:14,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:27:14,645 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 05:27:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:14,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:14,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:14,777 INFO L387 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 15 treesize of output 20 [2022-01-18 05:27:14,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:14,785 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 05:27:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:14,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270232794] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:14,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:14,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 05:27:14,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415091184] [2022-01-18 05:27:14,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:14,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:27:14,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:14,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:27:14,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:27:14,803 INFO L87 Difference]: Start difference. First operand 360 states and 1077 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 05:27:15,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:15,095 INFO L93 Difference]: Finished difference Result 457 states and 1351 transitions. [2022-01-18 05:27:15,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:27:15,095 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 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 20 [2022-01-18 05:27:15,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:15,096 INFO L225 Difference]: With dead ends: 457 [2022-01-18 05:27:15,096 INFO L226 Difference]: Without dead ends: 447 [2022-01-18 05:27:15,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:27:15,097 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:15,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 60 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:27:15,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-18 05:27:15,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 363. [2022-01-18 05:27:15,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.0) internal successors, (1086), 362 states have internal predecessors, (1086), 0 states have call successors, (0), 0 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 05:27:15,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1086 transitions. [2022-01-18 05:27:15,101 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1086 transitions. Word has length 20 [2022-01-18 05:27:15,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:15,102 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 1086 transitions. [2022-01-18 05:27:15,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 05:27:15,102 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1086 transitions. [2022-01-18 05:27:15,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:15,102 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:15,102 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:15,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:15,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-18 05:27:15,318 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:15,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:15,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1979667897, now seen corresponding path program 14 times [2022-01-18 05:27:15,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:15,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660758799] [2022-01-18 05:27:15,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:15,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:15,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:15,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:15,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660758799] [2022-01-18 05:27:15,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660758799] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:15,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190499404] [2022-01-18 05:27:15,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:27:15,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:15,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:15,388 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:15,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 05:27:15,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:27:15,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:15,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:27:15,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:15,491 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:15,491 INFO L387 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 11 treesize of output 15 [2022-01-18 05:27:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:15,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:15,819 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:15,819 INFO L387 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 24 treesize of output 25 [2022-01-18 05:27:15,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:15,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190499404] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:15,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:15,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-01-18 05:27:15,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503776845] [2022-01-18 05:27:15,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:15,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:27:15,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:15,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:27:15,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:27:15,927 INFO L87 Difference]: Start difference. First operand 363 states and 1086 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:17,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:17,765 INFO L93 Difference]: Finished difference Result 663 states and 1878 transitions. [2022-01-18 05:27:17,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 05:27:17,765 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:27:17,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:17,767 INFO L225 Difference]: With dead ends: 663 [2022-01-18 05:27:17,767 INFO L226 Difference]: Without dead ends: 631 [2022-01-18 05:27:17,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=782, Invalid=2758, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 05:27:17,768 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 318 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 1484 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:17,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 112 Invalid, 1826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1484 Invalid, 0 Unknown, 204 Unchecked, 0.6s Time] [2022-01-18 05:27:17,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-01-18 05:27:17,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 363. [2022-01-18 05:27:17,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.0) internal successors, (1086), 362 states have internal predecessors, (1086), 0 states have call successors, (0), 0 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 05:27:17,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1086 transitions. [2022-01-18 05:27:17,773 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1086 transitions. Word has length 20 [2022-01-18 05:27:17,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:17,773 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 1086 transitions. [2022-01-18 05:27:17,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:17,774 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1086 transitions. [2022-01-18 05:27:17,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:17,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:17,774 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:17,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:17,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:17,991 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:17,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:17,992 INFO L85 PathProgramCache]: Analyzing trace with hash 2061801888, now seen corresponding path program 14 times [2022-01-18 05:27:17,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:17,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518378531] [2022-01-18 05:27:17,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:17,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:18,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:18,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518378531] [2022-01-18 05:27:18,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518378531] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:18,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290582867] [2022-01-18 05:27:18,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:27:18,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:18,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:18,073 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:18,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 05:27:18,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:27:18,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:18,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:27:18,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:18,256 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:18,256 INFO L387 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 11 treesize of output 15 [2022-01-18 05:27:18,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:18,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:18,553 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:18,553 INFO L387 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 24 treesize of output 25 [2022-01-18 05:27:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:18,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290582867] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:18,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:18,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-01-18 05:27:18,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746511220] [2022-01-18 05:27:18,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:18,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:27:18,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:18,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:27:18,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:27:18,674 INFO L87 Difference]: Start difference. First operand 363 states and 1086 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:19,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:19,752 INFO L93 Difference]: Finished difference Result 593 states and 1695 transitions. [2022-01-18 05:27:19,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 05:27:19,752 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:27:19,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:19,753 INFO L225 Difference]: With dead ends: 593 [2022-01-18 05:27:19,753 INFO L226 Difference]: Without dead ends: 562 [2022-01-18 05:27:19,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=414, Invalid=1656, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:27:19,754 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 242 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 338 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:19,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 112 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1018 Invalid, 0 Unknown, 338 Unchecked, 0.4s Time] [2022-01-18 05:27:19,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-01-18 05:27:19,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 373. [2022-01-18 05:27:19,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 3.0188172043010755) internal successors, (1123), 372 states have internal predecessors, (1123), 0 states have call successors, (0), 0 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 05:27:19,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1123 transitions. [2022-01-18 05:27:19,759 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1123 transitions. Word has length 20 [2022-01-18 05:27:19,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:19,759 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 1123 transitions. [2022-01-18 05:27:19,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:19,760 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1123 transitions. [2022-01-18 05:27:19,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:19,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:19,760 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:19,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:19,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-01-18 05:27:19,961 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:19,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:19,961 INFO L85 PathProgramCache]: Analyzing trace with hash 175206200, now seen corresponding path program 15 times [2022-01-18 05:27:19,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:19,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140382] [2022-01-18 05:27:19,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:19,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:20,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:20,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:20,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140382] [2022-01-18 05:27:20,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:20,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478117975] [2022-01-18 05:27:20,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:27:20,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:20,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:20,044 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:20,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 05:27:20,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:27:20,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:20,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:27:20,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:20,160 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:20,160 INFO L387 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 11 treesize of output 15 [2022-01-18 05:27:20,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:20,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:20,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:20,477 INFO L387 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 24 treesize of output 25 [2022-01-18 05:27:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:20,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478117975] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:20,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:20,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-01-18 05:27:20,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497231352] [2022-01-18 05:27:20,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:20,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:27:20,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:20,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:27:20,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:27:20,581 INFO L87 Difference]: Start difference. First operand 373 states and 1123 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:21,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:21,946 INFO L93 Difference]: Finished difference Result 610 states and 1761 transitions. [2022-01-18 05:27:21,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 05:27:21,946 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:27:21,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:21,947 INFO L225 Difference]: With dead ends: 610 [2022-01-18 05:27:21,947 INFO L226 Difference]: Without dead ends: 583 [2022-01-18 05:27:21,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=539, Invalid=2011, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 05:27:21,948 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 285 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:21,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 71 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 871 Invalid, 0 Unknown, 206 Unchecked, 0.4s Time] [2022-01-18 05:27:21,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-01-18 05:27:21,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 376. [2022-01-18 05:27:21,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.021333333333333) internal successors, (1133), 375 states have internal predecessors, (1133), 0 states have call successors, (0), 0 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 05:27:21,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1133 transitions. [2022-01-18 05:27:21,953 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1133 transitions. Word has length 20 [2022-01-18 05:27:21,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:21,953 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 1133 transitions. [2022-01-18 05:27:21,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:21,953 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1133 transitions. [2022-01-18 05:27:21,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:21,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:21,954 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:21,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:22,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 05:27:22,159 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:22,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:22,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1243494876, now seen corresponding path program 16 times [2022-01-18 05:27:22,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:22,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484973729] [2022-01-18 05:27:22,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:22,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:22,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:22,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:22,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484973729] [2022-01-18 05:27:22,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484973729] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:22,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846590237] [2022-01-18 05:27:22,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:27:22,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:22,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:22,245 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:22,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 05:27:22,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:27:22,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:22,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:22,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:22,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:27:22,357 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 05:27:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:22,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:22,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:22,477 INFO L387 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 15 treesize of output 20 [2022-01-18 05:27:22,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:22,485 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 05:27:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:22,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846590237] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:22,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:22,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 05:27:22,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16211852] [2022-01-18 05:27:22,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:22,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:27:22,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:22,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:27:22,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:27:22,508 INFO L87 Difference]: Start difference. First operand 376 states and 1133 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:22,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:22,753 INFO L93 Difference]: Finished difference Result 457 states and 1362 transitions. [2022-01-18 05:27:22,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:27:22,753 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:27:22,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:22,754 INFO L225 Difference]: With dead ends: 457 [2022-01-18 05:27:22,754 INFO L226 Difference]: Without dead ends: 446 [2022-01-18 05:27:22,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:27:22,754 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 47 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:22,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 44 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:27:22,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-01-18 05:27:22,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 371. [2022-01-18 05:27:22,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 3.018918918918919) internal successors, (1117), 370 states have internal predecessors, (1117), 0 states have call successors, (0), 0 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 05:27:22,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1117 transitions. [2022-01-18 05:27:22,759 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1117 transitions. Word has length 20 [2022-01-18 05:27:22,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:22,759 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1117 transitions. [2022-01-18 05:27:22,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:22,759 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1117 transitions. [2022-01-18 05:27:22,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:22,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:22,760 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:22,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-01-18 05:27:22,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:22,975 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:22,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:22,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1857680177, now seen corresponding path program 15 times [2022-01-18 05:27:22,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:22,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892040702] [2022-01-18 05:27:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:22,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:23,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:23,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892040702] [2022-01-18 05:27:23,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892040702] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:23,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2517224] [2022-01-18 05:27:23,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:27:23,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:23,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:23,069 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:23,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 05:27:23,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:27:23,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:23,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:23,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:23,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:23,188 INFO L387 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 11 treesize of output 15 [2022-01-18 05:27:23,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:23,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:23,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:23,417 INFO L387 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 27 treesize of output 26 [2022-01-18 05:27:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:23,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2517224] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:23,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:23,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-01-18 05:27:23,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574225614] [2022-01-18 05:27:23,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:23,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:27:23,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:23,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:27:23,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:27:23,498 INFO L87 Difference]: Start difference. First operand 371 states and 1117 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 05:27:23,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:23,848 INFO L93 Difference]: Finished difference Result 520 states and 1540 transitions. [2022-01-18 05:27:23,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:27:23,848 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 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 20 [2022-01-18 05:27:23,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:23,849 INFO L225 Difference]: With dead ends: 520 [2022-01-18 05:27:23,849 INFO L226 Difference]: Without dead ends: 511 [2022-01-18 05:27:23,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:27:23,850 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 118 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:23,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 43 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 420 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2022-01-18 05:27:23,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-01-18 05:27:23,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 378. [2022-01-18 05:27:23,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 3.018567639257294) internal successors, (1138), 377 states have internal predecessors, (1138), 0 states have call successors, (0), 0 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 05:27:23,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1138 transitions. [2022-01-18 05:27:23,855 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1138 transitions. Word has length 20 [2022-01-18 05:27:23,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:23,855 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1138 transitions. [2022-01-18 05:27:23,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 05:27:23,855 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1138 transitions. [2022-01-18 05:27:23,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:23,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:23,856 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:23,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:24,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-01-18 05:27:24,056 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:24,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:24,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1869718179, now seen corresponding path program 16 times [2022-01-18 05:27:24,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:24,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025156601] [2022-01-18 05:27:24,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:24,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:24,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:24,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025156601] [2022-01-18 05:27:24,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025156601] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:24,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838952905] [2022-01-18 05:27:24,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:27:24,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:24,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:24,134 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:24,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 05:27:24,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:27:24,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:24,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:24,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:24,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:27:24,231 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 05:27:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:24,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:24,361 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:24,361 INFO L387 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 15 treesize of output 20 [2022-01-18 05:27:24,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:24,369 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 05:27:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:24,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838952905] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:24,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:24,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 05:27:24,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566622371] [2022-01-18 05:27:24,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:24,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:27:24,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:24,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:27:24,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:27:24,393 INFO L87 Difference]: Start difference. First operand 378 states and 1138 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:24,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:24,556 INFO L93 Difference]: Finished difference Result 458 states and 1362 transitions. [2022-01-18 05:27:24,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:27:24,556 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:27:24,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:24,557 INFO L225 Difference]: With dead ends: 458 [2022-01-18 05:27:24,557 INFO L226 Difference]: Without dead ends: 448 [2022-01-18 05:27:24,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:27:24,557 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 42 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:24,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 34 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 381 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-01-18 05:27:24,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-01-18 05:27:24,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 378. [2022-01-18 05:27:24,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 3.018567639257294) internal successors, (1138), 377 states have internal predecessors, (1138), 0 states have call successors, (0), 0 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 05:27:24,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1138 transitions. [2022-01-18 05:27:24,565 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1138 transitions. Word has length 20 [2022-01-18 05:27:24,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:24,566 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1138 transitions. [2022-01-18 05:27:24,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:24,566 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1138 transitions. [2022-01-18 05:27:24,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:24,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:24,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:24,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:24,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:24,767 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:24,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:24,767 INFO L85 PathProgramCache]: Analyzing trace with hash -493217688, now seen corresponding path program 17 times [2022-01-18 05:27:24,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:24,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977363860] [2022-01-18 05:27:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:24,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:24,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:24,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:24,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977363860] [2022-01-18 05:27:24,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977363860] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:24,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18343531] [2022-01-18 05:27:24,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:27:24,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:24,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:24,834 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:24,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 05:27:24,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:27:24,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:24,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:24,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:24,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:27:24,930 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 05:27:25,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:25,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:25,076 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:25,076 INFO L387 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 15 treesize of output 20 [2022-01-18 05:27:25,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:25,083 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 05:27:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:25,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18343531] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:25,106 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:25,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 05:27:25,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217573702] [2022-01-18 05:27:25,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:25,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:27:25,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:25,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:27:25,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:27:25,107 INFO L87 Difference]: Start difference. First operand 378 states and 1138 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 05:27:25,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:25,270 INFO L93 Difference]: Finished difference Result 466 states and 1385 transitions. [2022-01-18 05:27:25,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:27:25,270 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 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 20 [2022-01-18 05:27:25,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:25,271 INFO L225 Difference]: With dead ends: 466 [2022-01-18 05:27:25,271 INFO L226 Difference]: Without dead ends: 457 [2022-01-18 05:27:25,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:27:25,272 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:25,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 36 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 375 Invalid, 0 Unknown, 5 Unchecked, 0.1s Time] [2022-01-18 05:27:25,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-01-18 05:27:25,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 381. [2022-01-18 05:27:25,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 3.0210526315789474) internal successors, (1148), 380 states have internal predecessors, (1148), 0 states have call successors, (0), 0 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 05:27:25,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1148 transitions. [2022-01-18 05:27:25,277 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1148 transitions. Word has length 20 [2022-01-18 05:27:25,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:25,277 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 1148 transitions. [2022-01-18 05:27:25,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 05:27:25,277 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1148 transitions. [2022-01-18 05:27:25,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:25,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:25,277 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:25,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:25,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:25,483 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:25,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:25,488 INFO L85 PathProgramCache]: Analyzing trace with hash 575070988, now seen corresponding path program 18 times [2022-01-18 05:27:25,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:25,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166590873] [2022-01-18 05:27:25,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:25,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:25,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:25,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:25,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166590873] [2022-01-18 05:27:25,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166590873] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:25,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229902221] [2022-01-18 05:27:25,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:27:25,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:25,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:25,554 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:25,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 05:27:25,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:27:25,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:25,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 05:27:25,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:25,640 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:25,640 INFO L387 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 11 treesize of output 15 [2022-01-18 05:27:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:25,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:25,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:25,869 INFO L387 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 28 treesize of output 27 [2022-01-18 05:27:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:25,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229902221] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:25,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:25,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-01-18 05:27:25,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959044795] [2022-01-18 05:27:25,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:25,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:27:25,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:25,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:27:25,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:25,957 INFO L87 Difference]: Start difference. First operand 381 states and 1148 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:27,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:27,177 INFO L93 Difference]: Finished difference Result 665 states and 1934 transitions. [2022-01-18 05:27:27,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 05:27:27,177 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:27:27,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:27,178 INFO L225 Difference]: With dead ends: 665 [2022-01-18 05:27:27,178 INFO L226 Difference]: Without dead ends: 641 [2022-01-18 05:27:27,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=440, Invalid=1816, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 05:27:27,179 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 230 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:27,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 86 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:27:27,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-01-18 05:27:27,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 392. [2022-01-18 05:27:27,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.040920716112532) internal successors, (1189), 391 states have internal predecessors, (1189), 0 states have call successors, (0), 0 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 05:27:27,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1189 transitions. [2022-01-18 05:27:27,185 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1189 transitions. Word has length 20 [2022-01-18 05:27:27,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:27,185 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1189 transitions. [2022-01-18 05:27:27,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:27,185 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1189 transitions. [2022-01-18 05:27:27,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:27,186 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:27,186 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:27,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:27,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-01-18 05:27:27,391 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:27,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:27,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1405396663, now seen corresponding path program 17 times [2022-01-18 05:27:27,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:27,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534583437] [2022-01-18 05:27:27,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:27,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:27,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:27,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534583437] [2022-01-18 05:27:27,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534583437] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:27,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154129466] [2022-01-18 05:27:27,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:27:27,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:27,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:27,459 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:27,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 05:27:27,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:27:27,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:27,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:27,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:27,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:27:27,580 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 05:27:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:27,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:27,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:27,706 INFO L387 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 15 treesize of output 20 [2022-01-18 05:27:27,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:27,714 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 05:27:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:27,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154129466] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:27,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:27,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 05:27:27,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859802296] [2022-01-18 05:27:27,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:27,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:27:27,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:27,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:27:27,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:27:27,761 INFO L87 Difference]: Start difference. First operand 392 states and 1189 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 05:27:27,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:27,933 INFO L93 Difference]: Finished difference Result 487 states and 1457 transitions. [2022-01-18 05:27:27,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:27:27,933 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 20 [2022-01-18 05:27:27,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:27,934 INFO L225 Difference]: With dead ends: 487 [2022-01-18 05:27:27,934 INFO L226 Difference]: Without dead ends: 476 [2022-01-18 05:27:27,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:27:27,935 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 52 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:27,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 33 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 336 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2022-01-18 05:27:27,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-01-18 05:27:27,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 398. [2022-01-18 05:27:27,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 3.0352644836272042) internal successors, (1205), 397 states have internal predecessors, (1205), 0 states have call successors, (0), 0 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 05:27:27,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1205 transitions. [2022-01-18 05:27:27,940 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1205 transitions. Word has length 20 [2022-01-18 05:27:27,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:27,940 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1205 transitions. [2022-01-18 05:27:27,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 05:27:27,940 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1205 transitions. [2022-01-18 05:27:27,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:27,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:27,941 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:27,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-01-18 05:27:28,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-18 05:27:28,141 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:28,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:28,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1329561248, now seen corresponding path program 19 times [2022-01-18 05:27:28,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:28,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840794178] [2022-01-18 05:27:28,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:28,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:28,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:28,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840794178] [2022-01-18 05:27:28,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840794178] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:28,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317866595] [2022-01-18 05:27:28,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:27:28,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:28,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:28,214 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:28,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 05:27:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:28,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:28,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:28,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:27:28,337 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 05:27:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:28,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:28,456 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:28,456 INFO L387 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 15 treesize of output 20 [2022-01-18 05:27:28,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:28,472 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 05:27:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:28,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317866595] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:28,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:28,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 05:27:28,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940656362] [2022-01-18 05:27:28,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:28,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:27:28,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:28,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:27:28,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:27:28,495 INFO L87 Difference]: Start difference. First operand 398 states and 1205 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:28,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:28,707 INFO L93 Difference]: Finished difference Result 469 states and 1405 transitions. [2022-01-18 05:27:28,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:27:28,709 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:27:28,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:28,710 INFO L225 Difference]: With dead ends: 469 [2022-01-18 05:27:28,710 INFO L226 Difference]: Without dead ends: 458 [2022-01-18 05:27:28,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:27:28,710 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:28,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 52 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 491 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2022-01-18 05:27:28,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-01-18 05:27:28,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 399. [2022-01-18 05:27:28,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.0376884422110555) internal successors, (1209), 398 states have internal predecessors, (1209), 0 states have call successors, (0), 0 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 05:27:28,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1209 transitions. [2022-01-18 05:27:28,715 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1209 transitions. Word has length 20 [2022-01-18 05:27:28,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:28,715 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1209 transitions. [2022-01-18 05:27:28,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:28,715 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1209 transitions. [2022-01-18 05:27:28,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:28,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:28,716 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:28,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:28,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-01-18 05:27:28,919 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:28,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:28,919 INFO L85 PathProgramCache]: Analyzing trace with hash 705118312, now seen corresponding path program 20 times [2022-01-18 05:27:28,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:28,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383517088] [2022-01-18 05:27:28,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:28,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:29,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:29,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:29,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383517088] [2022-01-18 05:27:29,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383517088] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:29,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612913790] [2022-01-18 05:27:29,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:27:29,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:29,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:29,026 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:29,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 05:27:29,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:27:29,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:29,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:29,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:29,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:29,174 INFO L387 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 16 treesize of output 18 [2022-01-18 05:27:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:29,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:29,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:29,471 INFO L387 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 28 treesize of output 27 [2022-01-18 05:27:29,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:29,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612913790] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:29,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:29,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:27:29,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905308026] [2022-01-18 05:27:29,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:29,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:27:29,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:29,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:27:29,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:29,566 INFO L87 Difference]: Start difference. First operand 399 states and 1209 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 05:27:30,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:30,274 INFO L93 Difference]: Finished difference Result 663 states and 1893 transitions. [2022-01-18 05:27:30,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 05:27:30,275 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 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 20 [2022-01-18 05:27:30,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:30,276 INFO L225 Difference]: With dead ends: 663 [2022-01-18 05:27:30,276 INFO L226 Difference]: Without dead ends: 610 [2022-01-18 05:27:30,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 05:27:30,276 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 155 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 322 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:30,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 80 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 822 Invalid, 0 Unknown, 322 Unchecked, 0.3s Time] [2022-01-18 05:27:30,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-01-18 05:27:30,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 400. [2022-01-18 05:27:30,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.0426065162907268) internal successors, (1214), 399 states have internal predecessors, (1214), 0 states have call successors, (0), 0 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 05:27:30,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1214 transitions. [2022-01-18 05:27:30,282 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1214 transitions. Word has length 20 [2022-01-18 05:27:30,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:30,283 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1214 transitions. [2022-01-18 05:27:30,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 05:27:30,283 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1214 transitions. [2022-01-18 05:27:30,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:30,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:30,283 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:30,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:30,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:30,499 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:30,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:30,499 INFO L85 PathProgramCache]: Analyzing trace with hash -422673061, now seen corresponding path program 18 times [2022-01-18 05:27:30,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:30,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075698426] [2022-01-18 05:27:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:30,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:30,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:30,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075698426] [2022-01-18 05:27:30,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075698426] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:30,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907669946] [2022-01-18 05:27:30,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:27:30,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:30,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:30,587 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:30,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:27:30,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:30,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:27:30,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:30,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 05:27:30,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:30,677 INFO L387 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 11 treesize of output 15 [2022-01-18 05:27:30,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:30,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:30,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:30,989 INFO L387 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 28 treesize of output 27 [2022-01-18 05:27:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:31,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907669946] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:31,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:31,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-01-18 05:27:31,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541085870] [2022-01-18 05:27:31,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:31,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:27:31,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:31,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:27:31,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:31,084 INFO L87 Difference]: Start difference. First operand 400 states and 1214 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:32,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:32,921 INFO L93 Difference]: Finished difference Result 835 states and 2438 transitions. [2022-01-18 05:27:32,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 05:27:32,921 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:27:32,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:32,932 INFO L225 Difference]: With dead ends: 835 [2022-01-18 05:27:32,932 INFO L226 Difference]: Without dead ends: 806 [2022-01-18 05:27:32,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=690, Invalid=3216, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 05:27:32,933 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 362 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 1219 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:32,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 89 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1219 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:27:32,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-01-18 05:27:32,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 401. [2022-01-18 05:27:32,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.0425) internal successors, (1217), 400 states have internal predecessors, (1217), 0 states have call successors, (0), 0 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 05:27:32,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1217 transitions. [2022-01-18 05:27:32,940 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1217 transitions. Word has length 20 [2022-01-18 05:27:32,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:32,940 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1217 transitions. [2022-01-18 05:27:32,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:32,940 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1217 transitions. [2022-01-18 05:27:32,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:32,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:32,941 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:32,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:33,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-18 05:27:33,145 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:33,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:33,145 INFO L85 PathProgramCache]: Analyzing trace with hash -856702407, now seen corresponding path program 19 times [2022-01-18 05:27:33,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:33,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9592712] [2022-01-18 05:27:33,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:33,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:33,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:33,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9592712] [2022-01-18 05:27:33,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9592712] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:33,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565516902] [2022-01-18 05:27:33,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:27:33,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:33,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:33,233 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:33,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 05:27:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:33,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:33,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:33,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:27:33,319 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 05:27:33,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:33,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:33,450 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:33,450 INFO L387 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 15 treesize of output 20 [2022-01-18 05:27:33,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:33,458 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 05:27:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:33,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565516902] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:33,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:33,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 05:27:33,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44802603] [2022-01-18 05:27:33,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:33,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:27:33,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:33,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:27:33,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:27:33,477 INFO L87 Difference]: Start difference. First operand 401 states and 1217 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:33,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:33,667 INFO L93 Difference]: Finished difference Result 506 states and 1512 transitions. [2022-01-18 05:27:33,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:27:33,667 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:27:33,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:33,668 INFO L225 Difference]: With dead ends: 506 [2022-01-18 05:27:33,668 INFO L226 Difference]: Without dead ends: 495 [2022-01-18 05:27:33,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:27:33,669 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 46 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:33,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 38 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 468 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2022-01-18 05:27:33,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-01-18 05:27:33,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 396. [2022-01-18 05:27:33,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.0405063291139243) internal successors, (1201), 395 states have internal predecessors, (1201), 0 states have call successors, (0), 0 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 05:27:33,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1201 transitions. [2022-01-18 05:27:33,674 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1201 transitions. Word has length 20 [2022-01-18 05:27:33,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:33,674 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1201 transitions. [2022-01-18 05:27:33,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:33,674 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1201 transitions. [2022-01-18 05:27:33,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:33,675 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:33,675 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:33,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:33,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-18 05:27:33,890 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:33,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:33,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1388007308, now seen corresponding path program 21 times [2022-01-18 05:27:33,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:33,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729965881] [2022-01-18 05:27:33,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:33,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:34,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:34,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:34,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729965881] [2022-01-18 05:27:34,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729965881] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:34,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835178026] [2022-01-18 05:27:34,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:27:34,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:34,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:34,046 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:34,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 05:27:34,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:27:34,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:34,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:34,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:34,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:34,167 INFO L387 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 11 treesize of output 15 [2022-01-18 05:27:34,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:34,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:34,438 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:34,439 INFO L387 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 27 treesize of output 26 [2022-01-18 05:27:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:34,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835178026] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:34,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:34,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-01-18 05:27:34,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814326516] [2022-01-18 05:27:34,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:34,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:27:34,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:34,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:27:34,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:27:34,521 INFO L87 Difference]: Start difference. First operand 396 states and 1201 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 05:27:34,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:34,896 INFO L93 Difference]: Finished difference Result 552 states and 1638 transitions. [2022-01-18 05:27:34,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:27:34,897 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 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 20 [2022-01-18 05:27:34,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:34,898 INFO L225 Difference]: With dead ends: 552 [2022-01-18 05:27:34,898 INFO L226 Difference]: Without dead ends: 543 [2022-01-18 05:27:34,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:27:34,898 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 119 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:34,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 46 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 488 Invalid, 0 Unknown, 142 Unchecked, 0.2s Time] [2022-01-18 05:27:34,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-01-18 05:27:34,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 393. [2022-01-18 05:27:34,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 3.0331632653061225) internal successors, (1189), 392 states have internal predecessors, (1189), 0 states have call successors, (0), 0 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 05:27:34,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1189 transitions. [2022-01-18 05:27:34,904 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1189 transitions. Word has length 20 [2022-01-18 05:27:34,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:34,904 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1189 transitions. [2022-01-18 05:27:34,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 05:27:34,904 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1189 transitions. [2022-01-18 05:27:34,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:34,904 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:34,905 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:34,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-01-18 05:27:35,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:35,105 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:35,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:35,105 INFO L85 PathProgramCache]: Analyzing trace with hash 377918803, now seen corresponding path program 20 times [2022-01-18 05:27:35,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:35,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423531172] [2022-01-18 05:27:35,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:35,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:35,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:35,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:35,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:35,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423531172] [2022-01-18 05:27:35,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423531172] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:35,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118930531] [2022-01-18 05:27:35,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:27:35,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:35,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:35,178 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:35,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 05:27:35,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:27:35,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:35,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:35,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:35,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:27:35,264 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 05:27:35,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:35,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:35,417 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:35,418 INFO L387 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 11 treesize of output 16 [2022-01-18 05:27:35,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:35,425 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 05:27:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:35,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118930531] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:35,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:35,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 05:27:35,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930569097] [2022-01-18 05:27:35,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:35,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:27:35,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:35,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:27:35,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:27:35,430 INFO L87 Difference]: Start difference. First operand 393 states and 1189 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 05:27:35,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:35,706 INFO L93 Difference]: Finished difference Result 540 states and 1607 transitions. [2022-01-18 05:27:35,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:27:35,707 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 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 20 [2022-01-18 05:27:35,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:35,708 INFO L225 Difference]: With dead ends: 540 [2022-01-18 05:27:35,708 INFO L226 Difference]: Without dead ends: 530 [2022-01-18 05:27:35,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:35,708 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 83 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:35,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 68 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 655 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2022-01-18 05:27:35,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-01-18 05:27:35,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 396. [2022-01-18 05:27:35,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.027848101265823) internal successors, (1196), 395 states have internal predecessors, (1196), 0 states have call successors, (0), 0 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 05:27:35,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1196 transitions. [2022-01-18 05:27:35,713 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1196 transitions. Word has length 20 [2022-01-18 05:27:35,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:35,714 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1196 transitions. [2022-01-18 05:27:35,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 05:27:35,714 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1196 transitions. [2022-01-18 05:27:35,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:35,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:35,714 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:35,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-01-18 05:27:35,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-01-18 05:27:35,919 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:35,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:35,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1374169437, now seen corresponding path program 21 times [2022-01-18 05:27:35,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:35,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318466186] [2022-01-18 05:27:35,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:35,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:35,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:35,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318466186] [2022-01-18 05:27:35,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318466186] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:35,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095112514] [2022-01-18 05:27:35,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:27:35,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:35,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:35,988 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:35,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 05:27:36,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:27:36,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:36,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:36,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:36,093 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:36,093 INFO L387 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 11 treesize of output 15 [2022-01-18 05:27:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:36,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:36,442 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:36,442 INFO L387 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 24 treesize of output 23 [2022-01-18 05:27:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:36,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095112514] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:36,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:36,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 05:27:36,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826759591] [2022-01-18 05:27:36,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:36,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:27:36,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:36,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:27:36,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:27:36,479 INFO L87 Difference]: Start difference. First operand 396 states and 1196 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 05:27:37,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:37,012 INFO L93 Difference]: Finished difference Result 576 states and 1697 transitions. [2022-01-18 05:27:37,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 05:27:37,012 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 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 20 [2022-01-18 05:27:37,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:37,013 INFO L225 Difference]: With dead ends: 576 [2022-01-18 05:27:37,013 INFO L226 Difference]: Without dead ends: 565 [2022-01-18 05:27:37,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:27:37,014 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 100 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 332 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:37,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 118 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 880 Invalid, 0 Unknown, 332 Unchecked, 0.3s Time] [2022-01-18 05:27:37,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-01-18 05:27:37,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 399. [2022-01-18 05:27:37,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.027638190954774) internal successors, (1205), 398 states have internal predecessors, (1205), 0 states have call successors, (0), 0 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 05:27:37,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1205 transitions. [2022-01-18 05:27:37,019 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1205 transitions. Word has length 20 [2022-01-18 05:27:37,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:37,020 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1205 transitions. [2022-01-18 05:27:37,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 05:27:37,020 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1205 transitions. [2022-01-18 05:27:37,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:37,020 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:37,020 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:37,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:37,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:37,236 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:37,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:37,236 INFO L85 PathProgramCache]: Analyzing trace with hash 646299815, now seen corresponding path program 22 times [2022-01-18 05:27:37,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:37,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091602130] [2022-01-18 05:27:37,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:37,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:37,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:37,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091602130] [2022-01-18 05:27:37,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091602130] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:37,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014361514] [2022-01-18 05:27:37,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:27:37,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:37,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:37,301 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:37,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 05:27:37,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:27:37,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:37,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:37,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:37,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:27:37,401 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 05:27:37,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:37,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:37,555 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:37,556 INFO L387 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 11 treesize of output 16 [2022-01-18 05:27:37,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:37,563 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 05:27:37,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:37,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014361514] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:37,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:37,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 05:27:37,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467877958] [2022-01-18 05:27:37,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:37,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:27:37,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:37,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:27:37,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:27:37,568 INFO L87 Difference]: Start difference. First operand 399 states and 1205 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 05:27:37,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:37,859 INFO L93 Difference]: Finished difference Result 558 states and 1655 transitions. [2022-01-18 05:27:37,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:27:37,860 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 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 20 [2022-01-18 05:27:37,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:37,861 INFO L225 Difference]: With dead ends: 558 [2022-01-18 05:27:37,861 INFO L226 Difference]: Without dead ends: 549 [2022-01-18 05:27:37,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:37,861 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:37,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 68 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 703 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2022-01-18 05:27:37,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-01-18 05:27:37,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 397. [2022-01-18 05:27:37,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.0277777777777777) internal successors, (1199), 396 states have internal predecessors, (1199), 0 states have call successors, (0), 0 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 05:27:37,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1199 transitions. [2022-01-18 05:27:37,867 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1199 transitions. Word has length 20 [2022-01-18 05:27:37,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:37,867 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1199 transitions. [2022-01-18 05:27:37,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 05:27:37,867 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1199 transitions. [2022-01-18 05:27:37,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:37,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:37,868 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:37,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:38,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-01-18 05:27:38,084 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:38,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:38,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1704598050, now seen corresponding path program 22 times [2022-01-18 05:27:38,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:38,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753754835] [2022-01-18 05:27:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:38,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:38,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:38,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:38,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753754835] [2022-01-18 05:27:38,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753754835] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:38,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508499285] [2022-01-18 05:27:38,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:27:38,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:38,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:38,159 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:38,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:27:38,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:38,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 05:27:38,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:38,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:38,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:27:38,261 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 05:27:38,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:38,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:38,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:38,424 INFO L387 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 11 treesize of output 16 [2022-01-18 05:27:38,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:38,433 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 05:27:38,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:38,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508499285] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:38,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:38,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 05:27:38,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892074263] [2022-01-18 05:27:38,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:38,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:27:38,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:38,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:27:38,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:27:38,438 INFO L87 Difference]: Start difference. First operand 397 states and 1199 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 05:27:38,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:38,736 INFO L93 Difference]: Finished difference Result 523 states and 1556 transitions. [2022-01-18 05:27:38,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:27:38,736 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 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 20 [2022-01-18 05:27:38,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:38,737 INFO L225 Difference]: With dead ends: 523 [2022-01-18 05:27:38,737 INFO L226 Difference]: Without dead ends: 514 [2022-01-18 05:27:38,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:38,738 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 80 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:38,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 73 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 718 Invalid, 0 Unknown, 97 Unchecked, 0.2s Time] [2022-01-18 05:27:38,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-01-18 05:27:38,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 400. [2022-01-18 05:27:38,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.030075187969925) internal successors, (1209), 399 states have internal predecessors, (1209), 0 states have call successors, (0), 0 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 05:27:38,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1209 transitions. [2022-01-18 05:27:38,743 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1209 transitions. Word has length 20 [2022-01-18 05:27:38,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:38,743 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1209 transitions. [2022-01-18 05:27:38,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 05:27:38,743 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1209 transitions. [2022-01-18 05:27:38,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:38,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:38,744 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:38,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-18 05:27:38,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:38,944 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:38,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:38,945 INFO L85 PathProgramCache]: Analyzing trace with hash -636309374, now seen corresponding path program 23 times [2022-01-18 05:27:38,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:38,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639618564] [2022-01-18 05:27:38,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:38,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:39,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:39,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:39,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639618564] [2022-01-18 05:27:39,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639618564] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:39,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785394738] [2022-01-18 05:27:39,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:27:39,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:39,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:39,013 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:39,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 05:27:39,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:27:39,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:39,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:39,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:39,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:27:39,121 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 05:27:39,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:39,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:39,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:39,269 INFO L387 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 11 treesize of output 16 [2022-01-18 05:27:39,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:39,278 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 05:27:39,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:39,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785394738] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:39,282 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:39,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 05:27:39,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748455518] [2022-01-18 05:27:39,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:39,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:27:39,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:39,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:27:39,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:27:39,283 INFO L87 Difference]: Start difference. First operand 400 states and 1209 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 05:27:39,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:39,549 INFO L93 Difference]: Finished difference Result 520 states and 1552 transitions. [2022-01-18 05:27:39,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:27:39,550 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 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 20 [2022-01-18 05:27:39,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:39,550 INFO L225 Difference]: With dead ends: 520 [2022-01-18 05:27:39,551 INFO L226 Difference]: Without dead ends: 509 [2022-01-18 05:27:39,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:27:39,551 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:39,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 62 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 670 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2022-01-18 05:27:39,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-01-18 05:27:39,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 397. [2022-01-18 05:27:39,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.0277777777777777) internal successors, (1199), 396 states have internal predecessors, (1199), 0 states have call successors, (0), 0 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 05:27:39,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1199 transitions. [2022-01-18 05:27:39,556 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1199 transitions. Word has length 20 [2022-01-18 05:27:39,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:39,556 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1199 transitions. [2022-01-18 05:27:39,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 05:27:39,557 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1199 transitions. [2022-01-18 05:27:39,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:39,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:39,557 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:39,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-01-18 05:27:39,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:39,758 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:39,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:39,758 INFO L85 PathProgramCache]: Analyzing trace with hash 194016301, now seen corresponding path program 23 times [2022-01-18 05:27:39,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:39,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971184645] [2022-01-18 05:27:39,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:39,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:39,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:39,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971184645] [2022-01-18 05:27:39,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971184645] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:39,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945544235] [2022-01-18 05:27:39,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:27:39,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:39,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:39,831 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:39,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 05:27:39,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:27:39,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:39,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:39,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:39,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:27:39,947 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 05:27:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:39,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:40,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:40,081 INFO L387 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 11 treesize of output 16 [2022-01-18 05:27:40,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:40,088 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 05:27:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:40,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945544235] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:40,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:40,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 05:27:40,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333459788] [2022-01-18 05:27:40,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:40,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:27:40,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:40,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:27:40,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:27:40,093 INFO L87 Difference]: Start difference. First operand 397 states and 1199 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:40,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:40,350 INFO L93 Difference]: Finished difference Result 528 states and 1574 transitions. [2022-01-18 05:27:40,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:27:40,350 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:27:40,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:40,352 INFO L225 Difference]: With dead ends: 528 [2022-01-18 05:27:40,352 INFO L226 Difference]: Without dead ends: 517 [2022-01-18 05:27:40,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:27:40,352 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:40,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 60 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 578 Invalid, 0 Unknown, 91 Unchecked, 0.2s Time] [2022-01-18 05:27:40,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-01-18 05:27:40,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 399. [2022-01-18 05:27:40,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.0326633165829144) internal successors, (1207), 398 states have internal predecessors, (1207), 0 states have call successors, (0), 0 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 05:27:40,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1207 transitions. [2022-01-18 05:27:40,357 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1207 transitions. Word has length 20 [2022-01-18 05:27:40,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:40,358 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1207 transitions. [2022-01-18 05:27:40,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:40,358 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1207 transitions. [2022-01-18 05:27:40,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:40,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:40,358 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:40,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:40,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:40,574 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:40,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:40,574 INFO L85 PathProgramCache]: Analyzing trace with hash 118180886, now seen corresponding path program 24 times [2022-01-18 05:27:40,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:40,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157990540] [2022-01-18 05:27:40,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:40,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:40,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:40,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157990540] [2022-01-18 05:27:40,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157990540] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:40,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042045581] [2022-01-18 05:27:40,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:27:40,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:40,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:40,653 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:40,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 05:27:40,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:27:40,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:40,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:27:40,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:40,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:40,762 INFO L387 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 15 treesize of output 19 [2022-01-18 05:27:40,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:40,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:41,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:41,064 INFO L387 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 24 treesize of output 23 [2022-01-18 05:27:41,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:41,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042045581] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:41,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:41,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-01-18 05:27:41,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720203653] [2022-01-18 05:27:41,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:41,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:27:41,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:41,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:27:41,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:41,114 INFO L87 Difference]: Start difference. First operand 399 states and 1207 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:42,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:42,167 INFO L93 Difference]: Finished difference Result 602 states and 1788 transitions. [2022-01-18 05:27:42,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 05:27:42,168 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:27:42,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:42,169 INFO L225 Difference]: With dead ends: 602 [2022-01-18 05:27:42,169 INFO L226 Difference]: Without dead ends: 589 [2022-01-18 05:27:42,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=256, Invalid=1304, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 05:27:42,169 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 179 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:42,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 99 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1514 Invalid, 0 Unknown, 114 Unchecked, 0.5s Time] [2022-01-18 05:27:42,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-01-18 05:27:42,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 403. [2022-01-18 05:27:42,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.027363184079602) internal successors, (1217), 402 states have internal predecessors, (1217), 0 states have call successors, (0), 0 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 05:27:42,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1217 transitions. [2022-01-18 05:27:42,175 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1217 transitions. Word has length 20 [2022-01-18 05:27:42,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:42,175 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 1217 transitions. [2022-01-18 05:27:42,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:42,175 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1217 transitions. [2022-01-18 05:27:42,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:42,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:42,176 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:42,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-01-18 05:27:42,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:42,376 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:42,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:42,377 INFO L85 PathProgramCache]: Analyzing trace with hash 881657575, now seen corresponding path program 24 times [2022-01-18 05:27:42,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:42,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418406919] [2022-01-18 05:27:42,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:42,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:42,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:42,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418406919] [2022-01-18 05:27:42,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418406919] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:42,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386902209] [2022-01-18 05:27:42,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:27:42,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:42,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:42,454 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:42,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 05:27:42,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:27:42,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:42,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:42,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:42,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:27:42,584 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 05:27:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:42,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:42,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:42,706 INFO L387 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 11 treesize of output 16 [2022-01-18 05:27:42,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:42,713 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 05:27:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:42,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386902209] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:42,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:42,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 05:27:42,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104313716] [2022-01-18 05:27:42,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:42,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:27:42,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:42,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:27:42,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:27:42,717 INFO L87 Difference]: Start difference. First operand 403 states and 1217 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:42,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:42,944 INFO L93 Difference]: Finished difference Result 537 states and 1583 transitions. [2022-01-18 05:27:42,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:27:42,944 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:27:42,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:42,945 INFO L225 Difference]: With dead ends: 537 [2022-01-18 05:27:42,945 INFO L226 Difference]: Without dead ends: 526 [2022-01-18 05:27:42,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:27:42,945 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 87 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:42,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 47 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 494 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2022-01-18 05:27:42,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-01-18 05:27:42,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 404. [2022-01-18 05:27:42,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.0248138957816377) internal successors, (1219), 403 states have internal predecessors, (1219), 0 states have call successors, (0), 0 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 05:27:42,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1219 transitions. [2022-01-18 05:27:42,951 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1219 transitions. Word has length 20 [2022-01-18 05:27:42,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:42,951 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1219 transitions. [2022-01-18 05:27:42,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:42,951 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1219 transitions. [2022-01-18 05:27:42,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:42,952 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:42,952 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:42,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:43,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-01-18 05:27:43,168 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:43,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:43,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1555083579, now seen corresponding path program 25 times [2022-01-18 05:27:43,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:43,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362850059] [2022-01-18 05:27:43,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:43,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:43,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:43,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:43,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362850059] [2022-01-18 05:27:43,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362850059] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:43,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473375513] [2022-01-18 05:27:43,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:27:43,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:43,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:43,237 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:43,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 05:27:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:43,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:43,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:43,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:27:43,421 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 05:27:43,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:43,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:43,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:43,568 INFO L387 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 11 treesize of output 16 [2022-01-18 05:27:43,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:43,575 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 05:27:43,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:43,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473375513] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:43,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:43,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 05:27:43,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278229409] [2022-01-18 05:27:43,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:43,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:27:43,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:43,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:27:43,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:27:43,581 INFO L87 Difference]: Start difference. First operand 404 states and 1219 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:43,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:43,840 INFO L93 Difference]: Finished difference Result 553 states and 1642 transitions. [2022-01-18 05:27:43,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:27:43,840 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:27:43,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:43,841 INFO L225 Difference]: With dead ends: 553 [2022-01-18 05:27:43,841 INFO L226 Difference]: Without dead ends: 542 [2022-01-18 05:27:43,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:27:43,842 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 79 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:43,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 61 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 577 Invalid, 0 Unknown, 161 Unchecked, 0.2s Time] [2022-01-18 05:27:43,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-01-18 05:27:43,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 400. [2022-01-18 05:27:43,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.0325814536340854) internal successors, (1210), 399 states have internal predecessors, (1210), 0 states have call successors, (0), 0 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 05:27:43,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1210 transitions. [2022-01-18 05:27:43,847 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1210 transitions. Word has length 20 [2022-01-18 05:27:43,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:43,847 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1210 transitions. [2022-01-18 05:27:43,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:43,848 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1210 transitions. [2022-01-18 05:27:43,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:43,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:43,848 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:43,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-01-18 05:27:44,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-18 05:27:44,049 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:44,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:44,049 INFO L85 PathProgramCache]: Analyzing trace with hash -426527609, now seen corresponding path program 26 times [2022-01-18 05:27:44,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:44,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045894769] [2022-01-18 05:27:44,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:44,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:44,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:44,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:44,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045894769] [2022-01-18 05:27:44,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045894769] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:44,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895536933] [2022-01-18 05:27:44,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:27:44,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:44,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:44,116 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:44,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 05:27:44,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:27:44,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:44,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:44,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:44,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:27:44,217 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 05:27:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:44,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:44,358 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:44,358 INFO L387 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 11 treesize of output 16 [2022-01-18 05:27:44,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:44,365 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 05:27:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:44,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895536933] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:44,369 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:44,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 05:27:44,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422725770] [2022-01-18 05:27:44,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:44,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:27:44,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:44,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:27:44,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:27:44,369 INFO L87 Difference]: Start difference. First operand 400 states and 1210 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:44,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:44,748 INFO L93 Difference]: Finished difference Result 616 states and 1815 transitions. [2022-01-18 05:27:44,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:27:44,749 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:27:44,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:44,749 INFO L225 Difference]: With dead ends: 616 [2022-01-18 05:27:44,749 INFO L226 Difference]: Without dead ends: 605 [2022-01-18 05:27:44,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:27:44,750 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 96 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:44,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 105 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 872 Invalid, 0 Unknown, 183 Unchecked, 0.3s Time] [2022-01-18 05:27:44,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-01-18 05:27:44,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 408. [2022-01-18 05:27:44,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.022113022113022) internal successors, (1230), 407 states have internal predecessors, (1230), 0 states have call successors, (0), 0 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 05:27:44,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1230 transitions. [2022-01-18 05:27:44,755 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1230 transitions. Word has length 20 [2022-01-18 05:27:44,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:44,756 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1230 transitions. [2022-01-18 05:27:44,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:44,756 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1230 transitions. [2022-01-18 05:27:44,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:27:44,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:44,756 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:44,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:44,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:44,957 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:44,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:44,957 INFO L85 PathProgramCache]: Analyzing trace with hash -493705572, now seen corresponding path program 25 times [2022-01-18 05:27:44,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:44,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856439656] [2022-01-18 05:27:44,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:44,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:45,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:45,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856439656] [2022-01-18 05:27:45,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856439656] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:45,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440374221] [2022-01-18 05:27:45,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:27:45,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:45,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:45,018 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:45,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 05:27:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:45,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 05:27:45,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:45,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:27:45,145 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 05:27:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:45,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:45,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:27:45,285 INFO L387 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 11 treesize of output 16 [2022-01-18 05:27:45,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:27:45,292 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 05:27:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:45,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440374221] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:45,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:45,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 05:27:45,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439431724] [2022-01-18 05:27:45,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:45,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:27:45,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:45,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:27:45,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:27:45,297 INFO L87 Difference]: Start difference. First operand 408 states and 1230 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:45,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:45,664 INFO L93 Difference]: Finished difference Result 607 states and 1791 transitions. [2022-01-18 05:27:45,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:27:45,664 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 05:27:45,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:45,665 INFO L225 Difference]: With dead ends: 607 [2022-01-18 05:27:45,665 INFO L226 Difference]: Without dead ends: 596 [2022-01-18 05:27:45,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:27:45,666 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 133 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:45,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 96 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 764 Invalid, 0 Unknown, 277 Unchecked, 0.3s Time] [2022-01-18 05:27:45,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-01-18 05:27:45,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 402. [2022-01-18 05:27:45,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.027431421446384) internal successors, (1214), 401 states have internal predecessors, (1214), 0 states have call successors, (0), 0 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 05:27:45,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1214 transitions. [2022-01-18 05:27:45,672 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1214 transitions. Word has length 20 [2022-01-18 05:27:45,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:45,672 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1214 transitions. [2022-01-18 05:27:45,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:45,672 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1214 transitions. [2022-01-18 05:27:45,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:45,672 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:45,673 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 05:27:45,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:45,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:45,873 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:45,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:45,873 INFO L85 PathProgramCache]: Analyzing trace with hash 940655469, now seen corresponding path program 27 times [2022-01-18 05:27:45,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:45,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97811770] [2022-01-18 05:27:45,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:45,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:45,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:45,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:45,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97811770] [2022-01-18 05:27:45,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97811770] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:45,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033538719] [2022-01-18 05:27:45,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:27:45,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:45,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:45,899 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:45,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 05:27:45,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:27:45,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:45,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:45,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:45,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:45,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:46,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033538719] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:46,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:46,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-01-18 05:27:46,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577935627] [2022-01-18 05:27:46,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:46,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 05:27:46,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:46,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 05:27:46,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-18 05:27:46,015 INFO L87 Difference]: Start difference. First operand 402 states and 1214 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:46,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:46,109 INFO L93 Difference]: Finished difference Result 599 states and 1760 transitions. [2022-01-18 05:27:46,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 05:27:46,110 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:27:46,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:46,111 INFO L225 Difference]: With dead ends: 599 [2022-01-18 05:27:46,111 INFO L226 Difference]: Without dead ends: 599 [2022-01-18 05:27:46,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-01-18 05:27:46,111 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 80 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:46,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 59 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:27:46,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-18 05:27:46,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 335. [2022-01-18 05:27:46,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.086826347305389) internal successors, (1031), 334 states have internal predecessors, (1031), 0 states have call successors, (0), 0 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 05:27:46,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1031 transitions. [2022-01-18 05:27:46,116 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1031 transitions. Word has length 22 [2022-01-18 05:27:46,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:46,116 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 1031 transitions. [2022-01-18 05:27:46,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:46,117 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1031 transitions. [2022-01-18 05:27:46,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:46,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:46,117 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 05:27:46,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:46,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:46,318 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:46,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:46,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1281362867, now seen corresponding path program 28 times [2022-01-18 05:27:46,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:46,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724523549] [2022-01-18 05:27:46,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:46,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:46,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:46,339 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 05:27:46,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:46,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724523549] [2022-01-18 05:27:46,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724523549] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:46,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239516239] [2022-01-18 05:27:46,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:27:46,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:46,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:46,340 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:46,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 05:27:46,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:27:46,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:46,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:46,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:46,404 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 05:27:46,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:46,435 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 05:27:46,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239516239] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:46,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:46,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-01-18 05:27:46,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118139718] [2022-01-18 05:27:46,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:46,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 05:27:46,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:46,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 05:27:46,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-18 05:27:46,436 INFO L87 Difference]: Start difference. First operand 335 states and 1031 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:46,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:46,556 INFO L93 Difference]: Finished difference Result 500 states and 1455 transitions. [2022-01-18 05:27:46,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:27:46,556 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:27:46,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:46,557 INFO L225 Difference]: With dead ends: 500 [2022-01-18 05:27:46,557 INFO L226 Difference]: Without dead ends: 441 [2022-01-18 05:27:46,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:27:46,557 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 99 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:46,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 80 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:27:46,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-01-18 05:27:46,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 335. [2022-01-18 05:27:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.05688622754491) internal successors, (1021), 334 states have internal predecessors, (1021), 0 states have call successors, (0), 0 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 05:27:46,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1021 transitions. [2022-01-18 05:27:46,562 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1021 transitions. Word has length 22 [2022-01-18 05:27:46,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:46,562 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 1021 transitions. [2022-01-18 05:27:46,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:46,562 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1021 transitions. [2022-01-18 05:27:46,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:46,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:46,562 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 05:27:46,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-01-18 05:27:46,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:46,763 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:46,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:46,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1556134201, now seen corresponding path program 29 times [2022-01-18 05:27:46,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:46,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451743861] [2022-01-18 05:27:46,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:46,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:46,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:46,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:46,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451743861] [2022-01-18 05:27:46,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451743861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:46,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924255941] [2022-01-18 05:27:46,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:27:46,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:46,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:46,786 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:46,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 05:27:46,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:27:46,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:46,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:46,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:46,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:46,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:46,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924255941] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:46,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:46,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 05:27:46,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052909638] [2022-01-18 05:27:46,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:46,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 05:27:46,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:46,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 05:27:46,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:27:46,896 INFO L87 Difference]: Start difference. First operand 335 states and 1021 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:47,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:47,019 INFO L93 Difference]: Finished difference Result 661 states and 1944 transitions. [2022-01-18 05:27:47,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:27:47,020 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:27:47,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:47,021 INFO L225 Difference]: With dead ends: 661 [2022-01-18 05:27:47,021 INFO L226 Difference]: Without dead ends: 661 [2022-01-18 05:27:47,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:27:47,021 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 153 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:47,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 68 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:27:47,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-01-18 05:27:47,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 389. [2022-01-18 05:27:47,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.1211340206185567) internal successors, (1211), 388 states have internal predecessors, (1211), 0 states have call successors, (0), 0 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 05:27:47,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1211 transitions. [2022-01-18 05:27:47,026 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1211 transitions. Word has length 22 [2022-01-18 05:27:47,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:47,027 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1211 transitions. [2022-01-18 05:27:47,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:47,027 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1211 transitions. [2022-01-18 05:27:47,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:47,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:47,027 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 05:27:47,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:47,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-01-18 05:27:47,228 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:47,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:47,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1860149017, now seen corresponding path program 30 times [2022-01-18 05:27:47,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:47,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780823170] [2022-01-18 05:27:47,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:47,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:47,249 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 05:27:47,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:47,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780823170] [2022-01-18 05:27:47,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780823170] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:47,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417956871] [2022-01-18 05:27:47,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:27:47,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:47,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:47,251 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:47,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 05:27:47,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:27:47,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:47,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:47,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:47,328 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 05:27:47,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:47,358 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 05:27:47,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417956871] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:47,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:47,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 05:27:47,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184418367] [2022-01-18 05:27:47,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:47,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 05:27:47,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:47,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 05:27:47,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:27:47,359 INFO L87 Difference]: Start difference. First operand 389 states and 1211 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:47,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:47,574 INFO L93 Difference]: Finished difference Result 721 states and 2031 transitions. [2022-01-18 05:27:47,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:27:47,574 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:27:47,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:47,575 INFO L225 Difference]: With dead ends: 721 [2022-01-18 05:27:47,575 INFO L226 Difference]: Without dead ends: 685 [2022-01-18 05:27:47,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:47,576 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 173 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:47,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 112 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:27:47,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-01-18 05:27:47,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 493. [2022-01-18 05:27:47,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.0792682926829267) internal successors, (1515), 492 states have internal predecessors, (1515), 0 states have call successors, (0), 0 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 05:27:47,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1515 transitions. [2022-01-18 05:27:47,582 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1515 transitions. Word has length 22 [2022-01-18 05:27:47,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:47,582 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 1515 transitions. [2022-01-18 05:27:47,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:47,582 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1515 transitions. [2022-01-18 05:27:47,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:47,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:47,583 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 05:27:47,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:47,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:47,784 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:47,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:47,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1623645695, now seen corresponding path program 31 times [2022-01-18 05:27:47,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:47,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544044491] [2022-01-18 05:27:47,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:47,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:47,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:47,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544044491] [2022-01-18 05:27:47,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544044491] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:47,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395530562] [2022-01-18 05:27:47,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:27:47,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:47,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:47,822 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:47,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 05:27:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:47,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:47,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:47,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:47,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:47,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:47,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395530562] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:47,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:47,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 05:27:47,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925142233] [2022-01-18 05:27:47,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:47,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 05:27:47,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:47,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 05:27:47,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:27:47,933 INFO L87 Difference]: Start difference. First operand 493 states and 1515 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:48,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:48,082 INFO L93 Difference]: Finished difference Result 955 states and 2765 transitions. [2022-01-18 05:27:48,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:27:48,082 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:27:48,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:48,084 INFO L225 Difference]: With dead ends: 955 [2022-01-18 05:27:48,084 INFO L226 Difference]: Without dead ends: 955 [2022-01-18 05:27:48,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:27:48,084 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 140 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:48,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 90 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:27:48,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-01-18 05:27:48,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 537. [2022-01-18 05:27:48,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 3.173507462686567) internal successors, (1701), 536 states have internal predecessors, (1701), 0 states have call successors, (0), 0 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 05:27:48,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1701 transitions. [2022-01-18 05:27:48,091 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1701 transitions. Word has length 22 [2022-01-18 05:27:48,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:48,092 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 1701 transitions. [2022-01-18 05:27:48,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:48,092 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1701 transitions. [2022-01-18 05:27:48,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:48,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:48,093 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 05:27:48,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-01-18 05:27:48,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-01-18 05:27:48,293 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:48,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:48,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1746864421, now seen corresponding path program 32 times [2022-01-18 05:27:48,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:48,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289778224] [2022-01-18 05:27:48,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:48,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:48,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:48,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289778224] [2022-01-18 05:27:48,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289778224] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:48,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541590975] [2022-01-18 05:27:48,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:27:48,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:48,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:48,314 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:48,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 05:27:48,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:27:48,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:48,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:48,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:48,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:48,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:48,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541590975] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:48,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:48,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 05:27:48,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213822350] [2022-01-18 05:27:48,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:48,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 05:27:48,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:48,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 05:27:48,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:27:48,438 INFO L87 Difference]: Start difference. First operand 537 states and 1701 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:48,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:48,659 INFO L93 Difference]: Finished difference Result 855 states and 2523 transitions. [2022-01-18 05:27:48,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 05:27:48,659 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:27:48,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:48,661 INFO L225 Difference]: With dead ends: 855 [2022-01-18 05:27:48,661 INFO L226 Difference]: Without dead ends: 831 [2022-01-18 05:27:48,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:48,661 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 158 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:48,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 117 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:27:48,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-01-18 05:27:48,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 569. [2022-01-18 05:27:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 3.214788732394366) internal successors, (1826), 568 states have internal predecessors, (1826), 0 states have call successors, (0), 0 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 05:27:48,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1826 transitions. [2022-01-18 05:27:48,669 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1826 transitions. Word has length 22 [2022-01-18 05:27:48,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:48,669 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 1826 transitions. [2022-01-18 05:27:48,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:48,669 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1826 transitions. [2022-01-18 05:27:48,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:48,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:48,670 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 05:27:48,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:48,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-01-18 05:27:48,871 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:48,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:48,871 INFO L85 PathProgramCache]: Analyzing trace with hash 676108133, now seen corresponding path program 33 times [2022-01-18 05:27:48,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:48,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771355138] [2022-01-18 05:27:48,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:48,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:48,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:48,891 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 05:27:48,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:48,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771355138] [2022-01-18 05:27:48,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771355138] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:48,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934959617] [2022-01-18 05:27:48,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:27:48,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:48,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:48,893 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:48,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 05:27:48,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:27:48,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:48,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:48,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:48,960 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 05:27:48,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:48,988 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 05:27:48,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934959617] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:48,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:48,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 05:27:48,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341426552] [2022-01-18 05:27:48,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:48,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 05:27:48,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:48,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 05:27:48,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:27:48,989 INFO L87 Difference]: Start difference. First operand 569 states and 1826 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:49,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:49,121 INFO L93 Difference]: Finished difference Result 818 states and 2433 transitions. [2022-01-18 05:27:49,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:27:49,121 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:27:49,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:49,123 INFO L225 Difference]: With dead ends: 818 [2022-01-18 05:27:49,123 INFO L226 Difference]: Without dead ends: 797 [2022-01-18 05:27:49,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:27:49,123 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 122 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:49,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 97 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:27:49,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-01-18 05:27:49,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 538. [2022-01-18 05:27:49,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 3.2309124767225326) internal successors, (1735), 537 states have internal predecessors, (1735), 0 states have call successors, (0), 0 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 05:27:49,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1735 transitions. [2022-01-18 05:27:49,130 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1735 transitions. Word has length 22 [2022-01-18 05:27:49,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:49,130 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 1735 transitions. [2022-01-18 05:27:49,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:49,130 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1735 transitions. [2022-01-18 05:27:49,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:49,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:49,131 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 05:27:49,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-18 05:27:49,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-01-18 05:27:49,332 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:49,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:49,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1388287935, now seen corresponding path program 34 times [2022-01-18 05:27:49,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:49,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135213891] [2022-01-18 05:27:49,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:49,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:49,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:49,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135213891] [2022-01-18 05:27:49,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135213891] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:49,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942666939] [2022-01-18 05:27:49,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:27:49,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:49,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:49,364 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:49,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 05:27:49,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:27:49,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:49,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:49,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:49,425 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 05:27:49,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:49,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942666939] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:49,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:49,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 05:27:49,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353686400] [2022-01-18 05:27:49,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:49,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 05:27:49,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:49,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 05:27:49,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:27:49,450 INFO L87 Difference]: Start difference. First operand 538 states and 1735 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:49,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:49,637 INFO L93 Difference]: Finished difference Result 813 states and 2443 transitions. [2022-01-18 05:27:49,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:27:49,637 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:27:49,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:49,638 INFO L225 Difference]: With dead ends: 813 [2022-01-18 05:27:49,639 INFO L226 Difference]: Without dead ends: 803 [2022-01-18 05:27:49,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:27:49,639 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 132 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:49,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 115 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:27:49,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-01-18 05:27:49,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 544. [2022-01-18 05:27:49,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 3.2081031307550645) internal successors, (1742), 543 states have internal predecessors, (1742), 0 states have call successors, (0), 0 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 05:27:49,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1742 transitions. [2022-01-18 05:27:49,646 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1742 transitions. Word has length 22 [2022-01-18 05:27:49,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:49,646 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 1742 transitions. [2022-01-18 05:27:49,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:49,646 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1742 transitions. [2022-01-18 05:27:49,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:49,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:49,647 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 05:27:49,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:49,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-01-18 05:27:49,848 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:49,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:49,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1312956920, now seen corresponding path program 3 times [2022-01-18 05:27:49,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:49,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254295626] [2022-01-18 05:27:49,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:49,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:49,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:49,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254295626] [2022-01-18 05:27:49,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254295626] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:49,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938462643] [2022-01-18 05:27:49,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:27:49,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:49,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:49,870 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:49,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 05:27:49,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:27:49,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:49,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:49,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:49,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:49,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:49,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938462643] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:49,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:49,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 05:27:49,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453225912] [2022-01-18 05:27:49,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:49,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 05:27:49,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:49,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 05:27:49,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-01-18 05:27:49,990 INFO L87 Difference]: Start difference. First operand 544 states and 1742 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 05:27:50,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:50,167 INFO L93 Difference]: Finished difference Result 1170 states and 3502 transitions. [2022-01-18 05:27:50,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:27:50,168 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 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 05:27:50,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:50,169 INFO L225 Difference]: With dead ends: 1170 [2022-01-18 05:27:50,169 INFO L226 Difference]: Without dead ends: 1170 [2022-01-18 05:27:50,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:50,169 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 163 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:50,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 120 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:27:50,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2022-01-18 05:27:50,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 535. [2022-01-18 05:27:50,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 3.254681647940075) internal successors, (1738), 534 states have internal predecessors, (1738), 0 states have call successors, (0), 0 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 05:27:50,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 1738 transitions. [2022-01-18 05:27:50,178 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 1738 transitions. Word has length 22 [2022-01-18 05:27:50,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:50,178 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 1738 transitions. [2022-01-18 05:27:50,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 05:27:50,178 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 1738 transitions. [2022-01-18 05:27:50,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:50,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:50,179 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 05:27:50,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-01-18 05:27:50,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:50,379 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:50,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:50,379 INFO L85 PathProgramCache]: Analyzing trace with hash 660903613, now seen corresponding path program 35 times [2022-01-18 05:27:50,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:50,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100397403] [2022-01-18 05:27:50,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:50,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:50,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:50,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:50,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100397403] [2022-01-18 05:27:50,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100397403] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:50,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583185980] [2022-01-18 05:27:50,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:27:50,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:50,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:50,400 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:50,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 05:27:50,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 05:27:50,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:50,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:50,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:50,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:50,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:50,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583185980] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:50,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:50,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 05:27:50,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683030847] [2022-01-18 05:27:50,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:50,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 05:27:50,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:50,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 05:27:50,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:27:50,538 INFO L87 Difference]: Start difference. First operand 535 states and 1738 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 05:27:50,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:50,711 INFO L93 Difference]: Finished difference Result 1254 states and 3793 transitions. [2022-01-18 05:27:50,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:27:50,712 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 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 05:27:50,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:50,713 INFO L225 Difference]: With dead ends: 1254 [2022-01-18 05:27:50,714 INFO L226 Difference]: Without dead ends: 1254 [2022-01-18 05:27:50,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:27:50,714 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 135 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:50,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 114 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:27:50,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2022-01-18 05:27:50,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 651. [2022-01-18 05:27:50,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 3.3784615384615386) internal successors, (2196), 650 states have internal predecessors, (2196), 0 states have call successors, (0), 0 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 05:27:50,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 2196 transitions. [2022-01-18 05:27:50,724 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 2196 transitions. Word has length 22 [2022-01-18 05:27:50,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:50,724 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 2196 transitions. [2022-01-18 05:27:50,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 05:27:50,724 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 2196 transitions. [2022-01-18 05:27:50,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:50,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:50,725 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 05:27:50,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:50,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:50,926 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:50,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:50,926 INFO L85 PathProgramCache]: Analyzing trace with hash 896261373, now seen corresponding path program 36 times [2022-01-18 05:27:50,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:50,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34919496] [2022-01-18 05:27:50,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:50,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:50,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:50,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:27:50,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:50,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34919496] [2022-01-18 05:27:50,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34919496] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:50,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861916688] [2022-01-18 05:27:50,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:27:50,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:50,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:50,945 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:50,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 05:27:50,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:27:50,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:50,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:50,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:51,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:27:51,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861916688] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:51,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:51,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 05:27:51,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936798580] [2022-01-18 05:27:51,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:51,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 05:27:51,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:51,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 05:27:51,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:27:51,047 INFO L87 Difference]: Start difference. First operand 651 states and 2196 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:51,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:51,243 INFO L93 Difference]: Finished difference Result 1121 states and 3415 transitions. [2022-01-18 05:27:51,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 05:27:51,244 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:27:51,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:51,245 INFO L225 Difference]: With dead ends: 1121 [2022-01-18 05:27:51,245 INFO L226 Difference]: Without dead ends: 1116 [2022-01-18 05:27:51,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:27:51,246 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 167 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:51,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 110 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:27:51,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-01-18 05:27:51,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 651. [2022-01-18 05:27:51,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 3.370769230769231) internal successors, (2191), 650 states have internal predecessors, (2191), 0 states have call successors, (0), 0 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 05:27:51,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 2191 transitions. [2022-01-18 05:27:51,255 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 2191 transitions. Word has length 22 [2022-01-18 05:27:51,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:51,256 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 2191 transitions. [2022-01-18 05:27:51,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:51,256 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 2191 transitions. [2022-01-18 05:27:51,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:51,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:51,257 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 05:27:51,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-01-18 05:27:51,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:51,457 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:51,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:51,457 INFO L85 PathProgramCache]: Analyzing trace with hash 412104765, now seen corresponding path program 37 times [2022-01-18 05:27:51,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:51,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012494081] [2022-01-18 05:27:51,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:51,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:51,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:51,478 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 05:27:51,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:51,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012494081] [2022-01-18 05:27:51,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012494081] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:51,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810205837] [2022-01-18 05:27:51,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:27:51,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:51,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:51,479 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:51,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 05:27:51,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:51,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:51,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:51,554 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 05:27:51,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:51,583 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 05:27:51,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810205837] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:51,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:51,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 05:27:51,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484426301] [2022-01-18 05:27:51,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:51,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 05:27:51,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:51,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 05:27:51,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-01-18 05:27:51,584 INFO L87 Difference]: Start difference. First operand 651 states and 2191 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:51,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:51,757 INFO L93 Difference]: Finished difference Result 1135 states and 3572 transitions. [2022-01-18 05:27:51,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:27:51,757 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:27:51,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:51,758 INFO L225 Difference]: With dead ends: 1135 [2022-01-18 05:27:51,758 INFO L226 Difference]: Without dead ends: 1127 [2022-01-18 05:27:51,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:27:51,759 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 167 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:51,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 92 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:27:51,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-01-18 05:27:51,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 732. [2022-01-18 05:27:51,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 3.4254445964432283) internal successors, (2504), 731 states have internal predecessors, (2504), 0 states have call successors, (0), 0 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 05:27:51,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2504 transitions. [2022-01-18 05:27:51,769 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2504 transitions. Word has length 22 [2022-01-18 05:27:51,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:51,769 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 2504 transitions. [2022-01-18 05:27:51,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:51,769 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2504 transitions. [2022-01-18 05:27:51,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:51,770 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:51,770 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 05:27:51,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:51,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-01-18 05:27:51,971 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:51,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:51,971 INFO L85 PathProgramCache]: Analyzing trace with hash -235488933, now seen corresponding path program 38 times [2022-01-18 05:27:51,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:51,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890134980] [2022-01-18 05:27:51,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:51,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:51,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:51,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:51,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890134980] [2022-01-18 05:27:51,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890134980] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:51,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768761044] [2022-01-18 05:27:51,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:27:51,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:51,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:51,998 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:52,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 05:27:52,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:27:52,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:52,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:52,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:52,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:52,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768761044] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:52,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:52,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 05:27:52,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289390660] [2022-01-18 05:27:52,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:52,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 05:27:52,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:52,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 05:27:52,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-18 05:27:52,123 INFO L87 Difference]: Start difference. First operand 732 states and 2504 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 05:27:52,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:52,335 INFO L93 Difference]: Finished difference Result 1172 states and 3674 transitions. [2022-01-18 05:27:52,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:27:52,336 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 05:27:52,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:52,338 INFO L225 Difference]: With dead ends: 1172 [2022-01-18 05:27:52,341 INFO L226 Difference]: Without dead ends: 1172 [2022-01-18 05:27:52,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:27:52,342 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 152 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:52,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 200 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:27:52,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2022-01-18 05:27:52,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 754. [2022-01-18 05:27:52,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.4648074369189907) internal successors, (2609), 753 states have internal predecessors, (2609), 0 states have call successors, (0), 0 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 05:27:52,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2609 transitions. [2022-01-18 05:27:52,356 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2609 transitions. Word has length 22 [2022-01-18 05:27:52,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:52,356 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 2609 transitions. [2022-01-18 05:27:52,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 05:27:52,356 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2609 transitions. [2022-01-18 05:27:52,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:52,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:52,357 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 05:27:52,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:52,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:52,557 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:52,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:52,558 INFO L85 PathProgramCache]: Analyzing trace with hash 824275693, now seen corresponding path program 39 times [2022-01-18 05:27:52,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:52,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18432772] [2022-01-18 05:27:52,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:52,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:52,581 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 05:27:52,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:52,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18432772] [2022-01-18 05:27:52,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18432772] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:52,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144344331] [2022-01-18 05:27:52,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:27:52,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:52,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:52,582 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:52,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 05:27:52,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:27:52,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:52,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:52,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:52,669 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 05:27:52,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:52,698 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 05:27:52,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144344331] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:52,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:52,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 05:27:52,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758783292] [2022-01-18 05:27:52,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:52,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 05:27:52,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:52,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 05:27:52,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-01-18 05:27:52,706 INFO L87 Difference]: Start difference. First operand 754 states and 2609 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 05:27:52,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:52,924 INFO L93 Difference]: Finished difference Result 1178 states and 3692 transitions. [2022-01-18 05:27:52,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 05:27:52,925 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 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 05:27:52,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:52,926 INFO L225 Difference]: With dead ends: 1178 [2022-01-18 05:27:52,926 INFO L226 Difference]: Without dead ends: 1118 [2022-01-18 05:27:52,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:27:52,927 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 219 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:52,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 127 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:27:52,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-01-18 05:27:52,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 855. [2022-01-18 05:27:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 3.4531615925058547) internal successors, (2949), 854 states have internal predecessors, (2949), 0 states have call successors, (0), 0 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 05:27:52,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2949 transitions. [2022-01-18 05:27:52,939 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2949 transitions. Word has length 22 [2022-01-18 05:27:52,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:52,939 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 2949 transitions. [2022-01-18 05:27:52,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 05:27:52,940 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2949 transitions. [2022-01-18 05:27:52,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:52,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:52,941 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 05:27:52,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-01-18 05:27:53,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:53,156 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:53,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:53,157 INFO L85 PathProgramCache]: Analyzing trace with hash 673068563, now seen corresponding path program 40 times [2022-01-18 05:27:53,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:53,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704015642] [2022-01-18 05:27:53,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:53,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:53,174 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 05:27:53,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:53,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704015642] [2022-01-18 05:27:53,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704015642] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:53,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189637477] [2022-01-18 05:27:53,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:27:53,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:53,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:53,176 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:53,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 05:27:53,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:27:53,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:53,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:53,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:53,258 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 05:27:53,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:53,286 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 05:27:53,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189637477] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:53,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:53,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 05:27:53,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052081079] [2022-01-18 05:27:53,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:53,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 05:27:53,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:53,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 05:27:53,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:27:53,287 INFO L87 Difference]: Start difference. First operand 855 states and 2949 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:53,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:53,449 INFO L93 Difference]: Finished difference Result 1384 states and 4343 transitions. [2022-01-18 05:27:53,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:27:53,449 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:27:53,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:53,452 INFO L225 Difference]: With dead ends: 1384 [2022-01-18 05:27:53,452 INFO L226 Difference]: Without dead ends: 1342 [2022-01-18 05:27:53,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:27:53,452 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 177 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:53,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 131 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:27:53,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2022-01-18 05:27:53,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1001. [2022-01-18 05:27:53,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 1000 states have (on average 3.436) internal successors, (3436), 1000 states have internal predecessors, (3436), 0 states have call successors, (0), 0 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 05:27:53,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 3436 transitions. [2022-01-18 05:27:53,469 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 3436 transitions. Word has length 22 [2022-01-18 05:27:53,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:53,469 INFO L470 AbstractCegarLoop]: Abstraction has 1001 states and 3436 transitions. [2022-01-18 05:27:53,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:53,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 3436 transitions. [2022-01-18 05:27:53,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:53,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:53,470 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 05:27:53,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-01-18 05:27:53,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-01-18 05:27:53,686 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:53,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:53,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1391327505, now seen corresponding path program 41 times [2022-01-18 05:27:53,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:53,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010609426] [2022-01-18 05:27:53,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:53,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:53,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:53,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:53,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010609426] [2022-01-18 05:27:53,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010609426] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:53,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055125196] [2022-01-18 05:27:53,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:27:53,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:53,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:53,705 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:53,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 05:27:53,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 05:27:53,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:53,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:53,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:53,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:53,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:53,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055125196] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:53,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:53,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 05:27:53,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71021283] [2022-01-18 05:27:53,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:53,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 05:27:53,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:53,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 05:27:53,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:27:53,810 INFO L87 Difference]: Start difference. First operand 1001 states and 3436 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:54,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:54,001 INFO L93 Difference]: Finished difference Result 1359 states and 4366 transitions. [2022-01-18 05:27:54,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:27:54,002 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:27:54,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:54,004 INFO L225 Difference]: With dead ends: 1359 [2022-01-18 05:27:54,004 INFO L226 Difference]: Without dead ends: 1354 [2022-01-18 05:27:54,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:27:54,005 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 118 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:54,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 174 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:27:54,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2022-01-18 05:27:54,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 953. [2022-01-18 05:27:54,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 3.4044117647058822) internal successors, (3241), 952 states have internal predecessors, (3241), 0 states have call successors, (0), 0 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 05:27:54,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 3241 transitions. [2022-01-18 05:27:54,018 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 3241 transitions. Word has length 22 [2022-01-18 05:27:54,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:54,018 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 3241 transitions. [2022-01-18 05:27:54,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:54,018 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 3241 transitions. [2022-01-18 05:27:54,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:54,020 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:54,020 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 05:27:54,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:54,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-01-18 05:27:54,220 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:54,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:54,221 INFO L85 PathProgramCache]: Analyzing trace with hash -28111141, now seen corresponding path program 42 times [2022-01-18 05:27:54,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:54,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381942396] [2022-01-18 05:27:54,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:54,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:54,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:54,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381942396] [2022-01-18 05:27:54,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381942396] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:54,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287684414] [2022-01-18 05:27:54,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:27:54,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:54,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:54,257 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:54,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 05:27:54,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 05:27:54,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:54,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:54,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:54,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:54,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287684414] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:54,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:54,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 05:27:54,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858414609] [2022-01-18 05:27:54,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:54,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 05:27:54,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:54,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 05:27:54,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:27:54,378 INFO L87 Difference]: Start difference. First operand 953 states and 3241 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 05:27:54,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:54,538 INFO L93 Difference]: Finished difference Result 1661 states and 5281 transitions. [2022-01-18 05:27:54,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:27:54,538 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 05:27:54,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:54,541 INFO L225 Difference]: With dead ends: 1661 [2022-01-18 05:27:54,541 INFO L226 Difference]: Without dead ends: 1661 [2022-01-18 05:27:54,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:27:54,541 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 128 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:54,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 120 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:27:54,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2022-01-18 05:27:54,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1070. [2022-01-18 05:27:54,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1069 states have (on average 3.4752104770813843) internal successors, (3715), 1069 states have internal predecessors, (3715), 0 states have call successors, (0), 0 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 05:27:54,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 3715 transitions. [2022-01-18 05:27:54,558 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 3715 transitions. Word has length 22 [2022-01-18 05:27:54,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:54,559 INFO L470 AbstractCegarLoop]: Abstraction has 1070 states and 3715 transitions. [2022-01-18 05:27:54,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 05:27:54,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 3715 transitions. [2022-01-18 05:27:54,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:54,560 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:54,561 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 05:27:54,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-01-18 05:27:54,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:54,774 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:54,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:54,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1520137261, now seen corresponding path program 43 times [2022-01-18 05:27:54,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:54,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144383303] [2022-01-18 05:27:54,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:54,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:54,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:54,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144383303] [2022-01-18 05:27:54,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144383303] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:54,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152171383] [2022-01-18 05:27:54,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:27:54,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:54,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:54,799 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:54,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 05:27:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:54,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:54,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:54,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:54,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152171383] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:54,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:54,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 05:27:54,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609729052] [2022-01-18 05:27:54,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:54,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 05:27:54,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:54,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 05:27:54,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:27:54,922 INFO L87 Difference]: Start difference. First operand 1070 states and 3715 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 05:27:55,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:55,116 INFO L93 Difference]: Finished difference Result 1318 states and 4372 transitions. [2022-01-18 05:27:55,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:27:55,117 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 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 05:27:55,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:55,119 INFO L225 Difference]: With dead ends: 1318 [2022-01-18 05:27:55,119 INFO L226 Difference]: Without dead ends: 1294 [2022-01-18 05:27:55,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:27:55,119 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 124 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:55,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 136 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:27:55,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2022-01-18 05:27:55,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1112. [2022-01-18 05:27:55,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.532853285328533) internal successors, (3925), 1111 states have internal predecessors, (3925), 0 states have call successors, (0), 0 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 05:27:55,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3925 transitions. [2022-01-18 05:27:55,137 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3925 transitions. Word has length 22 [2022-01-18 05:27:55,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:55,137 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 3925 transitions. [2022-01-18 05:27:55,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 05:27:55,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3925 transitions. [2022-01-18 05:27:55,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:55,139 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:55,139 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 05:27:55,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:55,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:55,354 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:55,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:55,354 INFO L85 PathProgramCache]: Analyzing trace with hash -360322321, now seen corresponding path program 44 times [2022-01-18 05:27:55,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:55,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63446610] [2022-01-18 05:27:55,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:55,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:55,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:27:55,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:55,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63446610] [2022-01-18 05:27:55,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63446610] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:55,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273867332] [2022-01-18 05:27:55,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:27:55,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:55,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:55,373 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:55,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 05:27:55,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:27:55,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:55,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:55,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:55,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:55,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:27:55,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273867332] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:55,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:55,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 05:27:55,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670201356] [2022-01-18 05:27:55,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:55,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 05:27:55,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:55,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 05:27:55,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:27:55,476 INFO L87 Difference]: Start difference. First operand 1112 states and 3925 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:55,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:55,640 INFO L93 Difference]: Finished difference Result 1655 states and 5369 transitions. [2022-01-18 05:27:55,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:27:55,640 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:27:55,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:55,642 INFO L225 Difference]: With dead ends: 1655 [2022-01-18 05:27:55,642 INFO L226 Difference]: Without dead ends: 1650 [2022-01-18 05:27:55,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:27:55,643 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 154 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:55,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 123 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:27:55,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2022-01-18 05:27:55,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1058. [2022-01-18 05:27:55,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 3.501419110690634) internal successors, (3701), 1057 states have internal predecessors, (3701), 0 states have call successors, (0), 0 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 05:27:55,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 3701 transitions. [2022-01-18 05:27:55,659 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 3701 transitions. Word has length 22 [2022-01-18 05:27:55,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:55,659 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 3701 transitions. [2022-01-18 05:27:55,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:55,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 3701 transitions. [2022-01-18 05:27:55,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:55,661 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:55,661 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 05:27:55,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:55,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:55,861 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:55,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:55,861 INFO L85 PathProgramCache]: Analyzing trace with hash -844478929, now seen corresponding path program 45 times [2022-01-18 05:27:55,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:55,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237643296] [2022-01-18 05:27:55,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:55,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:55,882 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 05:27:55,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:55,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237643296] [2022-01-18 05:27:55,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237643296] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:55,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536823978] [2022-01-18 05:27:55,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:27:55,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:55,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:55,883 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:55,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 05:27:55,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:27:55,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:55,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:55,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:55,962 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 05:27:55,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:55,990 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 05:27:55,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536823978] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:55,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:55,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 05:27:55,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762346684] [2022-01-18 05:27:55,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:55,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 05:27:55,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:55,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 05:27:55,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-01-18 05:27:55,991 INFO L87 Difference]: Start difference. First operand 1058 states and 3701 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:56,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:56,178 INFO L93 Difference]: Finished difference Result 1629 states and 5300 transitions. [2022-01-18 05:27:56,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 05:27:56,178 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:27:56,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:56,181 INFO L225 Difference]: With dead ends: 1629 [2022-01-18 05:27:56,181 INFO L226 Difference]: Without dead ends: 1621 [2022-01-18 05:27:56,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:27:56,181 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 143 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:56,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 137 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:27:56,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2022-01-18 05:27:56,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1058. [2022-01-18 05:27:56,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 3.498580889309366) internal successors, (3698), 1057 states have internal predecessors, (3698), 0 states have call successors, (0), 0 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 05:27:56,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 3698 transitions. [2022-01-18 05:27:56,198 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 3698 transitions. Word has length 22 [2022-01-18 05:27:56,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:56,198 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 3698 transitions. [2022-01-18 05:27:56,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:56,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 3698 transitions. [2022-01-18 05:27:56,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:56,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:56,199 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:27:56,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:56,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:56,415 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:56,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:56,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1228711595, now seen corresponding path program 46 times [2022-01-18 05:27:56,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:56,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95313219] [2022-01-18 05:27:56,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:56,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:56,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:56,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:56,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95313219] [2022-01-18 05:27:56,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95313219] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:56,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421437885] [2022-01-18 05:27:56,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:27:56,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:56,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:56,437 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:56,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 05:27:56,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:27:56,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:56,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:56,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:56,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:56,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421437885] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:56,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:56,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 05:27:56,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593076772] [2022-01-18 05:27:56,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:56,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 05:27:56,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:56,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 05:27:56,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:27:56,553 INFO L87 Difference]: Start difference. First operand 1058 states and 3698 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 05:27:56,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:56,710 INFO L93 Difference]: Finished difference Result 1982 states and 6436 transitions. [2022-01-18 05:27:56,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:27:56,710 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 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 05:27:56,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:56,713 INFO L225 Difference]: With dead ends: 1982 [2022-01-18 05:27:56,713 INFO L226 Difference]: Without dead ends: 1982 [2022-01-18 05:27:56,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:27:56,714 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 167 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:56,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 100 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:27:56,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1982 states. [2022-01-18 05:27:56,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1982 to 1118. [2022-01-18 05:27:56,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.5380483437779766) internal successors, (3952), 1117 states have internal predecessors, (3952), 0 states have call successors, (0), 0 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 05:27:56,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 3952 transitions. [2022-01-18 05:27:56,732 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 3952 transitions. Word has length 22 [2022-01-18 05:27:56,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:56,732 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 3952 transitions. [2022-01-18 05:27:56,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 05:27:56,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 3952 transitions. [2022-01-18 05:27:56,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:56,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:56,734 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 05:27:56,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:56,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:56,934 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:56,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:56,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1936642699, now seen corresponding path program 47 times [2022-01-18 05:27:56,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:56,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026317704] [2022-01-18 05:27:56,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:56,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:56,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:56,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:56,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:56,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026317704] [2022-01-18 05:27:56,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026317704] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:56,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476060823] [2022-01-18 05:27:56,956 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:27:56,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:56,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:56,959 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:56,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 05:27:56,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:27:56,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:56,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:56,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:57,055 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 05:27:57,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:57,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476060823] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:57,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:57,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 05:27:57,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085189496] [2022-01-18 05:27:57,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:57,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 05:27:57,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:57,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 05:27:57,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:27:57,089 INFO L87 Difference]: Start difference. First operand 1118 states and 3952 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:57,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:57,313 INFO L93 Difference]: Finished difference Result 1528 states and 5019 transitions. [2022-01-18 05:27:57,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 05:27:57,313 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:27:57,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:57,315 INFO L225 Difference]: With dead ends: 1528 [2022-01-18 05:27:57,315 INFO L226 Difference]: Without dead ends: 1504 [2022-01-18 05:27:57,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:27:57,316 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 168 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:57,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 162 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:27:57,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2022-01-18 05:27:57,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1118. [2022-01-18 05:27:57,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.5290957923008057) internal successors, (3942), 1117 states have internal predecessors, (3942), 0 states have call successors, (0), 0 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 05:27:57,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 3942 transitions. [2022-01-18 05:27:57,333 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 3942 transitions. Word has length 22 [2022-01-18 05:27:57,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:57,333 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 3942 transitions. [2022-01-18 05:27:57,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:57,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 3942 transitions. [2022-01-18 05:27:57,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:57,335 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:57,335 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 05:27:57,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:57,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2022-01-18 05:27:57,551 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:57,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:57,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1339423245, now seen corresponding path program 48 times [2022-01-18 05:27:57,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:57,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206225049] [2022-01-18 05:27:57,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:57,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:57,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:57,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:57,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206225049] [2022-01-18 05:27:57,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206225049] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:57,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573558712] [2022-01-18 05:27:57,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:27:57,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:57,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:57,573 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:57,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 05:27:57,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:27:57,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:57,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:57,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:57,646 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 05:27:57,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:57,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:57,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573558712] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:57,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:57,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 05:27:57,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547364278] [2022-01-18 05:27:57,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:57,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 05:27:57,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:57,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 05:27:57,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:27:57,675 INFO L87 Difference]: Start difference. First operand 1118 states and 3942 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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 05:27:57,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:57,846 INFO L93 Difference]: Finished difference Result 1348 states and 4465 transitions. [2022-01-18 05:27:57,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:27:57,847 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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 22 [2022-01-18 05:27:57,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:57,849 INFO L225 Difference]: With dead ends: 1348 [2022-01-18 05:27:57,849 INFO L226 Difference]: Without dead ends: 1348 [2022-01-18 05:27:57,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:27:57,849 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 104 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:57,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 114 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:27:57,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2022-01-18 05:27:57,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 1081. [2022-01-18 05:27:57,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 3.4935185185185187) internal successors, (3773), 1080 states have internal predecessors, (3773), 0 states have call successors, (0), 0 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 05:27:57,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 3773 transitions. [2022-01-18 05:27:57,864 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 3773 transitions. Word has length 22 [2022-01-18 05:27:57,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:57,864 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 3773 transitions. [2022-01-18 05:27:57,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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 05:27:57,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 3773 transitions. [2022-01-18 05:27:57,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:57,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:57,866 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 05:27:57,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-01-18 05:27:58,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:58,067 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:58,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:58,067 INFO L85 PathProgramCache]: Analyzing trace with hash -724972823, now seen corresponding path program 49 times [2022-01-18 05:27:58,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:58,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750144362] [2022-01-18 05:27:58,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:58,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:58,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:58,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:58,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750144362] [2022-01-18 05:27:58,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750144362] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:58,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182693423] [2022-01-18 05:27:58,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:27:58,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:58,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:58,089 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:58,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 05:27:58,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:58,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:58,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:58,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:27:58,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182693423] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:58,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:58,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 05:27:58,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160679917] [2022-01-18 05:27:58,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:58,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 05:27:58,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:58,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 05:27:58,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:27:58,190 INFO L87 Difference]: Start difference. First operand 1081 states and 3773 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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 05:27:58,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:58,384 INFO L93 Difference]: Finished difference Result 1884 states and 6113 transitions. [2022-01-18 05:27:58,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 05:27:58,384 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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 22 [2022-01-18 05:27:58,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:58,387 INFO L225 Difference]: With dead ends: 1884 [2022-01-18 05:27:58,387 INFO L226 Difference]: Without dead ends: 1879 [2022-01-18 05:27:58,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:27:58,387 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 184 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:58,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 132 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:27:58,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2022-01-18 05:27:58,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1045. [2022-01-18 05:27:58,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 3.4655172413793105) internal successors, (3618), 1044 states have internal predecessors, (3618), 0 states have call successors, (0), 0 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 05:27:58,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3618 transitions. [2022-01-18 05:27:58,404 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3618 transitions. Word has length 22 [2022-01-18 05:27:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:58,405 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 3618 transitions. [2022-01-18 05:27:58,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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 05:27:58,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3618 transitions. [2022-01-18 05:27:58,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:58,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:58,406 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 05:27:58,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:58,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:58,607 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:58,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:58,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1044869595, now seen corresponding path program 50 times [2022-01-18 05:27:58,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:58,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539406055] [2022-01-18 05:27:58,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:58,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:58,627 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 05:27:58,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:58,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539406055] [2022-01-18 05:27:58,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539406055] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:58,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462312164] [2022-01-18 05:27:58,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:27:58,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:58,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:58,629 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:58,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 05:27:58,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:27:58,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:58,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:58,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:58,699 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 05:27:58,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:58,727 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 05:27:58,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462312164] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:58,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:58,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 05:27:58,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583379562] [2022-01-18 05:27:58,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:58,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 05:27:58,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:58,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 05:27:58,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:27:58,728 INFO L87 Difference]: Start difference. First operand 1045 states and 3618 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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 05:27:58,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:58,907 INFO L93 Difference]: Finished difference Result 1515 states and 4939 transitions. [2022-01-18 05:27:58,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:27:58,907 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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 22 [2022-01-18 05:27:58,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:58,909 INFO L225 Difference]: With dead ends: 1515 [2022-01-18 05:27:58,909 INFO L226 Difference]: Without dead ends: 1507 [2022-01-18 05:27:58,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:27:58,910 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 129 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:58,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 120 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:27:58,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2022-01-18 05:27:58,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1045. [2022-01-18 05:27:58,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 3.4626436781609193) internal successors, (3615), 1044 states have internal predecessors, (3615), 0 states have call successors, (0), 0 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 05:27:58,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3615 transitions. [2022-01-18 05:27:58,923 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3615 transitions. Word has length 22 [2022-01-18 05:27:58,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:58,923 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 3615 transitions. [2022-01-18 05:27:58,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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 05:27:58,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3615 transitions. [2022-01-18 05:27:58,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:58,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:58,925 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 05:27:58,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-18 05:27:59,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:59,126 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:59,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:59,126 INFO L85 PathProgramCache]: Analyzing trace with hash 562039857, now seen corresponding path program 51 times [2022-01-18 05:27:59,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:59,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730085859] [2022-01-18 05:27:59,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:59,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:59,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:59,147 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 05:27:59,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:59,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730085859] [2022-01-18 05:27:59,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730085859] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:59,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76887871] [2022-01-18 05:27:59,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:27:59,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:59,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:59,148 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:59,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 05:27:59,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 05:27:59,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:59,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:59,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:59,210 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 05:27:59,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:59,238 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 05:27:59,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76887871] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:59,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:59,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-01-18 05:27:59,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492494732] [2022-01-18 05:27:59,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:59,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 05:27:59,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:59,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 05:27:59,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-18 05:27:59,239 INFO L87 Difference]: Start difference. First operand 1045 states and 3615 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:59,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:59,356 INFO L93 Difference]: Finished difference Result 1319 states and 4427 transitions. [2022-01-18 05:27:59,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 05:27:59,356 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:27:59,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:59,358 INFO L225 Difference]: With dead ends: 1319 [2022-01-18 05:27:59,358 INFO L226 Difference]: Without dead ends: 1319 [2022-01-18 05:27:59,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-01-18 05:27:59,359 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 68 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:59,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 99 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:27:59,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2022-01-18 05:27:59,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1053. [2022-01-18 05:27:59,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 3.467680608365019) internal successors, (3648), 1052 states have internal predecessors, (3648), 0 states have call successors, (0), 0 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 05:27:59,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 3648 transitions. [2022-01-18 05:27:59,372 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 3648 transitions. Word has length 22 [2022-01-18 05:27:59,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:59,372 INFO L470 AbstractCegarLoop]: Abstraction has 1053 states and 3648 transitions. [2022-01-18 05:27:59,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:59,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 3648 transitions. [2022-01-18 05:27:59,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 05:27:59,374 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:59,374 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 05:27:59,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-01-18 05:27:59,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:59,574 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:59,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:59,574 INFO L85 PathProgramCache]: Analyzing trace with hash 280304051, now seen corresponding path program 52 times [2022-01-18 05:27:59,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:59,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315464985] [2022-01-18 05:27:59,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:59,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:27:59,594 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 05:27:59,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:27:59,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315464985] [2022-01-18 05:27:59,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315464985] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:27:59,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929553444] [2022-01-18 05:27:59,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:27:59,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:59,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:27:59,595 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:27:59,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 05:27:59,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:27:59,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:27:59,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:27:59,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:27:59,656 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 05:27:59,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:27:59,683 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 05:27:59,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929553444] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:27:59,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:27:59,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-01-18 05:27:59,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586242599] [2022-01-18 05:27:59,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:27:59,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 05:27:59,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:27:59,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 05:27:59,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-18 05:27:59,684 INFO L87 Difference]: Start difference. First operand 1053 states and 3648 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:59,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:27:59,768 INFO L93 Difference]: Finished difference Result 1256 states and 4266 transitions. [2022-01-18 05:27:59,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:27:59,768 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 05:27:59,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:27:59,770 INFO L225 Difference]: With dead ends: 1256 [2022-01-18 05:27:59,770 INFO L226 Difference]: Without dead ends: 1247 [2022-01-18 05:27:59,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:27:59,770 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 75 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:27:59,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 56 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:27:59,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2022-01-18 05:27:59,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1053. [2022-01-18 05:27:59,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 3.466730038022814) internal successors, (3647), 1052 states have internal predecessors, (3647), 0 states have call successors, (0), 0 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 05:27:59,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 3647 transitions. [2022-01-18 05:27:59,783 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 3647 transitions. Word has length 22 [2022-01-18 05:27:59,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:27:59,783 INFO L470 AbstractCegarLoop]: Abstraction has 1053 states and 3647 transitions. [2022-01-18 05:27:59,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:27:59,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 3647 transitions. [2022-01-18 05:27:59,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:27:59,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:27:59,785 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] [2022-01-18 05:27:59,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-01-18 05:27:59,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:27:59,996 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:27:59,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:27:59,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1982381327, now seen corresponding path program 53 times [2022-01-18 05:27:59,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:27:59,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858030485] [2022-01-18 05:27:59,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:27:59,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:27:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:00,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:00,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858030485] [2022-01-18 05:28:00,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858030485] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:00,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39015116] [2022-01-18 05:28:00,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:28:00,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:00,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:00,190 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:28:00,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 05:28:00,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:28:00,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:00,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:28:00,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:00,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:00,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:00,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:00,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:00,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:28:00,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:00,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:00,740 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:28:00,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:28:00,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:00,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:00,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:00,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:00,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:28:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:00,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39015116] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:00,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:00,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:28:00,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946814810] [2022-01-18 05:28:00,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:00,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:28:00,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:00,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:28:00,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:28:00,806 INFO L87 Difference]: Start difference. First operand 1053 states and 3647 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:02,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:02,717 INFO L93 Difference]: Finished difference Result 2238 states and 7334 transitions. [2022-01-18 05:28:02,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 05:28:02,717 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:28:02,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:02,721 INFO L225 Difference]: With dead ends: 2238 [2022-01-18 05:28:02,721 INFO L226 Difference]: Without dead ends: 2218 [2022-01-18 05:28:02,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=315, Invalid=3345, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 05:28:02,722 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 340 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 2725 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 3599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 828 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:02,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 295 Invalid, 3599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2725 Invalid, 0 Unknown, 828 Unchecked, 1.0s Time] [2022-01-18 05:28:02,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2022-01-18 05:28:02,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 1144. [2022-01-18 05:28:02,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1143 states have (on average 3.41907261592301) internal successors, (3908), 1143 states have internal predecessors, (3908), 0 states have call successors, (0), 0 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 05:28:02,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 3908 transitions. [2022-01-18 05:28:02,743 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 3908 transitions. Word has length 24 [2022-01-18 05:28:02,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:02,743 INFO L470 AbstractCegarLoop]: Abstraction has 1144 states and 3908 transitions. [2022-01-18 05:28:02,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:02,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 3908 transitions. [2022-01-18 05:28:02,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:28:02,746 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:02,746 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] [2022-01-18 05:28:02,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-01-18 05:28:02,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-01-18 05:28:02,947 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:28:02,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:02,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1203543731, now seen corresponding path program 54 times [2022-01-18 05:28:02,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:02,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086457882] [2022-01-18 05:28:02,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:02,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:02,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:03,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:03,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086457882] [2022-01-18 05:28:03,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086457882] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:03,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871773768] [2022-01-18 05:28:03,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:28:03,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:03,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:03,135 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:28:03,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 05:28:03,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:28:03,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:03,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 05:28:03,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:03,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:03,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:03,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:03,662 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:03,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 43 [2022-01-18 05:28:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:03,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:04,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:04,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:04,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:04,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:04,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 7 [2022-01-18 05:28:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:04,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871773768] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:04,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:04,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-01-18 05:28:04,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765152038] [2022-01-18 05:28:04,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:04,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:28:04,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:04,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:28:04,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:28:04,424 INFO L87 Difference]: Start difference. First operand 1144 states and 3908 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:05,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:05,890 INFO L93 Difference]: Finished difference Result 2453 states and 8302 transitions. [2022-01-18 05:28:05,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 05:28:05,890 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:28:05,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:05,894 INFO L225 Difference]: With dead ends: 2453 [2022-01-18 05:28:05,895 INFO L226 Difference]: Without dead ends: 2451 [2022-01-18 05:28:05,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=405, Invalid=3501, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 05:28:05,895 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 209 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 2716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1761 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:05,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 227 Invalid, 2716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 936 Invalid, 0 Unknown, 1761 Unchecked, 0.3s Time] [2022-01-18 05:28:05,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2022-01-18 05:28:05,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1173. [2022-01-18 05:28:05,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 3.409556313993174) internal successors, (3996), 1172 states have internal predecessors, (3996), 0 states have call successors, (0), 0 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 05:28:05,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3996 transitions. [2022-01-18 05:28:05,925 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3996 transitions. Word has length 24 [2022-01-18 05:28:05,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:05,925 INFO L470 AbstractCegarLoop]: Abstraction has 1173 states and 3996 transitions. [2022-01-18 05:28:05,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:05,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3996 transitions. [2022-01-18 05:28:05,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:28:05,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:05,926 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] [2022-01-18 05:28:05,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-01-18 05:28:06,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-01-18 05:28:06,127 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:28:06,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:06,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1332626450, now seen corresponding path program 4 times [2022-01-18 05:28:06,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:06,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062243590] [2022-01-18 05:28:06,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:06,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:06,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:06,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062243590] [2022-01-18 05:28:06,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062243590] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:06,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357204375] [2022-01-18 05:28:06,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:28:06,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:06,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:06,348 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:28:06,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:28:06,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:06,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 05:28:06,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:28:06,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:06,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:06,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:06,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:06,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:06,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:28:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:06,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:06,906 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:28:06,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:28:06,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:06,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:06,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:06,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:06,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:28:06,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:06,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357204375] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:06,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:06,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:28:06,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915755900] [2022-01-18 05:28:06,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:06,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:28:06,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:06,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:28:06,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:28:06,971 INFO L87 Difference]: Start difference. First operand 1173 states and 3996 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:08,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:08,522 INFO L93 Difference]: Finished difference Result 2258 states and 7228 transitions. [2022-01-18 05:28:08,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 05:28:08,523 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:28:08,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:08,526 INFO L225 Difference]: With dead ends: 2258 [2022-01-18 05:28:08,526 INFO L226 Difference]: Without dead ends: 2248 [2022-01-18 05:28:08,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=238, Invalid=2312, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 05:28:08,527 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 332 mSDsluCounter, 1728 mSDsCounter, 0 mSdLazyCounter, 2451 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 3537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1044 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:08,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 208 Invalid, 3537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2451 Invalid, 0 Unknown, 1044 Unchecked, 0.9s Time] [2022-01-18 05:28:08,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2022-01-18 05:28:08,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 1125. [2022-01-18 05:28:08,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 3.4412811387900355) internal successors, (3868), 1124 states have internal predecessors, (3868), 0 states have call successors, (0), 0 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 05:28:08,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 3868 transitions. [2022-01-18 05:28:08,545 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 3868 transitions. Word has length 24 [2022-01-18 05:28:08,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:08,545 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 3868 transitions. [2022-01-18 05:28:08,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:08,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 3868 transitions. [2022-01-18 05:28:08,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:28:08,546 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:08,546 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] [2022-01-18 05:28:08,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-01-18 05:28:08,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-01-18 05:28:08,747 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:28:08,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:08,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1328662509, now seen corresponding path program 55 times [2022-01-18 05:28:08,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:08,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174419340] [2022-01-18 05:28:08,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:08,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:08,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:08,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:08,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174419340] [2022-01-18 05:28:08,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174419340] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:08,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382686517] [2022-01-18 05:28:08,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:28:08,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:08,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:08,940 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:28:08,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 05:28:08,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:08,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:28:08,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:09,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:09,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:09,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:09,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:09,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:28:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:09,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:09,487 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:28:09,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:28:09,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:09,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:09,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:09,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:09,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:28:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:09,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382686517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:09,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:09,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:28:09,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460014472] [2022-01-18 05:28:09,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:09,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:28:09,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:09,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:28:09,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:28:09,548 INFO L87 Difference]: Start difference. First operand 1125 states and 3868 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:11,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:11,137 INFO L93 Difference]: Finished difference Result 2108 states and 6761 transitions. [2022-01-18 05:28:11,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 05:28:11,137 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:28:11,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:11,141 INFO L225 Difference]: With dead ends: 2108 [2022-01-18 05:28:11,141 INFO L226 Difference]: Without dead ends: 2101 [2022-01-18 05:28:11,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=274, Invalid=2588, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 05:28:11,141 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 224 mSDsluCounter, 1328 mSDsCounter, 0 mSdLazyCounter, 2104 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 2619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 475 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:11,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 201 Invalid, 2619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2104 Invalid, 0 Unknown, 475 Unchecked, 0.8s Time] [2022-01-18 05:28:11,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2022-01-18 05:28:11,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 1165. [2022-01-18 05:28:11,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 3.4140893470790377) internal successors, (3974), 1164 states have internal predecessors, (3974), 0 states have call successors, (0), 0 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 05:28:11,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3974 transitions. [2022-01-18 05:28:11,160 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3974 transitions. Word has length 24 [2022-01-18 05:28:11,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:11,160 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 3974 transitions. [2022-01-18 05:28:11,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:11,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3974 transitions. [2022-01-18 05:28:11,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:28:11,161 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:11,161 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] [2022-01-18 05:28:11,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-01-18 05:28:11,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-01-18 05:28:11,362 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:28:11,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:11,362 INFO L85 PathProgramCache]: Analyzing trace with hash -825385579, now seen corresponding path program 56 times [2022-01-18 05:28:11,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:11,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982254039] [2022-01-18 05:28:11,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:11,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:11,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:11,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:11,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982254039] [2022-01-18 05:28:11,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982254039] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:11,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135623043] [2022-01-18 05:28:11,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:28:11,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:11,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:11,549 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:28:11,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 05:28:11,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:28:11,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:11,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:28:11,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:12,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:12,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:12,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:12,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:12,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 05:28:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:12,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:12,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:12,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:12,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-01-18 05:28:12,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:12,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135623043] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:12,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:12,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-01-18 05:28:12,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683652789] [2022-01-18 05:28:12,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:12,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:28:12,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:12,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:28:12,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:28:12,608 INFO L87 Difference]: Start difference. First operand 1165 states and 3974 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:28:14,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:14,568 INFO L93 Difference]: Finished difference Result 2244 states and 7154 transitions. [2022-01-18 05:28:14,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 05:28:14,568 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:28:14,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:14,572 INFO L225 Difference]: With dead ends: 2244 [2022-01-18 05:28:14,572 INFO L226 Difference]: Without dead ends: 2227 [2022-01-18 05:28:14,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=558, Invalid=4992, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 05:28:14,573 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 233 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 1670 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 2271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 545 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:14,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 344 Invalid, 2271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1670 Invalid, 0 Unknown, 545 Unchecked, 0.6s Time] [2022-01-18 05:28:14,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2227 states. [2022-01-18 05:28:14,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2227 to 1216. [2022-01-18 05:28:14,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 3.3810699588477364) internal successors, (4108), 1215 states have internal predecessors, (4108), 0 states have call successors, (0), 0 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 05:28:14,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 4108 transitions. [2022-01-18 05:28:14,591 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 4108 transitions. Word has length 24 [2022-01-18 05:28:14,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:14,592 INFO L470 AbstractCegarLoop]: Abstraction has 1216 states and 4108 transitions. [2022-01-18 05:28:14,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:28:14,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 4108 transitions. [2022-01-18 05:28:14,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:28:14,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:14,593 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] [2022-01-18 05:28:14,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-01-18 05:28:14,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:14,794 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:28:14,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:14,794 INFO L85 PathProgramCache]: Analyzing trace with hash -696302860, now seen corresponding path program 5 times [2022-01-18 05:28:14,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:14,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558752821] [2022-01-18 05:28:14,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:14,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:15,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:15,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:15,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558752821] [2022-01-18 05:28:15,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558752821] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:15,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099086046] [2022-01-18 05:28:15,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:28:15,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:15,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:15,006 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:28:15,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 05:28:15,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:28:15,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:15,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:28:15,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:15,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:15,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:15,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:15,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:15,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:28:15,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:15,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:15,542 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:28:15,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:28:15,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:15,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:15,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:15,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:15,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:28:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:15,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099086046] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:15,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:15,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:28:15,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061912164] [2022-01-18 05:28:15,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:15,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:28:15,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:15,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:28:15,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:28:15,609 INFO L87 Difference]: Start difference. First operand 1216 states and 4108 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:17,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:17,229 INFO L93 Difference]: Finished difference Result 2489 states and 8068 transitions. [2022-01-18 05:28:17,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 05:28:17,230 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:28:17,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:17,234 INFO L225 Difference]: With dead ends: 2489 [2022-01-18 05:28:17,234 INFO L226 Difference]: Without dead ends: 2482 [2022-01-18 05:28:17,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=279, Invalid=2583, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 05:28:17,234 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 233 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 2050 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 2812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 719 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:17,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 233 Invalid, 2812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2050 Invalid, 0 Unknown, 719 Unchecked, 0.8s Time] [2022-01-18 05:28:17,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2482 states. [2022-01-18 05:28:17,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2482 to 1182. [2022-01-18 05:28:17,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 3.4106689246401354) internal successors, (4028), 1181 states have internal predecessors, (4028), 0 states have call successors, (0), 0 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 05:28:17,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 4028 transitions. [2022-01-18 05:28:17,254 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 4028 transitions. Word has length 24 [2022-01-18 05:28:17,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:17,255 INFO L470 AbstractCegarLoop]: Abstraction has 1182 states and 4028 transitions. [2022-01-18 05:28:17,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:17,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 4028 transitions. [2022-01-18 05:28:17,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:28:17,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:17,257 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] [2022-01-18 05:28:17,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-01-18 05:28:17,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:17,457 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:28:17,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:17,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1876273715, now seen corresponding path program 57 times [2022-01-18 05:28:17,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:17,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439499470] [2022-01-18 05:28:17,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:17,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:17,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:17,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:17,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439499470] [2022-01-18 05:28:17,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439499470] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:17,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376839294] [2022-01-18 05:28:17,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:28:17,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:17,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:17,661 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:28:17,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 05:28:17,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:28:17,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:17,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:28:17,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:18,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:18,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:18,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:18,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:18,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 05:28:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:18,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:18,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:18,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:18,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-01-18 05:28:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:18,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376839294] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:18,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:18,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-01-18 05:28:18,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446814368] [2022-01-18 05:28:18,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:18,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:28:18,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:18,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:28:18,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:28:18,683 INFO L87 Difference]: Start difference. First operand 1182 states and 4028 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:28:19,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:19,911 INFO L93 Difference]: Finished difference Result 2242 states and 7149 transitions. [2022-01-18 05:28:19,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 05:28:19,911 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:28:19,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:19,915 INFO L225 Difference]: With dead ends: 2242 [2022-01-18 05:28:19,915 INFO L226 Difference]: Without dead ends: 2232 [2022-01-18 05:28:19,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=321, Invalid=2985, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 05:28:19,915 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 268 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 624 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:19,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 319 Invalid, 1928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1287 Invalid, 0 Unknown, 624 Unchecked, 0.5s Time] [2022-01-18 05:28:19,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2022-01-18 05:28:19,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 1224. [2022-01-18 05:28:19,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 3.3810302534750614) internal successors, (4135), 1223 states have internal predecessors, (4135), 0 states have call successors, (0), 0 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 05:28:19,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 4135 transitions. [2022-01-18 05:28:19,935 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 4135 transitions. Word has length 24 [2022-01-18 05:28:19,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:19,935 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 4135 transitions. [2022-01-18 05:28:19,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:28:19,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 4135 transitions. [2022-01-18 05:28:19,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:28:19,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:19,937 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] [2022-01-18 05:28:19,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-01-18 05:28:20,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-01-18 05:28:20,137 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:28:20,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:20,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1043483089, now seen corresponding path program 58 times [2022-01-18 05:28:20,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:20,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177382039] [2022-01-18 05:28:20,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:20,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:20,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:20,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:20,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177382039] [2022-01-18 05:28:20,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177382039] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:20,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162009008] [2022-01-18 05:28:20,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:28:20,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:20,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:20,320 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:28:20,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 05:28:20,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:28:20,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:20,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:28:20,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:20,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:20,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:20,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:20,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:20,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:28:20,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:20,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:20,860 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:28:20,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:28:20,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:20,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:20,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:20,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:20,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:28:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:20,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162009008] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:20,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:20,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:28:20,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039969416] [2022-01-18 05:28:20,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:20,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:28:20,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:20,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:28:20,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:28:20,914 INFO L87 Difference]: Start difference. First operand 1224 states and 4135 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:22,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:22,940 INFO L93 Difference]: Finished difference Result 2323 states and 7425 transitions. [2022-01-18 05:28:22,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 05:28:22,940 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:28:22,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:22,944 INFO L225 Difference]: With dead ends: 2323 [2022-01-18 05:28:22,944 INFO L226 Difference]: Without dead ends: 2312 [2022-01-18 05:28:22,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=367, Invalid=4055, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 05:28:22,945 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 278 mSDsluCounter, 2046 mSDsCounter, 0 mSdLazyCounter, 2533 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 3636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1064 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:22,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 364 Invalid, 3636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2533 Invalid, 0 Unknown, 1064 Unchecked, 0.9s Time] [2022-01-18 05:28:22,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2022-01-18 05:28:22,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1189. [2022-01-18 05:28:22,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 3.4116161616161618) internal successors, (4053), 1188 states have internal predecessors, (4053), 0 states have call successors, (0), 0 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 05:28:22,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 4053 transitions. [2022-01-18 05:28:22,964 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 4053 transitions. Word has length 24 [2022-01-18 05:28:22,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:22,964 INFO L470 AbstractCegarLoop]: Abstraction has 1189 states and 4053 transitions. [2022-01-18 05:28:22,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:22,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 4053 transitions. [2022-01-18 05:28:22,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:28:22,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:22,966 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] [2022-01-18 05:28:22,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-01-18 05:28:23,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-01-18 05:28:23,166 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:28:23,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:23,166 INFO L85 PathProgramCache]: Analyzing trace with hash 79322356, now seen corresponding path program 6 times [2022-01-18 05:28:23,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:23,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381940131] [2022-01-18 05:28:23,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:23,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:23,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:23,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381940131] [2022-01-18 05:28:23,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381940131] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:23,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237985032] [2022-01-18 05:28:23,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:28:23,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:23,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:23,378 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:28:23,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 05:28:23,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:28:23,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:23,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 05:28:23,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:23,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:23,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:23,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:23,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:23,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-01-18 05:28:23,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:23,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:24,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:24,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:24,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 17 treesize of output 42 [2022-01-18 05:28:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:24,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237985032] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:24,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:24,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 34 [2022-01-18 05:28:24,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038451781] [2022-01-18 05:28:24,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:24,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 05:28:24,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:24,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 05:28:24,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:28:24,239 INFO L87 Difference]: Start difference. First operand 1189 states and 4053 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:25,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:25,685 INFO L93 Difference]: Finished difference Result 2483 states and 8473 transitions. [2022-01-18 05:28:25,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 05:28:25,685 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:28:25,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:25,689 INFO L225 Difference]: With dead ends: 2483 [2022-01-18 05:28:25,689 INFO L226 Difference]: Without dead ends: 2473 [2022-01-18 05:28:25,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=439, Invalid=3851, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 05:28:25,690 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 271 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 1709 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 2502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 751 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:25,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 216 Invalid, 2502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1709 Invalid, 0 Unknown, 751 Unchecked, 0.6s Time] [2022-01-18 05:28:25,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2022-01-18 05:28:25,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 1210. [2022-01-18 05:28:25,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 3.3928866832092637) internal successors, (4102), 1209 states have internal predecessors, (4102), 0 states have call successors, (0), 0 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 05:28:25,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 4102 transitions. [2022-01-18 05:28:25,710 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 4102 transitions. Word has length 24 [2022-01-18 05:28:25,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:25,710 INFO L470 AbstractCegarLoop]: Abstraction has 1210 states and 4102 transitions. [2022-01-18 05:28:25,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:25,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 4102 transitions. [2022-01-18 05:28:25,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:28:25,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:25,712 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] [2022-01-18 05:28:25,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-01-18 05:28:25,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-01-18 05:28:25,912 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:28:25,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:25,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1185123218, now seen corresponding path program 7 times [2022-01-18 05:28:25,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:25,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188586245] [2022-01-18 05:28:25,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:25,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:26,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:26,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188586245] [2022-01-18 05:28:26,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188586245] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:26,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585713406] [2022-01-18 05:28:26,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:28:26,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:26,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:26,133 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:28:26,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 05:28:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:26,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:28:26,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:26,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:26,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:26,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:26,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:26,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:28:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:26,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:26,681 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:28:26,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:28:26,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:26,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:26,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:26,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:26,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:28:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:26,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585713406] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:26,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:26,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:28:26,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246237739] [2022-01-18 05:28:26,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:26,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:28:26,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:26,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:28:26,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:28:26,754 INFO L87 Difference]: Start difference. First operand 1210 states and 4102 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:28,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:28,712 INFO L93 Difference]: Finished difference Result 2218 states and 7165 transitions. [2022-01-18 05:28:28,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 05:28:28,713 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:28:28,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:28,716 INFO L225 Difference]: With dead ends: 2218 [2022-01-18 05:28:28,716 INFO L226 Difference]: Without dead ends: 2213 [2022-01-18 05:28:28,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=316, Invalid=2990, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 05:28:28,716 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 268 mSDsluCounter, 2227 mSDsCounter, 0 mSdLazyCounter, 2650 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 4059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1378 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:28,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 298 Invalid, 4059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2650 Invalid, 0 Unknown, 1378 Unchecked, 1.0s Time] [2022-01-18 05:28:28,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2022-01-18 05:28:28,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 1167. [2022-01-18 05:28:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1166 states have (on average 3.4219554030874786) internal successors, (3990), 1166 states have internal predecessors, (3990), 0 states have call successors, (0), 0 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 05:28:28,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 3990 transitions. [2022-01-18 05:28:28,736 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 3990 transitions. Word has length 24 [2022-01-18 05:28:28,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:28,736 INFO L470 AbstractCegarLoop]: Abstraction has 1167 states and 3990 transitions. [2022-01-18 05:28:28,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:28,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 3990 transitions. [2022-01-18 05:28:28,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:28:28,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:28,737 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] [2022-01-18 05:28:28,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-01-18 05:28:28,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:28,938 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:28:28,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:28,938 INFO L85 PathProgramCache]: Analyzing trace with hash 608816537, now seen corresponding path program 59 times [2022-01-18 05:28:28,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:28,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442432365] [2022-01-18 05:28:28,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:28,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:28,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:29,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:29,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442432365] [2022-01-18 05:28:29,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442432365] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:29,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735910982] [2022-01-18 05:28:29,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:28:29,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:29,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:29,145 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:28:29,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 05:28:29,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:28:29,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:29,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:28:29,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:29,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:29,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:29,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:29,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:29,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:28:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:29,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:29,692 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:28:29,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:28:29,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:29,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:29,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:29,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:29,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:28:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:29,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735910982] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:29,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:29,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:28:29,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230956329] [2022-01-18 05:28:29,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:29,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:28:29,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:29,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:28:29,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:28:29,763 INFO L87 Difference]: Start difference. First operand 1167 states and 3990 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:31,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:31,104 INFO L93 Difference]: Finished difference Result 1768 states and 5895 transitions. [2022-01-18 05:28:31,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 05:28:31,104 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:28:31,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:31,107 INFO L225 Difference]: With dead ends: 1768 [2022-01-18 05:28:31,107 INFO L226 Difference]: Without dead ends: 1761 [2022-01-18 05:28:31,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=242, Invalid=2308, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 05:28:31,108 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 181 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 1658 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:31,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 144 Invalid, 2073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1658 Invalid, 0 Unknown, 373 Unchecked, 0.6s Time] [2022-01-18 05:28:31,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2022-01-18 05:28:31,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1187. [2022-01-18 05:28:31,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1186 states have (on average 3.4106239460370995) internal successors, (4045), 1186 states have internal predecessors, (4045), 0 states have call successors, (0), 0 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 05:28:31,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 4045 transitions. [2022-01-18 05:28:31,125 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 4045 transitions. Word has length 24 [2022-01-18 05:28:31,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:31,125 INFO L470 AbstractCegarLoop]: Abstraction has 1187 states and 4045 transitions. [2022-01-18 05:28:31,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:31,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 4045 transitions. [2022-01-18 05:28:31,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:28:31,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:31,127 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] [2022-01-18 05:28:31,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-01-18 05:28:31,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:31,339 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:28:31,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:31,340 INFO L85 PathProgramCache]: Analyzing trace with hash -655629037, now seen corresponding path program 60 times [2022-01-18 05:28:31,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:31,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427300440] [2022-01-18 05:28:31,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:31,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:31,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:31,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:31,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427300440] [2022-01-18 05:28:31,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427300440] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:31,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220755015] [2022-01-18 05:28:31,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:28:31,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:31,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:31,528 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:28:31,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-18 05:28:31,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:28:31,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:31,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 05:28:31,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:32,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:32,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:32,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:32,064 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:32,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2022-01-18 05:28:32,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:32,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:32,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:32,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:32,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:32,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:32,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 7 [2022-01-18 05:28:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:32,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220755015] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:32,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:32,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-01-18 05:28:32,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615281836] [2022-01-18 05:28:32,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:32,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:28:32,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:32,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:28:32,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:28:32,781 INFO L87 Difference]: Start difference. First operand 1187 states and 4045 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:34,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:34,637 INFO L93 Difference]: Finished difference Result 2469 states and 8328 transitions. [2022-01-18 05:28:34,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 05:28:34,637 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:28:34,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:34,641 INFO L225 Difference]: With dead ends: 2469 [2022-01-18 05:28:34,641 INFO L226 Difference]: Without dead ends: 2467 [2022-01-18 05:28:34,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 30 SyntacticMatches, 10 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=444, Invalid=4812, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 05:28:34,642 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 279 mSDsluCounter, 1800 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 4045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3165 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:34,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 231 Invalid, 4045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 842 Invalid, 0 Unknown, 3165 Unchecked, 0.3s Time] [2022-01-18 05:28:34,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2022-01-18 05:28:34,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 1214. [2022-01-18 05:28:34,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 3.3940643033800493) internal successors, (4117), 1213 states have internal predecessors, (4117), 0 states have call successors, (0), 0 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 05:28:34,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 4117 transitions. [2022-01-18 05:28:34,663 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 4117 transitions. Word has length 24 [2022-01-18 05:28:34,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:34,663 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 4117 transitions. [2022-01-18 05:28:34,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:34,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 4117 transitions. [2022-01-18 05:28:34,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:28:34,665 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:34,665 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] [2022-01-18 05:28:34,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-01-18 05:28:34,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:34,865 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:28:34,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:34,865 INFO L85 PathProgramCache]: Analyzing trace with hash 577333074, now seen corresponding path program 8 times [2022-01-18 05:28:34,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:34,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467943117] [2022-01-18 05:28:34,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:34,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:35,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:35,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:35,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467943117] [2022-01-18 05:28:35,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467943117] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:35,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278761136] [2022-01-18 05:28:35,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:28:35,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:35,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:35,083 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:28:35,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-18 05:28:35,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:28:35,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:35,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:28:35,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:35,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:35,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:35,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:35,405 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:35,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2022-01-18 05:28:35,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:35,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:35,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:35,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:35,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:36,007 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:36,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 50 [2022-01-18 05:28:36,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:36,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278761136] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:36,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:36,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-01-18 05:28:36,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699513142] [2022-01-18 05:28:36,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:36,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:28:36,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:36,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:28:36,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:28:36,094 INFO L87 Difference]: Start difference. First operand 1214 states and 4117 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:28:40,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:40,818 INFO L93 Difference]: Finished difference Result 3512 states and 12210 transitions. [2022-01-18 05:28:40,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-18 05:28:40,818 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:28:40,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:40,825 INFO L225 Difference]: With dead ends: 3512 [2022-01-18 05:28:40,825 INFO L226 Difference]: Without dead ends: 3500 [2022-01-18 05:28:40,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2807 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1081, Invalid=8425, Unknown=0, NotChecked=0, Total=9506 [2022-01-18 05:28:40,825 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 359 mSDsluCounter, 1607 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 3729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2185 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:40,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 247 Invalid, 3729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1491 Invalid, 0 Unknown, 2185 Unchecked, 0.6s Time] [2022-01-18 05:28:40,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2022-01-18 05:28:40,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 1290. [2022-01-18 05:28:40,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 1289 states have (on average 3.3622963537626065) internal successors, (4334), 1289 states have internal predecessors, (4334), 0 states have call successors, (0), 0 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 05:28:40,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 4334 transitions. [2022-01-18 05:28:40,851 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 4334 transitions. Word has length 24 [2022-01-18 05:28:40,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:40,851 INFO L470 AbstractCegarLoop]: Abstraction has 1290 states and 4334 transitions. [2022-01-18 05:28:40,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:28:40,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 4334 transitions. [2022-01-18 05:28:40,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:28:40,852 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:40,852 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] [2022-01-18 05:28:40,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-01-18 05:28:41,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:41,055 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:28:41,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:41,055 INFO L85 PathProgramCache]: Analyzing trace with hash 532275187, now seen corresponding path program 61 times [2022-01-18 05:28:41,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:41,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193012712] [2022-01-18 05:28:41,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:41,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:41,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:41,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:41,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193012712] [2022-01-18 05:28:41,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193012712] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:41,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21123185] [2022-01-18 05:28:41,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:28:41,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:41,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:41,248 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:28:41,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-18 05:28:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:41,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:28:41,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:41,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:41,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:41,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:41,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:41,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:28:41,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:41,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:41,751 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:28:41,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:28:41,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:41,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:41,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:41,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:41,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:28:41,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:41,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21123185] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:41,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:41,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:28:41,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987886680] [2022-01-18 05:28:41,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:41,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:28:41,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:41,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:28:41,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:28:41,817 INFO L87 Difference]: Start difference. First operand 1290 states and 4334 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:28:42,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:42,997 INFO L93 Difference]: Finished difference Result 2314 states and 7727 transitions. [2022-01-18 05:28:42,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 05:28:42,997 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:28:42,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:43,002 INFO L225 Difference]: With dead ends: 2314 [2022-01-18 05:28:43,002 INFO L226 Difference]: Without dead ends: 2307 [2022-01-18 05:28:43,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=279, Invalid=2073, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 05:28:43,002 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 198 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 1531 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 483 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:43,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 156 Invalid, 2061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1531 Invalid, 0 Unknown, 483 Unchecked, 0.6s Time] [2022-01-18 05:28:43,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2022-01-18 05:28:43,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 1339. [2022-01-18 05:28:43,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1338 states have (on average 3.3520179372197307) internal successors, (4485), 1338 states have internal predecessors, (4485), 0 states have call successors, (0), 0 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 05:28:43,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 4485 transitions. [2022-01-18 05:28:43,024 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 4485 transitions. Word has length 24 [2022-01-18 05:28:43,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:43,025 INFO L470 AbstractCegarLoop]: Abstraction has 1339 states and 4485 transitions. [2022-01-18 05:28:43,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:28:43,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 4485 transitions. [2022-01-18 05:28:43,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:28:43,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:43,026 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] [2022-01-18 05:28:43,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-01-18 05:28:43,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-01-18 05:28:43,242 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:28:43,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:43,242 INFO L85 PathProgramCache]: Analyzing trace with hash 335761682, now seen corresponding path program 9 times [2022-01-18 05:28:43,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:43,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161399982] [2022-01-18 05:28:43,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:43,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:43,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:43,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161399982] [2022-01-18 05:28:43,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161399982] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:43,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146121764] [2022-01-18 05:28:43,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:28:43,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:43,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:43,446 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:28:43,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-18 05:28:43,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:28:43,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:43,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:28:43,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:43,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:43,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:43,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:43,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:43,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-01-18 05:28:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:43,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:44,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:44,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:44,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-01-18 05:28:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:44,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146121764] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:44,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:44,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-18 05:28:44,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888583089] [2022-01-18 05:28:44,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:44,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:28:44,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:44,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:28:44,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:28:44,396 INFO L87 Difference]: Start difference. First operand 1339 states and 4485 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:28:46,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:46,814 INFO L93 Difference]: Finished difference Result 2562 states and 8265 transitions. [2022-01-18 05:28:46,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 05:28:46,814 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:28:46,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:46,819 INFO L225 Difference]: With dead ends: 2562 [2022-01-18 05:28:46,819 INFO L226 Difference]: Without dead ends: 2543 [2022-01-18 05:28:46,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=581, Invalid=4969, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 05:28:46,819 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 389 mSDsluCounter, 1981 mSDsCounter, 0 mSdLazyCounter, 2076 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 3240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1065 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:46,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 308 Invalid, 3240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2076 Invalid, 0 Unknown, 1065 Unchecked, 0.8s Time] [2022-01-18 05:28:46,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2022-01-18 05:28:46,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 1371. [2022-01-18 05:28:46,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1370 states have (on average 3.3445255474452553) internal successors, (4582), 1370 states have internal predecessors, (4582), 0 states have call successors, (0), 0 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 05:28:46,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 4582 transitions. [2022-01-18 05:28:46,842 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 4582 transitions. Word has length 24 [2022-01-18 05:28:46,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:46,842 INFO L470 AbstractCegarLoop]: Abstraction has 1371 states and 4582 transitions. [2022-01-18 05:28:46,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:28:46,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 4582 transitions. [2022-01-18 05:28:46,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:28:46,844 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:46,844 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] [2022-01-18 05:28:46,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-01-18 05:28:47,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-01-18 05:28:47,044 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:28:47,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:47,044 INFO L85 PathProgramCache]: Analyzing trace with hash 911530733, now seen corresponding path program 62 times [2022-01-18 05:28:47,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:47,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587126823] [2022-01-18 05:28:47,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:47,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:47,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:47,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:47,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587126823] [2022-01-18 05:28:47,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587126823] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:47,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347700129] [2022-01-18 05:28:47,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:28:47,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:47,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:47,246 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:28:47,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-18 05:28:47,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:28:47,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:47,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:28:47,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:47,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:47,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:47,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:47,555 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:47,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 05:28:47,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:47,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:48,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:48,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:48,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:48,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:28:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:48,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347700129] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:48,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:48,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:28:48,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380850299] [2022-01-18 05:28:48,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:48,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:28:48,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:48,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:28:48,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:28:48,350 INFO L87 Difference]: Start difference. First operand 1371 states and 4582 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:28:49,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:49,699 INFO L93 Difference]: Finished difference Result 3295 states and 11576 transitions. [2022-01-18 05:28:49,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 05:28:49,699 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:28:49,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:49,705 INFO L225 Difference]: With dead ends: 3295 [2022-01-18 05:28:49,706 INFO L226 Difference]: Without dead ends: 3283 [2022-01-18 05:28:49,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=407, Invalid=3133, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 05:28:49,706 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 183 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 982 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:49,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 117 Invalid, 1712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 696 Invalid, 0 Unknown, 982 Unchecked, 0.3s Time] [2022-01-18 05:28:49,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2022-01-18 05:28:49,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 1421. [2022-01-18 05:28:49,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1420 states have (on average 3.3422535211267608) internal successors, (4746), 1420 states have internal predecessors, (4746), 0 states have call successors, (0), 0 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 05:28:49,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 4746 transitions. [2022-01-18 05:28:49,732 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 4746 transitions. Word has length 24 [2022-01-18 05:28:49,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:49,733 INFO L470 AbstractCegarLoop]: Abstraction has 1421 states and 4746 transitions. [2022-01-18 05:28:49,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:28:49,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 4746 transitions. [2022-01-18 05:28:49,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:28:49,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:49,734 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] [2022-01-18 05:28:49,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-01-18 05:28:49,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-01-18 05:28:49,935 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:28:49,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:49,935 INFO L85 PathProgramCache]: Analyzing trace with hash -743780497, now seen corresponding path program 63 times [2022-01-18 05:28:49,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:49,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162255094] [2022-01-18 05:28:49,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:49,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:49,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:50,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:50,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162255094] [2022-01-18 05:28:50,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162255094] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:50,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581867409] [2022-01-18 05:28:50,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:28:50,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:50,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:50,168 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:28:50,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-18 05:28:50,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:28:50,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:50,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:28:50,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:50,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:50,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:50,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:50,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:50,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 05:28:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:50,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:51,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:51,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:28:51,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-01-18 05:28:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:51,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581867409] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:51,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:51,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-18 05:28:51,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002677745] [2022-01-18 05:28:51,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:51,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:28:51,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:51,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:28:51,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:28:51,140 INFO L87 Difference]: Start difference. First operand 1421 states and 4746 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:28:53,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:53,956 INFO L93 Difference]: Finished difference Result 2354 states and 7764 transitions. [2022-01-18 05:28:53,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 05:28:53,956 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:28:53,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:53,960 INFO L225 Difference]: With dead ends: 2354 [2022-01-18 05:28:53,960 INFO L226 Difference]: Without dead ends: 2342 [2022-01-18 05:28:53,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 31 SyntacticMatches, 11 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=579, Invalid=5121, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 05:28:53,962 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 391 mSDsluCounter, 2172 mSDsCounter, 0 mSdLazyCounter, 2258 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 4193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1867 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:53,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 234 Invalid, 4193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2258 Invalid, 0 Unknown, 1867 Unchecked, 0.9s Time] [2022-01-18 05:28:53,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2022-01-18 05:28:53,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1445. [2022-01-18 05:28:53,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 3.335872576177285) internal successors, (4817), 1444 states have internal predecessors, (4817), 0 states have call successors, (0), 0 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 05:28:53,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 4817 transitions. [2022-01-18 05:28:53,982 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 4817 transitions. Word has length 24 [2022-01-18 05:28:53,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:53,983 INFO L470 AbstractCegarLoop]: Abstraction has 1445 states and 4817 transitions. [2022-01-18 05:28:53,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:28:53,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 4817 transitions. [2022-01-18 05:28:53,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:28:53,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:53,984 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] [2022-01-18 05:28:53,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-01-18 05:28:54,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:54,185 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:28:54,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:54,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1925562905, now seen corresponding path program 64 times [2022-01-18 05:28:54,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:54,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413396750] [2022-01-18 05:28:54,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:54,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:54,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:54,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:54,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413396750] [2022-01-18 05:28:54,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413396750] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:54,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889536097] [2022-01-18 05:28:54,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:28:54,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:54,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:54,412 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:28:54,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-18 05:28:54,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:28:54,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:54,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:28:54,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:54,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:54,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:54,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:54,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:54,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:28:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:54,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:54,947 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:28:54,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:28:54,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:54,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:55,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:55,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:55,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:28:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:55,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889536097] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:55,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:55,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:28:55,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434983512] [2022-01-18 05:28:55,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:55,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:28:55,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:55,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:28:55,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:28:55,016 INFO L87 Difference]: Start difference. First operand 1445 states and 4817 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:56,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:56,524 INFO L93 Difference]: Finished difference Result 2494 states and 8183 transitions. [2022-01-18 05:28:56,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 05:28:56,525 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:28:56,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:56,529 INFO L225 Difference]: With dead ends: 2494 [2022-01-18 05:28:56,529 INFO L226 Difference]: Without dead ends: 2487 [2022-01-18 05:28:56,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=287, Invalid=2163, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 05:28:56,529 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 201 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 1860 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 500 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:56,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 174 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1860 Invalid, 0 Unknown, 500 Unchecked, 0.7s Time] [2022-01-18 05:28:56,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2022-01-18 05:28:56,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 1474. [2022-01-18 05:28:56,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 3.3346911065852) internal successors, (4912), 1473 states have internal predecessors, (4912), 0 states have call successors, (0), 0 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 05:28:56,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 4912 transitions. [2022-01-18 05:28:56,550 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 4912 transitions. Word has length 24 [2022-01-18 05:28:56,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:56,550 INFO L470 AbstractCegarLoop]: Abstraction has 1474 states and 4912 transitions. [2022-01-18 05:28:56,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:56,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 4912 transitions. [2022-01-18 05:28:56,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:28:56,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:56,552 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] [2022-01-18 05:28:56,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-01-18 05:28:56,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-01-18 05:28:56,753 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:28:56,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:56,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1055124371, now seen corresponding path program 65 times [2022-01-18 05:28:56,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:56,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431001521] [2022-01-18 05:28:56,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:56,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:56,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:56,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:56,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431001521] [2022-01-18 05:28:56,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431001521] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:56,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708598335] [2022-01-18 05:28:56,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:28:56,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:56,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:56,968 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:28:56,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-18 05:28:56,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:28:56,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:56,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:28:56,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:28:57,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:57,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:57,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:57,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:57,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:28:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:57,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:28:57,530 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:28:57,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:28:57,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:57,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:28:57,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:57,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:28:57,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:28:57,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:57,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708598335] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:28:57,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:28:57,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:28:57,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22007894] [2022-01-18 05:28:57,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:28:57,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:28:57,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:28:57,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:28:57,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:28:57,588 INFO L87 Difference]: Start difference. First operand 1474 states and 4912 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:59,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:28:59,248 INFO L93 Difference]: Finished difference Result 2507 states and 8478 transitions. [2022-01-18 05:28:59,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 05:28:59,248 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:28:59,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:28:59,253 INFO L225 Difference]: With dead ends: 2507 [2022-01-18 05:28:59,253 INFO L226 Difference]: Without dead ends: 2500 [2022-01-18 05:28:59,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=227, Invalid=2029, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 05:28:59,253 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 127 mSDsluCounter, 1308 mSDsCounter, 0 mSdLazyCounter, 2248 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 3016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 733 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:28:59,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 124 Invalid, 3016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2248 Invalid, 0 Unknown, 733 Unchecked, 0.8s Time] [2022-01-18 05:28:59,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2022-01-18 05:28:59,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 1492. [2022-01-18 05:28:59,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1491 states have (on average 3.3333333333333335) internal successors, (4970), 1491 states have internal predecessors, (4970), 0 states have call successors, (0), 0 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 05:28:59,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 4970 transitions. [2022-01-18 05:28:59,274 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 4970 transitions. Word has length 24 [2022-01-18 05:28:59,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:28:59,274 INFO L470 AbstractCegarLoop]: Abstraction has 1492 states and 4970 transitions. [2022-01-18 05:28:59,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:28:59,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 4970 transitions. [2022-01-18 05:28:59,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:28:59,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:28:59,276 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] [2022-01-18 05:28:59,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-01-18 05:28:59,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-01-18 05:28:59,476 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:28:59,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:28:59,476 INFO L85 PathProgramCache]: Analyzing trace with hash -2135632231, now seen corresponding path program 66 times [2022-01-18 05:28:59,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:28:59,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179226891] [2022-01-18 05:28:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:28:59,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:28:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:28:59,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:28:59,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:28:59,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179226891] [2022-01-18 05:28:59,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179226891] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:28:59,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345351649] [2022-01-18 05:28:59,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:28:59,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:28:59,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:28:59,693 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:28:59,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-18 05:28:59,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:28:59,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:28:59,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 05:28:59,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:00,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:00,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:00,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:00,114 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:29:00,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 43 [2022-01-18 05:29:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:00,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:00,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:00,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:00,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:00,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:00,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 7 [2022-01-18 05:29:00,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:00,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345351649] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:00,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:00,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-01-18 05:29:00,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904994420] [2022-01-18 05:29:00,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:00,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:29:00,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:00,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:29:00,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:29:00,953 INFO L87 Difference]: Start difference. First operand 1492 states and 4970 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:29:02,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:02,430 INFO L93 Difference]: Finished difference Result 2317 states and 7712 transitions. [2022-01-18 05:29:02,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 05:29:02,430 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:29:02,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:02,435 INFO L225 Difference]: With dead ends: 2317 [2022-01-18 05:29:02,435 INFO L226 Difference]: Without dead ends: 2311 [2022-01-18 05:29:02,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=282, Invalid=2688, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 05:29:02,435 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 147 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 700 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:02,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 163 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1183 Invalid, 0 Unknown, 700 Unchecked, 0.5s Time] [2022-01-18 05:29:02,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2022-01-18 05:29:02,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 1503. [2022-01-18 05:29:02,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 3.3302263648468706) internal successors, (5002), 1502 states have internal predecessors, (5002), 0 states have call successors, (0), 0 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 05:29:02,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 5002 transitions. [2022-01-18 05:29:02,457 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 5002 transitions. Word has length 24 [2022-01-18 05:29:02,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:02,457 INFO L470 AbstractCegarLoop]: Abstraction has 1503 states and 5002 transitions. [2022-01-18 05:29:02,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:29:02,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 5002 transitions. [2022-01-18 05:29:02,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:29:02,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:02,459 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] [2022-01-18 05:29:02,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-01-18 05:29:02,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:02,659 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:29:02,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:02,660 INFO L85 PathProgramCache]: Analyzing trace with hash 658794093, now seen corresponding path program 67 times [2022-01-18 05:29:02,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:02,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141655122] [2022-01-18 05:29:02,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:02,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:02,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:02,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141655122] [2022-01-18 05:29:02,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141655122] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:02,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548353343] [2022-01-18 05:29:02,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:29:02,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:02,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:02,871 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:29:02,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-18 05:29:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:02,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:29:02,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:03,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:03,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:03,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:03,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:03,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:29:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:03,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:03,392 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:29:03,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:29:03,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:03,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:03,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:03,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:03,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:29:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:03,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548353343] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:03,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:03,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:29:03,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427625185] [2022-01-18 05:29:03,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:03,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:29:03,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:03,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:29:03,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:29:03,462 INFO L87 Difference]: Start difference. First operand 1503 states and 5002 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:04,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:04,582 INFO L93 Difference]: Finished difference Result 1956 states and 6536 transitions. [2022-01-18 05:29:04,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 05:29:04,582 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:29:04,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:04,585 INFO L225 Difference]: With dead ends: 1956 [2022-01-18 05:29:04,585 INFO L226 Difference]: Without dead ends: 1946 [2022-01-18 05:29:04,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=188, Invalid=1704, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 05:29:04,585 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 135 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 358 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:04,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 78 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1275 Invalid, 0 Unknown, 358 Unchecked, 0.5s Time] [2022-01-18 05:29:04,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2022-01-18 05:29:04,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1484. [2022-01-18 05:29:04,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 3.3391773432231964) internal successors, (4952), 1483 states have internal predecessors, (4952), 0 states have call successors, (0), 0 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 05:29:04,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 4952 transitions. [2022-01-18 05:29:04,604 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 4952 transitions. Word has length 24 [2022-01-18 05:29:04,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:04,604 INFO L470 AbstractCegarLoop]: Abstraction has 1484 states and 4952 transitions. [2022-01-18 05:29:04,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:04,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 4952 transitions. [2022-01-18 05:29:04,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:29:04,606 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:04,606 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] [2022-01-18 05:29:04,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-01-18 05:29:04,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:04,807 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:29:04,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:04,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1996948091, now seen corresponding path program 68 times [2022-01-18 05:29:04,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:04,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234513921] [2022-01-18 05:29:04,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:04,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:05,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:05,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234513921] [2022-01-18 05:29:05,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234513921] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:05,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197212212] [2022-01-18 05:29:05,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:29:05,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:05,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:05,015 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:29:05,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-18 05:29:05,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:29:05,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:05,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:29:05,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:05,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:05,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:05,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:05,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:29:05,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 05:29:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:05,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:05,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:05,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:05,984 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:29:05,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:29:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:06,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197212212] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:06,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:06,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:29:06,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227741544] [2022-01-18 05:29:06,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:06,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:29:06,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:06,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:29:06,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:29:06,102 INFO L87 Difference]: Start difference. First operand 1484 states and 4952 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:29:08,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:08,889 INFO L93 Difference]: Finished difference Result 3982 states and 14201 transitions. [2022-01-18 05:29:08,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 05:29:08,889 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:29:08,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:08,896 INFO L225 Difference]: With dead ends: 3982 [2022-01-18 05:29:08,896 INFO L226 Difference]: Without dead ends: 3971 [2022-01-18 05:29:08,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1813 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=747, Invalid=5733, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 05:29:08,897 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 211 mSDsluCounter, 1041 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 2134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1347 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:08,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 166 Invalid, 2134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 739 Invalid, 0 Unknown, 1347 Unchecked, 0.3s Time] [2022-01-18 05:29:08,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2022-01-18 05:29:08,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 1505. [2022-01-18 05:29:08,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 3.3397606382978724) internal successors, (5023), 1504 states have internal predecessors, (5023), 0 states have call successors, (0), 0 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 05:29:08,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 5023 transitions. [2022-01-18 05:29:08,929 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 5023 transitions. Word has length 24 [2022-01-18 05:29:08,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:08,929 INFO L470 AbstractCegarLoop]: Abstraction has 1505 states and 5023 transitions. [2022-01-18 05:29:08,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:29:08,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 5023 transitions. [2022-01-18 05:29:08,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:29:08,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:08,931 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] [2022-01-18 05:29:08,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-01-18 05:29:09,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2022-01-18 05:29:09,131 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:29:09,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:09,132 INFO L85 PathProgramCache]: Analyzing trace with hash -682668071, now seen corresponding path program 69 times [2022-01-18 05:29:09,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:09,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389878306] [2022-01-18 05:29:09,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:09,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:09,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:09,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389878306] [2022-01-18 05:29:09,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389878306] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:09,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462629865] [2022-01-18 05:29:09,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:29:09,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:09,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:09,347 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:29:09,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-18 05:29:09,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:29:09,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:09,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:29:09,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:09,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:09,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:09,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:09,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:09,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 05:29:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:09,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:10,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:10,068 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:29:10,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-01-18 05:29:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:10,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462629865] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:10,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:10,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:29:10,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926746470] [2022-01-18 05:29:10,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:10,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:29:10,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:10,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:29:10,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:29:10,164 INFO L87 Difference]: Start difference. First operand 1505 states and 5023 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:11,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:11,130 INFO L93 Difference]: Finished difference Result 1914 states and 6410 transitions. [2022-01-18 05:29:11,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 05:29:11,130 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:29:11,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:11,134 INFO L225 Difference]: With dead ends: 1914 [2022-01-18 05:29:11,134 INFO L226 Difference]: Without dead ends: 1909 [2022-01-18 05:29:11,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=196, Invalid=1696, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 05:29:11,134 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 58 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:11,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 104 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1242 Invalid, 0 Unknown, 190 Unchecked, 0.5s Time] [2022-01-18 05:29:11,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2022-01-18 05:29:11,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1506. [2022-01-18 05:29:11,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 3.338870431893688) internal successors, (5025), 1505 states have internal predecessors, (5025), 0 states have call successors, (0), 0 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 05:29:11,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 5025 transitions. [2022-01-18 05:29:11,152 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 5025 transitions. Word has length 24 [2022-01-18 05:29:11,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:11,152 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 5025 transitions. [2022-01-18 05:29:11,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:11,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 5025 transitions. [2022-01-18 05:29:11,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:29:11,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:11,154 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] [2022-01-18 05:29:11,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-01-18 05:29:11,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:11,355 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:29:11,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:11,355 INFO L85 PathProgramCache]: Analyzing trace with hash 2004616198, now seen corresponding path program 2 times [2022-01-18 05:29:11,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:11,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468976740] [2022-01-18 05:29:11,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:11,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:11,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:11,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:11,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468976740] [2022-01-18 05:29:11,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468976740] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:11,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956476232] [2022-01-18 05:29:11,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:29:11,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:11,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:11,568 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:29:11,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-18 05:29:11,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:29:11,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:11,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:29:11,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:11,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:11,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:11,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:11,883 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:29:11,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 05:29:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:12,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:12,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:12,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:12,518 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:29:12,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:29:12,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:12,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956476232] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:12,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:12,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:29:12,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247812412] [2022-01-18 05:29:12,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:12,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:29:12,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:12,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:29:12,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:29:12,635 INFO L87 Difference]: Start difference. First operand 1506 states and 5025 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:29:14,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:14,750 INFO L93 Difference]: Finished difference Result 4648 states and 16987 transitions. [2022-01-18 05:29:14,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 05:29:14,750 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:29:14,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:14,759 INFO L225 Difference]: With dead ends: 4648 [2022-01-18 05:29:14,759 INFO L226 Difference]: Without dead ends: 4646 [2022-01-18 05:29:14,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=738, Invalid=3818, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 05:29:14,760 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 163 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 2470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1502 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:14,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 198 Invalid, 2470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 919 Invalid, 0 Unknown, 1502 Unchecked, 0.4s Time] [2022-01-18 05:29:14,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2022-01-18 05:29:14,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 1557. [2022-01-18 05:29:14,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1556 states have (on average 3.3553984575835476) internal successors, (5221), 1556 states have internal predecessors, (5221), 0 states have call successors, (0), 0 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 05:29:14,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 5221 transitions. [2022-01-18 05:29:14,795 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 5221 transitions. Word has length 24 [2022-01-18 05:29:14,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:14,796 INFO L470 AbstractCegarLoop]: Abstraction has 1557 states and 5221 transitions. [2022-01-18 05:29:14,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:29:14,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 5221 transitions. [2022-01-18 05:29:14,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:29:14,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:14,798 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] [2022-01-18 05:29:14,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-01-18 05:29:14,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-01-18 05:29:14,998 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:29:14,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:14,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1429097984, now seen corresponding path program 3 times [2022-01-18 05:29:14,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:14,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895181559] [2022-01-18 05:29:14,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:14,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:15,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:15,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:15,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895181559] [2022-01-18 05:29:15,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895181559] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:15,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204523699] [2022-01-18 05:29:15,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:29:15,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:15,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:15,213 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:29:15,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-18 05:29:15,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:29:15,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:15,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:29:15,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:15,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:15,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:15,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:15,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:15,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 05:29:15,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:15,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:16,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:16,044 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:29:16,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-01-18 05:29:16,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:16,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204523699] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:16,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:16,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-18 05:29:16,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240992139] [2022-01-18 05:29:16,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:16,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:29:16,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:16,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:29:16,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:29:16,138 INFO L87 Difference]: Start difference. First operand 1557 states and 5221 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:29:18,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:18,454 INFO L93 Difference]: Finished difference Result 2310 states and 7511 transitions. [2022-01-18 05:29:18,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 05:29:18,455 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:29:18,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:18,459 INFO L225 Difference]: With dead ends: 2310 [2022-01-18 05:29:18,459 INFO L226 Difference]: Without dead ends: 2298 [2022-01-18 05:29:18,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=420, Invalid=3740, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 05:29:18,459 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 265 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 3316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 875 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:18,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 242 Invalid, 3316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2338 Invalid, 0 Unknown, 875 Unchecked, 0.9s Time] [2022-01-18 05:29:18,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2022-01-18 05:29:18,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 1566. [2022-01-18 05:29:18,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 3.3501597444089457) internal successors, (5243), 1565 states have internal predecessors, (5243), 0 states have call successors, (0), 0 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 05:29:18,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 5243 transitions. [2022-01-18 05:29:18,481 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 5243 transitions. Word has length 24 [2022-01-18 05:29:18,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:18,481 INFO L470 AbstractCegarLoop]: Abstraction has 1566 states and 5243 transitions. [2022-01-18 05:29:18,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:29:18,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 5243 transitions. [2022-01-18 05:29:18,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:29:18,484 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:18,484 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] [2022-01-18 05:29:18,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-01-18 05:29:18,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-01-18 05:29:18,684 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:29:18,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:18,684 INFO L85 PathProgramCache]: Analyzing trace with hash -976071078, now seen corresponding path program 4 times [2022-01-18 05:29:18,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:18,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545469502] [2022-01-18 05:29:18,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:18,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:18,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:18,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545469502] [2022-01-18 05:29:18,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545469502] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:18,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529036805] [2022-01-18 05:29:18,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:29:18,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:18,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:18,919 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:29:18,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-18 05:29:18,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:29:18,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:18,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:29:18,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:19,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:19,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:19,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:19,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:19,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:29:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:19,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:19,456 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:29:19,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:29:19,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:19,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:19,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:19,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:19,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:29:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:19,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529036805] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:19,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:19,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:29:19,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477140172] [2022-01-18 05:29:19,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:19,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:29:19,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:19,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:29:19,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:29:19,520 INFO L87 Difference]: Start difference. First operand 1566 states and 5243 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:20,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:20,685 INFO L93 Difference]: Finished difference Result 2263 states and 7642 transitions. [2022-01-18 05:29:20,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:29:20,685 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:29:20,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:20,689 INFO L225 Difference]: With dead ends: 2263 [2022-01-18 05:29:20,689 INFO L226 Difference]: Without dead ends: 2256 [2022-01-18 05:29:20,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 05:29:20,690 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 157 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 659 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:20,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 107 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1401 Invalid, 0 Unknown, 659 Unchecked, 0.5s Time] [2022-01-18 05:29:20,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-01-18 05:29:20,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 1559. [2022-01-18 05:29:20,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1559 states, 1558 states have (on average 3.3581514762516047) internal successors, (5232), 1558 states have internal predecessors, (5232), 0 states have call successors, (0), 0 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 05:29:20,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 5232 transitions. [2022-01-18 05:29:20,726 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 5232 transitions. Word has length 24 [2022-01-18 05:29:20,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:20,726 INFO L470 AbstractCegarLoop]: Abstraction has 1559 states and 5232 transitions. [2022-01-18 05:29:20,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:20,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 5232 transitions. [2022-01-18 05:29:20,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:29:20,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:20,728 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] [2022-01-18 05:29:20,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-01-18 05:29:20,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:20,928 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:29:20,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:20,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1659655765, now seen corresponding path program 70 times [2022-01-18 05:29:20,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:20,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759756556] [2022-01-18 05:29:20,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:20,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:21,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:21,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759756556] [2022-01-18 05:29:21,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759756556] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:21,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130778995] [2022-01-18 05:29:21,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:29:21,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:21,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:21,150 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:29:21,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-18 05:29:21,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:29:21,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:21,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:29:21,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:21,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:21,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:21,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:21,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:21,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:29:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:21,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:21,682 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:29:21,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:29:21,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:21,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:21,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:21,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:21,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:29:21,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:21,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130778995] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:21,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:21,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:29:21,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910565626] [2022-01-18 05:29:21,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:21,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:29:21,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:21,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:29:21,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:29:21,750 INFO L87 Difference]: Start difference. First operand 1559 states and 5232 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:22,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:22,925 INFO L93 Difference]: Finished difference Result 2081 states and 6948 transitions. [2022-01-18 05:29:22,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:29:22,925 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:29:22,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:22,929 INFO L225 Difference]: With dead ends: 2081 [2022-01-18 05:29:22,929 INFO L226 Difference]: Without dead ends: 2074 [2022-01-18 05:29:22,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 05:29:22,929 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 123 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 500 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:22,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 101 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1404 Invalid, 0 Unknown, 500 Unchecked, 0.5s Time] [2022-01-18 05:29:22,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2022-01-18 05:29:22,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1560. [2022-01-18 05:29:22,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1559 states have (on average 3.3598460551635663) internal successors, (5238), 1559 states have internal predecessors, (5238), 0 states have call successors, (0), 0 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 05:29:22,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 5238 transitions. [2022-01-18 05:29:22,949 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 5238 transitions. Word has length 24 [2022-01-18 05:29:22,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:22,949 INFO L470 AbstractCegarLoop]: Abstraction has 1560 states and 5238 transitions. [2022-01-18 05:29:22,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:22,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 5238 transitions. [2022-01-18 05:29:22,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:29:22,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:22,952 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] [2022-01-18 05:29:22,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-01-18 05:29:23,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-01-18 05:29:23,152 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:29:23,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:23,152 INFO L85 PathProgramCache]: Analyzing trace with hash 579147905, now seen corresponding path program 71 times [2022-01-18 05:29:23,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:23,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94246366] [2022-01-18 05:29:23,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:23,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:23,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:23,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:23,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94246366] [2022-01-18 05:29:23,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94246366] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:23,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399396901] [2022-01-18 05:29:23,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:29:23,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:23,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:23,375 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:29:23,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-18 05:29:23,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:29:23,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:23,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:29:23,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:23,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:23,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:23,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:23,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:23,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:29:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:23,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:23,911 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:29:23,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:29:23,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:23,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:23,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:23,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:23,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:29:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:23,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399396901] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:23,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:23,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:29:23,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706095406] [2022-01-18 05:29:23,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:23,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:29:23,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:23,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:29:23,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:29:23,992 INFO L87 Difference]: Start difference. First operand 1560 states and 5238 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:25,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:25,490 INFO L93 Difference]: Finished difference Result 2500 states and 8502 transitions. [2022-01-18 05:29:25,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 05:29:25,490 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:29:25,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:25,494 INFO L225 Difference]: With dead ends: 2500 [2022-01-18 05:29:25,495 INFO L226 Difference]: Without dead ends: 2490 [2022-01-18 05:29:25,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=218, Invalid=2038, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 05:29:25,495 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 157 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 1705 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 697 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:25,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 115 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1705 Invalid, 0 Unknown, 697 Unchecked, 0.8s Time] [2022-01-18 05:29:25,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2022-01-18 05:29:25,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 1558. [2022-01-18 05:29:25,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1558 states, 1557 states have (on average 3.3538856775850996) internal successors, (5222), 1557 states have internal predecessors, (5222), 0 states have call successors, (0), 0 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 05:29:25,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 5222 transitions. [2022-01-18 05:29:25,519 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 5222 transitions. Word has length 24 [2022-01-18 05:29:25,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:25,519 INFO L470 AbstractCegarLoop]: Abstraction has 1558 states and 5222 transitions. [2022-01-18 05:29:25,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:25,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 5222 transitions. [2022-01-18 05:29:25,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:29:25,521 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:25,521 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] [2022-01-18 05:29:25,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-01-18 05:29:25,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-01-18 05:29:25,724 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:29:25,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:25,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1192444841, now seen corresponding path program 72 times [2022-01-18 05:29:25,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:25,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082009275] [2022-01-18 05:29:25,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:25,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:25,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:25,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:25,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082009275] [2022-01-18 05:29:25,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082009275] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:25,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33614900] [2022-01-18 05:29:25,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:29:25,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:25,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:25,933 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:29:25,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-18 05:29:25,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:29:25,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:25,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 05:29:25,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:26,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:26,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:26,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:26,444 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:29:26,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 43 [2022-01-18 05:29:26,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:26,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:27,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:27,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:27,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:27,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:27,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 7 [2022-01-18 05:29:27,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:27,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33614900] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:27,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:27,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-01-18 05:29:27,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560882167] [2022-01-18 05:29:27,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:27,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:29:27,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:27,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:29:27,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:29:27,190 INFO L87 Difference]: Start difference. First operand 1558 states and 5222 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:28,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:28,575 INFO L93 Difference]: Finished difference Result 2404 states and 7972 transitions. [2022-01-18 05:29:28,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 05:29:28,575 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:29:28,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:28,579 INFO L225 Difference]: With dead ends: 2404 [2022-01-18 05:29:28,580 INFO L226 Difference]: Without dead ends: 2394 [2022-01-18 05:29:28,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=301, Invalid=3121, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 05:29:28,582 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 193 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 2404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1294 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:28,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 215 Invalid, 2404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1083 Invalid, 0 Unknown, 1294 Unchecked, 0.4s Time] [2022-01-18 05:29:28,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2394 states. [2022-01-18 05:29:28,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2394 to 1577. [2022-01-18 05:29:28,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1576 states have (on average 3.350253807106599) internal successors, (5280), 1576 states have internal predecessors, (5280), 0 states have call successors, (0), 0 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 05:29:28,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 5280 transitions. [2022-01-18 05:29:28,607 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 5280 transitions. Word has length 24 [2022-01-18 05:29:28,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:28,607 INFO L470 AbstractCegarLoop]: Abstraction has 1577 states and 5280 transitions. [2022-01-18 05:29:28,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:28,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 5280 transitions. [2022-01-18 05:29:28,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:29:28,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:28,609 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] [2022-01-18 05:29:28,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-01-18 05:29:28,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:28,819 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:29:28,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:28,820 INFO L85 PathProgramCache]: Analyzing trace with hash -604506518, now seen corresponding path program 10 times [2022-01-18 05:29:28,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:28,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379074927] [2022-01-18 05:29:28,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:28,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:29,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:29,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379074927] [2022-01-18 05:29:29,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379074927] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:29,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241935487] [2022-01-18 05:29:29,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:29:29,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:29,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:29,013 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:29:29,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-18 05:29:29,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:29:29,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:29,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:29:29,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:29,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:29,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:29,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:29,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:29,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:29:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:29,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:29,571 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:29:29,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:29:29,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:29,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:29,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:29,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:29,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:29:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:29,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241935487] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:29,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:29,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:29:29,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842995129] [2022-01-18 05:29:29,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:29,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:29:29,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:29,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:29:29,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:29:29,630 INFO L87 Difference]: Start difference. First operand 1577 states and 5280 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:31,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:31,512 INFO L93 Difference]: Finished difference Result 2733 states and 9077 transitions. [2022-01-18 05:29:31,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 05:29:31,512 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:29:31,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:31,517 INFO L225 Difference]: With dead ends: 2733 [2022-01-18 05:29:31,518 INFO L226 Difference]: Without dead ends: 2726 [2022-01-18 05:29:31,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=302, Invalid=2890, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 05:29:31,518 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 231 mSDsluCounter, 1910 mSDsCounter, 0 mSdLazyCounter, 2607 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 3949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1306 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:31,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 207 Invalid, 3949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2607 Invalid, 0 Unknown, 1306 Unchecked, 0.9s Time] [2022-01-18 05:29:31,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2022-01-18 05:29:31,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 1484. [2022-01-18 05:29:31,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 3.390424814565071) internal successors, (5028), 1483 states have internal predecessors, (5028), 0 states have call successors, (0), 0 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 05:29:31,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 5028 transitions. [2022-01-18 05:29:31,544 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 5028 transitions. Word has length 24 [2022-01-18 05:29:31,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:31,544 INFO L470 AbstractCegarLoop]: Abstraction has 1484 states and 5028 transitions. [2022-01-18 05:29:31,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:31,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 5028 transitions. [2022-01-18 05:29:31,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:29:31,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:31,547 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] [2022-01-18 05:29:31,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-01-18 05:29:31,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:31,760 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:29:31,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:31,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1535362685, now seen corresponding path program 73 times [2022-01-18 05:29:31,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:31,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917681290] [2022-01-18 05:29:31,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:31,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:31,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:31,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:31,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:31,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917681290] [2022-01-18 05:29:31,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917681290] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:31,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372828925] [2022-01-18 05:29:31,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:29:31,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:31,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:31,986 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:29:31,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-18 05:29:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:32,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:29:32,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:32,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:32,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:32,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:32,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:32,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:29:32,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:32,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:32,509 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:29:32,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:29:32,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:32,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:32,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:32,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:32,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:29:32,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:32,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372828925] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:32,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:32,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:29:32,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214157328] [2022-01-18 05:29:32,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:32,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:29:32,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:32,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:29:32,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:29:32,575 INFO L87 Difference]: Start difference. First operand 1484 states and 5028 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:35,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:35,911 INFO L93 Difference]: Finished difference Result 4104 states and 14266 transitions. [2022-01-18 05:29:35,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-18 05:29:35,911 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:29:35,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:35,919 INFO L225 Difference]: With dead ends: 4104 [2022-01-18 05:29:35,919 INFO L226 Difference]: Without dead ends: 4097 [2022-01-18 05:29:35,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2067 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=874, Invalid=6266, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 05:29:35,919 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 247 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 2538 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 3468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 824 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:35,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 158 Invalid, 3468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2538 Invalid, 0 Unknown, 824 Unchecked, 1.0s Time] [2022-01-18 05:29:35,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4097 states. [2022-01-18 05:29:35,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4097 to 1460. [2022-01-18 05:29:35,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 3.3927347498286498) internal successors, (4950), 1459 states have internal predecessors, (4950), 0 states have call successors, (0), 0 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 05:29:35,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 4950 transitions. [2022-01-18 05:29:35,954 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 4950 transitions. Word has length 24 [2022-01-18 05:29:35,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:35,954 INFO L470 AbstractCegarLoop]: Abstraction has 1460 states and 4950 transitions. [2022-01-18 05:29:35,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:35,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 4950 transitions. [2022-01-18 05:29:35,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:29:35,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:35,956 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] [2022-01-18 05:29:35,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-01-18 05:29:36,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-01-18 05:29:36,172 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:29:36,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:36,172 INFO L85 PathProgramCache]: Analyzing trace with hash -521330513, now seen corresponding path program 74 times [2022-01-18 05:29:36,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:36,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461158774] [2022-01-18 05:29:36,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:36,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:36,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:36,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461158774] [2022-01-18 05:29:36,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461158774] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:36,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292234642] [2022-01-18 05:29:36,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:29:36,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:36,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:36,388 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:29:36,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-18 05:29:36,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:29:36,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:36,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:29:36,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:36,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:36,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:36,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:36,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:29:36,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 05:29:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:36,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:37,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:37,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:37,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:29:37,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:29:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:37,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292234642] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:37,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:37,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:29:37,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052354861] [2022-01-18 05:29:37,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:37,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:29:37,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:37,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:29:37,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:29:37,440 INFO L87 Difference]: Start difference. First operand 1460 states and 4950 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:29:39,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:39,569 INFO L93 Difference]: Finished difference Result 3094 states and 11094 transitions. [2022-01-18 05:29:39,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 05:29:39,570 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:29:39,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:39,575 INFO L225 Difference]: With dead ends: 3094 [2022-01-18 05:29:39,575 INFO L226 Difference]: Without dead ends: 3084 [2022-01-18 05:29:39,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=600, Invalid=4370, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 05:29:39,576 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 204 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1359 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:39,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 156 Invalid, 2154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 749 Invalid, 0 Unknown, 1359 Unchecked, 0.3s Time] [2022-01-18 05:29:39,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2022-01-18 05:29:39,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 1504. [2022-01-18 05:29:39,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1503 states have (on average 3.4105123087159015) internal successors, (5126), 1503 states have internal predecessors, (5126), 0 states have call successors, (0), 0 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 05:29:39,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 5126 transitions. [2022-01-18 05:29:39,602 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 5126 transitions. Word has length 24 [2022-01-18 05:29:39,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:39,602 INFO L470 AbstractCegarLoop]: Abstraction has 1504 states and 5126 transitions. [2022-01-18 05:29:39,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:29:39,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 5126 transitions. [2022-01-18 05:29:39,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:29:39,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:39,604 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] [2022-01-18 05:29:39,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-01-18 05:29:39,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:39,805 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:29:39,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:39,805 INFO L85 PathProgramCache]: Analyzing trace with hash 792949507, now seen corresponding path program 75 times [2022-01-18 05:29:39,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:39,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379471088] [2022-01-18 05:29:39,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:39,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:40,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:40,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:40,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379471088] [2022-01-18 05:29:40,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379471088] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:40,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238603859] [2022-01-18 05:29:40,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:29:40,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:40,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:40,022 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:29:40,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-18 05:29:40,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:29:40,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:40,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:29:40,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:40,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:40,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:40,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:40,304 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:29:40,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 05:29:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:40,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:40,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:40,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:40,973 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:29:40,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:29:41,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:41,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238603859] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:41,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:41,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:29:41,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110526160] [2022-01-18 05:29:41,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:41,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:29:41,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:41,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:29:41,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:29:41,085 INFO L87 Difference]: Start difference. First operand 1504 states and 5126 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:29:44,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:44,042 INFO L93 Difference]: Finished difference Result 3055 states and 10444 transitions. [2022-01-18 05:29:44,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 05:29:44,042 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:29:44,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:44,048 INFO L225 Difference]: With dead ends: 3055 [2022-01-18 05:29:44,048 INFO L226 Difference]: Without dead ends: 3042 [2022-01-18 05:29:44,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 33 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=565, Invalid=4127, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 05:29:44,048 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 320 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 3667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2509 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:44,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 176 Invalid, 3667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1102 Invalid, 0 Unknown, 2509 Unchecked, 0.5s Time] [2022-01-18 05:29:44,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2022-01-18 05:29:44,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 1552. [2022-01-18 05:29:44,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 3.4165054803352675) internal successors, (5299), 1551 states have internal predecessors, (5299), 0 states have call successors, (0), 0 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 05:29:44,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 5299 transitions. [2022-01-18 05:29:44,075 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 5299 transitions. Word has length 24 [2022-01-18 05:29:44,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:44,076 INFO L470 AbstractCegarLoop]: Abstraction has 1552 states and 5299 transitions. [2022-01-18 05:29:44,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:29:44,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 5299 transitions. [2022-01-18 05:29:44,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:29:44,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:44,078 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] [2022-01-18 05:29:44,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-01-18 05:29:44,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:44,278 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:29:44,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:44,278 INFO L85 PathProgramCache]: Analyzing trace with hash -239064859, now seen corresponding path program 76 times [2022-01-18 05:29:44,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:44,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671787226] [2022-01-18 05:29:44,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:44,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:44,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:44,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671787226] [2022-01-18 05:29:44,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671787226] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:44,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204299845] [2022-01-18 05:29:44,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:29:44,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:44,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:44,501 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:29:44,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-18 05:29:44,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:29:44,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:44,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:29:44,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:44,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:44,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:44,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:44,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:44,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:29:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:44,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:45,026 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:29:45,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:29:45,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:45,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:45,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:45,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:45,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:29:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:45,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204299845] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:45,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:45,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:29:45,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908441790] [2022-01-18 05:29:45,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:45,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:29:45,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:45,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:29:45,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:29:45,092 INFO L87 Difference]: Start difference. First operand 1552 states and 5299 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:47,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:47,350 INFO L93 Difference]: Finished difference Result 3034 states and 10291 transitions. [2022-01-18 05:29:47,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 05:29:47,350 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:29:47,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:47,355 INFO L225 Difference]: With dead ends: 3034 [2022-01-18 05:29:47,355 INFO L226 Difference]: Without dead ends: 3026 [2022-01-18 05:29:47,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=440, Invalid=3466, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 05:29:47,356 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 184 mSDsluCounter, 1221 mSDsCounter, 0 mSdLazyCounter, 2181 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 2181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 339 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:47,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 174 Invalid, 2662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 2181 Invalid, 0 Unknown, 339 Unchecked, 0.9s Time] [2022-01-18 05:29:47,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2022-01-18 05:29:47,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 1563. [2022-01-18 05:29:47,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1562 states have (on average 3.4161331626120357) internal successors, (5336), 1562 states have internal predecessors, (5336), 0 states have call successors, (0), 0 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 05:29:47,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 5336 transitions. [2022-01-18 05:29:47,383 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 5336 transitions. Word has length 24 [2022-01-18 05:29:47,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:47,383 INFO L470 AbstractCegarLoop]: Abstraction has 1563 states and 5336 transitions. [2022-01-18 05:29:47,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:47,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 5336 transitions. [2022-01-18 05:29:47,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:29:47,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:47,385 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] [2022-01-18 05:29:47,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-01-18 05:29:47,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:47,585 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:29:47,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:47,586 INFO L85 PathProgramCache]: Analyzing trace with hash -5292699, now seen corresponding path program 77 times [2022-01-18 05:29:47,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:47,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386391030] [2022-01-18 05:29:47,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:47,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:47,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:47,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386391030] [2022-01-18 05:29:47,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386391030] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:47,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717153365] [2022-01-18 05:29:47,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:29:47,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:47,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:47,815 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:29:47,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-01-18 05:29:47,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:29:47,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:47,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:29:47,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:48,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:48,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:48,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:48,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:48,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:29:48,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:48,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:48,355 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:29:48,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:29:48,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:48,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:48,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:48,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:48,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:29:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:48,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717153365] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:48,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:48,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:29:48,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356500329] [2022-01-18 05:29:48,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:48,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:29:48,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:48,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:29:48,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:29:48,413 INFO L87 Difference]: Start difference. First operand 1563 states and 5336 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:50,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:50,009 INFO L93 Difference]: Finished difference Result 2326 states and 7964 transitions. [2022-01-18 05:29:50,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 05:29:50,009 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:29:50,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:50,013 INFO L225 Difference]: With dead ends: 2326 [2022-01-18 05:29:50,013 INFO L226 Difference]: Without dead ends: 2318 [2022-01-18 05:29:50,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=253, Invalid=2609, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 05:29:50,014 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 149 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 1743 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 2731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 952 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:50,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 106 Invalid, 2731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1743 Invalid, 0 Unknown, 952 Unchecked, 0.7s Time] [2022-01-18 05:29:50,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2022-01-18 05:29:50,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 1564. [2022-01-18 05:29:50,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 3.417786308381318) internal successors, (5342), 1563 states have internal predecessors, (5342), 0 states have call successors, (0), 0 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 05:29:50,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 5342 transitions. [2022-01-18 05:29:50,036 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 5342 transitions. Word has length 24 [2022-01-18 05:29:50,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:50,036 INFO L470 AbstractCegarLoop]: Abstraction has 1564 states and 5342 transitions. [2022-01-18 05:29:50,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:50,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 5342 transitions. [2022-01-18 05:29:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:29:50,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:50,038 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] [2022-01-18 05:29:50,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-01-18 05:29:50,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:50,239 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:29:50,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:50,240 INFO L85 PathProgramCache]: Analyzing trace with hash -109982140, now seen corresponding path program 5 times [2022-01-18 05:29:50,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:50,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215767480] [2022-01-18 05:29:50,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:50,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:50,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:50,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:50,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:50,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215767480] [2022-01-18 05:29:50,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215767480] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:50,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280512102] [2022-01-18 05:29:50,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:29:50,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:50,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:50,450 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:29:50,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-01-18 05:29:50,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:29:50,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:50,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:29:50,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:50,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:50,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:50,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:50,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:50,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:29:50,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:50,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:50,995 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:29:50,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:29:51,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:51,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:51,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:51,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:51,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:29:51,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:51,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280512102] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:51,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:51,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:29:51,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970130872] [2022-01-18 05:29:51,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:51,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:29:51,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:51,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:29:51,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:29:51,058 INFO L87 Difference]: Start difference. First operand 1564 states and 5342 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:54,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:54,049 INFO L93 Difference]: Finished difference Result 3582 states and 12461 transitions. [2022-01-18 05:29:54,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 05:29:54,049 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:29:54,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:54,055 INFO L225 Difference]: With dead ends: 3582 [2022-01-18 05:29:54,056 INFO L226 Difference]: Without dead ends: 3574 [2022-01-18 05:29:54,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=697, Invalid=5003, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 05:29:54,056 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 225 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 2560 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 3426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 2560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 734 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:54,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 180 Invalid, 3426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 2560 Invalid, 0 Unknown, 734 Unchecked, 1.0s Time] [2022-01-18 05:29:54,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3574 states. [2022-01-18 05:29:54,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3574 to 1543. [2022-01-18 05:29:54,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1543 states, 1542 states have (on average 3.4163424124513617) internal successors, (5268), 1542 states have internal predecessors, (5268), 0 states have call successors, (0), 0 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 05:29:54,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 5268 transitions. [2022-01-18 05:29:54,086 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 5268 transitions. Word has length 24 [2022-01-18 05:29:54,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:54,086 INFO L470 AbstractCegarLoop]: Abstraction has 1543 states and 5268 transitions. [2022-01-18 05:29:54,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:29:54,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 5268 transitions. [2022-01-18 05:29:54,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:29:54,089 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:54,089 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] [2022-01-18 05:29:54,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-01-18 05:29:54,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-01-18 05:29:54,307 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:29:54,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:54,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1904300301, now seen corresponding path program 78 times [2022-01-18 05:29:54,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:54,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532161207] [2022-01-18 05:29:54,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:54,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:54,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:54,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532161207] [2022-01-18 05:29:54,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532161207] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:54,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78946655] [2022-01-18 05:29:54,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:29:54,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:54,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:54,535 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:29:54,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-01-18 05:29:54,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:29:54,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:29:54,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 05:29:54,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:55,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:55,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:55,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:55,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:29:55,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2022-01-18 05:29:55,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:55,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:55,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:55,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:55,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:55,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:55,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2022-01-18 05:29:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:55,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78946655] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:55,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:55,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-01-18 05:29:55,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849208143] [2022-01-18 05:29:55,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:55,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:29:55,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:55,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:29:55,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:29:55,973 INFO L87 Difference]: Start difference. First operand 1543 states and 5268 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:29:57,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:29:57,056 INFO L93 Difference]: Finished difference Result 1958 states and 6704 transitions. [2022-01-18 05:29:57,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 05:29:57,056 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:29:57,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:29:57,060 INFO L225 Difference]: With dead ends: 1958 [2022-01-18 05:29:57,060 INFO L226 Difference]: Without dead ends: 1952 [2022-01-18 05:29:57,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=378, Invalid=2274, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 05:29:57,060 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 136 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1076 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:29:57,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 173 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 493 Invalid, 0 Unknown, 1076 Unchecked, 0.2s Time] [2022-01-18 05:29:57,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1952 states. [2022-01-18 05:29:57,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1952 to 1625. [2022-01-18 05:29:57,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 3.4538177339901477) internal successors, (5609), 1624 states have internal predecessors, (5609), 0 states have call successors, (0), 0 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 05:29:57,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5609 transitions. [2022-01-18 05:29:57,082 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5609 transitions. Word has length 24 [2022-01-18 05:29:57,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:29:57,082 INFO L470 AbstractCegarLoop]: Abstraction has 1625 states and 5609 transitions. [2022-01-18 05:29:57,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:29:57,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5609 transitions. [2022-01-18 05:29:57,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:29:57,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:29:57,085 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] [2022-01-18 05:29:57,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-01-18 05:29:57,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-01-18 05:29:57,285 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:29:57,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:29:57,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1475585507, now seen corresponding path program 79 times [2022-01-18 05:29:57,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:29:57,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448231584] [2022-01-18 05:29:57,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:29:57,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:29:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:57,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:29:57,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448231584] [2022-01-18 05:29:57,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448231584] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:29:57,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104171661] [2022-01-18 05:29:57,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:29:57,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:29:57,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:29:57,497 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:29:57,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-01-18 05:29:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:29:57,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:29:57,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:29:57,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:57,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:57,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:57,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:57,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:29:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:57,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:29:58,027 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:29:58,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:29:58,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:58,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:29:58,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:58,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:29:58,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:29:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:29:58,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104171661] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:29:58,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:29:58,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:29:58,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895658831] [2022-01-18 05:29:58,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:29:58,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:29:58,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:29:58,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:29:58,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:29:58,089 INFO L87 Difference]: Start difference. First operand 1625 states and 5609 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:00,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:00,839 INFO L93 Difference]: Finished difference Result 3914 states and 13821 transitions. [2022-01-18 05:30:00,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 05:30:00,840 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:30:00,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:00,847 INFO L225 Difference]: With dead ends: 3914 [2022-01-18 05:30:00,847 INFO L226 Difference]: Without dead ends: 3907 [2022-01-18 05:30:00,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 36 SyntacticMatches, 10 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=608, Invalid=4362, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 05:30:00,847 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 254 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 2208 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 3013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 711 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:00,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 159 Invalid, 3013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2208 Invalid, 0 Unknown, 711 Unchecked, 0.9s Time] [2022-01-18 05:30:00,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2022-01-18 05:30:00,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 1562. [2022-01-18 05:30:00,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 3.4228058936579115) internal successors, (5343), 1561 states have internal predecessors, (5343), 0 states have call successors, (0), 0 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 05:30:00,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 5343 transitions. [2022-01-18 05:30:00,879 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 5343 transitions. Word has length 24 [2022-01-18 05:30:00,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:00,879 INFO L470 AbstractCegarLoop]: Abstraction has 1562 states and 5343 transitions. [2022-01-18 05:30:00,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:00,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 5343 transitions. [2022-01-18 05:30:00,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:30:00,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:00,881 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] [2022-01-18 05:30:00,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-01-18 05:30:01,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-01-18 05:30:01,082 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:30:01,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:01,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1011927326, now seen corresponding path program 11 times [2022-01-18 05:30:01,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:01,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618720662] [2022-01-18 05:30:01,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:01,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:01,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:01,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618720662] [2022-01-18 05:30:01,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618720662] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:01,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369320251] [2022-01-18 05:30:01,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:30:01,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:01,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:01,296 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:30:01,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-01-18 05:30:01,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:30:01,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:01,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:30:01,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:01,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:01,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:01,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:01,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:01,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:30:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:01,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:01,859 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:30:01,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:30:01,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:01,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:01,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:01,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:01,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:30:01,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:01,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369320251] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:01,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:01,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:30:01,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3883094] [2022-01-18 05:30:01,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:01,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:30:01,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:01,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:30:01,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:30:01,926 INFO L87 Difference]: Start difference. First operand 1562 states and 5343 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:03,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:03,481 INFO L93 Difference]: Finished difference Result 2864 states and 10083 transitions. [2022-01-18 05:30:03,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 05:30:03,481 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:30:03,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:03,486 INFO L225 Difference]: With dead ends: 2864 [2022-01-18 05:30:03,486 INFO L226 Difference]: Without dead ends: 2860 [2022-01-18 05:30:03,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=291, Invalid=2159, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 05:30:03,487 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 167 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 700 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:03,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 186 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1956 Invalid, 0 Unknown, 700 Unchecked, 0.8s Time] [2022-01-18 05:30:03,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2022-01-18 05:30:03,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 1483. [2022-01-18 05:30:03,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 3.3920377867746287) internal successors, (5027), 1482 states have internal predecessors, (5027), 0 states have call successors, (0), 0 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 05:30:03,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 5027 transitions. [2022-01-18 05:30:03,511 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 5027 transitions. Word has length 24 [2022-01-18 05:30:03,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:03,511 INFO L470 AbstractCegarLoop]: Abstraction has 1483 states and 5027 transitions. [2022-01-18 05:30:03,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:03,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 5027 transitions. [2022-01-18 05:30:03,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:30:03,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:03,513 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] [2022-01-18 05:30:03,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-01-18 05:30:03,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:03,713 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:30:03,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:03,714 INFO L85 PathProgramCache]: Analyzing trace with hash 50753249, now seen corresponding path program 80 times [2022-01-18 05:30:03,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:03,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409692888] [2022-01-18 05:30:03,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:03,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:03,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:03,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:03,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:03,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409692888] [2022-01-18 05:30:03,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409692888] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:03,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441276175] [2022-01-18 05:30:03,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:30:03,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:03,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:03,898 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:30:03,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-01-18 05:30:03,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:30:03,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:03,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:30:03,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:04,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:04,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:04,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:04,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:04,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-01-18 05:30:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:04,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:04,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:04,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:30:04,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-01-18 05:30:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:04,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441276175] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:04,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:04,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-01-18 05:30:04,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727143108] [2022-01-18 05:30:04,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:04,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:30:04,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:04,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:30:04,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:30:04,888 INFO L87 Difference]: Start difference. First operand 1483 states and 5027 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:30:06,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:06,166 INFO L93 Difference]: Finished difference Result 2603 states and 8217 transitions. [2022-01-18 05:30:06,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 05:30:06,166 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:30:06,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:06,170 INFO L225 Difference]: With dead ends: 2603 [2022-01-18 05:30:06,170 INFO L226 Difference]: Without dead ends: 2591 [2022-01-18 05:30:06,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=352, Invalid=3430, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 05:30:06,171 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 213 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 2045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 703 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:06,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 366 Invalid, 2045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1309 Invalid, 0 Unknown, 703 Unchecked, 0.5s Time] [2022-01-18 05:30:06,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2022-01-18 05:30:06,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 1556. [2022-01-18 05:30:06,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1556 states, 1555 states have (on average 3.347909967845659) internal successors, (5206), 1555 states have internal predecessors, (5206), 0 states have call successors, (0), 0 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 05:30:06,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1556 states to 1556 states and 5206 transitions. [2022-01-18 05:30:06,197 INFO L78 Accepts]: Start accepts. Automaton has 1556 states and 5206 transitions. Word has length 24 [2022-01-18 05:30:06,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:06,197 INFO L470 AbstractCegarLoop]: Abstraction has 1556 states and 5206 transitions. [2022-01-18 05:30:06,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:30:06,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1556 states and 5206 transitions. [2022-01-18 05:30:06,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:30:06,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:06,199 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] [2022-01-18 05:30:06,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-01-18 05:30:06,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:06,400 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:30:06,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:06,401 INFO L85 PathProgramCache]: Analyzing trace with hash -2103294839, now seen corresponding path program 81 times [2022-01-18 05:30:06,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:06,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488571387] [2022-01-18 05:30:06,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:06,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:06,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:06,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488571387] [2022-01-18 05:30:06,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488571387] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:06,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794488324] [2022-01-18 05:30:06,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:30:06,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:06,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:06,608 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:30:06,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-01-18 05:30:06,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:30:06,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:06,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:30:06,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:07,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:07,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:07,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:07,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:07,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 05:30:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:07,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:07,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:07,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:30:07,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-01-18 05:30:07,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:07,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794488324] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:07,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:07,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-01-18 05:30:07,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699866935] [2022-01-18 05:30:07,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:07,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:30:07,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:07,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:30:07,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:30:07,605 INFO L87 Difference]: Start difference. First operand 1556 states and 5206 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:30:08,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:08,316 INFO L93 Difference]: Finished difference Result 2391 states and 7715 transitions. [2022-01-18 05:30:08,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 05:30:08,316 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:30:08,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:08,320 INFO L225 Difference]: With dead ends: 2391 [2022-01-18 05:30:08,320 INFO L226 Difference]: Without dead ends: 2380 [2022-01-18 05:30:08,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=253, Invalid=2197, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 05:30:08,321 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 169 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 567 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:08,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 219 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 715 Invalid, 0 Unknown, 567 Unchecked, 0.3s Time] [2022-01-18 05:30:08,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2022-01-18 05:30:08,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 1604. [2022-01-18 05:30:08,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1603 states have (on average 3.315658140985652) internal successors, (5315), 1603 states have internal predecessors, (5315), 0 states have call successors, (0), 0 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 05:30:08,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 5315 transitions. [2022-01-18 05:30:08,343 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 5315 transitions. Word has length 24 [2022-01-18 05:30:08,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:08,343 INFO L470 AbstractCegarLoop]: Abstraction has 1604 states and 5315 transitions. [2022-01-18 05:30:08,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:30:08,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 5315 transitions. [2022-01-18 05:30:08,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:30:08,345 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:08,345 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] [2022-01-18 05:30:08,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-01-18 05:30:08,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-01-18 05:30:08,546 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:30:08,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:08,546 INFO L85 PathProgramCache]: Analyzing trace with hash 927226883, now seen corresponding path program 82 times [2022-01-18 05:30:08,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:08,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721087224] [2022-01-18 05:30:08,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:08,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:08,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:08,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:08,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721087224] [2022-01-18 05:30:08,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721087224] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:08,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114780649] [2022-01-18 05:30:08,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:30:08,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:08,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:08,727 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:30:08,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-01-18 05:30:08,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:30:08,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:08,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:30:08,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:09,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:09,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:09,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:09,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:09,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:30:09,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:09,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:09,271 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:30:09,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:30:09,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:09,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:09,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:09,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:09,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:30:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:09,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114780649] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:09,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:09,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:30:09,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765825138] [2022-01-18 05:30:09,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:09,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:30:09,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:09,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:30:09,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:30:09,333 INFO L87 Difference]: Start difference. First operand 1604 states and 5315 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:10,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:10,748 INFO L93 Difference]: Finished difference Result 2451 states and 7860 transitions. [2022-01-18 05:30:10,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 05:30:10,748 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:30:10,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:10,752 INFO L225 Difference]: With dead ends: 2451 [2022-01-18 05:30:10,752 INFO L226 Difference]: Without dead ends: 2444 [2022-01-18 05:30:10,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=214, Invalid=2042, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 05:30:10,753 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 187 mSDsluCounter, 1827 mSDsCounter, 0 mSdLazyCounter, 2232 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 3463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1199 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:10,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 244 Invalid, 3463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2232 Invalid, 0 Unknown, 1199 Unchecked, 0.8s Time] [2022-01-18 05:30:10,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2022-01-18 05:30:10,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 1555. [2022-01-18 05:30:10,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1554 states have (on average 3.3474903474903477) internal successors, (5202), 1554 states have internal predecessors, (5202), 0 states have call successors, (0), 0 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 05:30:10,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 5202 transitions. [2022-01-18 05:30:10,776 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 5202 transitions. Word has length 24 [2022-01-18 05:30:10,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:10,776 INFO L470 AbstractCegarLoop]: Abstraction has 1555 states and 5202 transitions. [2022-01-18 05:30:10,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:10,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 5202 transitions. [2022-01-18 05:30:10,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:30:10,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:10,779 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] [2022-01-18 05:30:10,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-01-18 05:30:10,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:10,981 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:30:10,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:10,981 INFO L85 PathProgramCache]: Analyzing trace with hash -295155111, now seen corresponding path program 83 times [2022-01-18 05:30:10,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:10,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864210199] [2022-01-18 05:30:10,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:10,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:11,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:11,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864210199] [2022-01-18 05:30:11,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864210199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:11,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068972670] [2022-01-18 05:30:11,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:30:11,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:11,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:11,185 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:30:11,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-01-18 05:30:11,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:30:11,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:11,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:30:11,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:11,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:11,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:11,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:11,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:11,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:30:11,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:11,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:11,767 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:30:11,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:30:11,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:11,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:11,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:11,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:11,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:30:11,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:11,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068972670] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:11,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:11,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:30:11,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717271263] [2022-01-18 05:30:11,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:11,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:30:11,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:11,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:30:11,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:30:11,827 INFO L87 Difference]: Start difference. First operand 1555 states and 5202 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:13,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:13,074 INFO L93 Difference]: Finished difference Result 2045 states and 6666 transitions. [2022-01-18 05:30:13,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 05:30:13,074 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:30:13,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:13,078 INFO L225 Difference]: With dead ends: 2045 [2022-01-18 05:30:13,078 INFO L226 Difference]: Without dead ends: 2038 [2022-01-18 05:30:13,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=232, Invalid=2318, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 05:30:13,078 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 156 mSDsluCounter, 1517 mSDsCounter, 0 mSdLazyCounter, 1799 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 3167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1338 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:13,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 198 Invalid, 3167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1799 Invalid, 0 Unknown, 1338 Unchecked, 0.7s Time] [2022-01-18 05:30:13,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2022-01-18 05:30:13,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1566. [2022-01-18 05:30:13,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 3.3405750798722043) internal successors, (5228), 1565 states have internal predecessors, (5228), 0 states have call successors, (0), 0 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 05:30:13,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 5228 transitions. [2022-01-18 05:30:13,100 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 5228 transitions. Word has length 24 [2022-01-18 05:30:13,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:13,100 INFO L470 AbstractCegarLoop]: Abstraction has 1566 states and 5228 transitions. [2022-01-18 05:30:13,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:13,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 5228 transitions. [2022-01-18 05:30:13,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:30:13,102 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:13,102 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] [2022-01-18 05:30:13,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-01-18 05:30:13,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:13,302 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:30:13,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:13,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1559600685, now seen corresponding path program 84 times [2022-01-18 05:30:13,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:13,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931329535] [2022-01-18 05:30:13,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:13,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:13,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:13,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931329535] [2022-01-18 05:30:13,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931329535] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:13,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569955838] [2022-01-18 05:30:13,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:30:13,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:13,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:13,493 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:30:13,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-01-18 05:30:13,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:30:13,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:13,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 05:30:13,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:13,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:13,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:13,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:13,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:30:13,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2022-01-18 05:30:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:14,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:14,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:14,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:14,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:14,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:14,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2022-01-18 05:30:14,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:14,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569955838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:14,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:14,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-01-18 05:30:14,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700080364] [2022-01-18 05:30:14,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:14,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:30:14,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:14,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:30:14,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:30:14,590 INFO L87 Difference]: Start difference. First operand 1566 states and 5228 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:17,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:17,275 INFO L93 Difference]: Finished difference Result 2641 states and 8716 transitions. [2022-01-18 05:30:17,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-18 05:30:17,275 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:30:17,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:17,280 INFO L225 Difference]: With dead ends: 2641 [2022-01-18 05:30:17,280 INFO L226 Difference]: Without dead ends: 2637 [2022-01-18 05:30:17,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2359 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=877, Invalid=6779, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 05:30:17,281 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 224 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 721 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:17,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 145 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1187 Invalid, 0 Unknown, 721 Unchecked, 0.5s Time] [2022-01-18 05:30:17,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2022-01-18 05:30:17,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 1591. [2022-01-18 05:30:17,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 3.3276729559748426) internal successors, (5291), 1590 states have internal predecessors, (5291), 0 states have call successors, (0), 0 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 05:30:17,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5291 transitions. [2022-01-18 05:30:17,305 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5291 transitions. Word has length 24 [2022-01-18 05:30:17,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:17,306 INFO L470 AbstractCegarLoop]: Abstraction has 1591 states and 5291 transitions. [2022-01-18 05:30:17,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:17,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5291 transitions. [2022-01-18 05:30:17,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:30:17,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:17,308 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] [2022-01-18 05:30:17,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-01-18 05:30:17,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:17,508 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:30:17,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:17,508 INFO L85 PathProgramCache]: Analyzing trace with hash 938415252, now seen corresponding path program 12 times [2022-01-18 05:30:17,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:17,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307533238] [2022-01-18 05:30:17,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:17,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:17,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:17,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307533238] [2022-01-18 05:30:17,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307533238] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:17,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479101777] [2022-01-18 05:30:17,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:30:17,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:17,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:17,704 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:30:17,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-01-18 05:30:17,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:30:17,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:17,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 05:30:17,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:18,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:18,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:18,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:18,222 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:30:18,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2022-01-18 05:30:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:18,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:18,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:18,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:18,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:18,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:18,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2022-01-18 05:30:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:18,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479101777] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:18,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:18,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-01-18 05:30:18,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861784060] [2022-01-18 05:30:18,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:18,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:30:18,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:18,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:30:18,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:30:18,814 INFO L87 Difference]: Start difference. First operand 1591 states and 5291 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:22,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:22,728 INFO L93 Difference]: Finished difference Result 3196 states and 10645 transitions. [2022-01-18 05:30:22,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-18 05:30:22,729 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:30:22,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:22,734 INFO L225 Difference]: With dead ends: 3196 [2022-01-18 05:30:22,734 INFO L226 Difference]: Without dead ends: 3192 [2022-01-18 05:30:22,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3439 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1267, Invalid=9239, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 05:30:22,735 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 311 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 3211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1606 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:22,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 155 Invalid, 3211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1517 Invalid, 0 Unknown, 1606 Unchecked, 0.7s Time] [2022-01-18 05:30:22,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3192 states. [2022-01-18 05:30:22,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3192 to 1614. [2022-01-18 05:30:22,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1613 states have (on average 3.3161810291382516) internal successors, (5349), 1613 states have internal predecessors, (5349), 0 states have call successors, (0), 0 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 05:30:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 5349 transitions. [2022-01-18 05:30:22,763 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 5349 transitions. Word has length 24 [2022-01-18 05:30:22,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:22,763 INFO L470 AbstractCegarLoop]: Abstraction has 1614 states and 5349 transitions. [2022-01-18 05:30:22,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:22,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 5349 transitions. [2022-01-18 05:30:22,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:30:22,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:22,766 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] [2022-01-18 05:30:22,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-01-18 05:30:22,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-01-18 05:30:22,966 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:30:22,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:22,966 INFO L85 PathProgramCache]: Analyzing trace with hash 893357365, now seen corresponding path program 85 times [2022-01-18 05:30:22,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:22,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837544335] [2022-01-18 05:30:22,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:22,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:23,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:23,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837544335] [2022-01-18 05:30:23,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837544335] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:23,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903194112] [2022-01-18 05:30:23,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:30:23,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:23,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:23,187 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:30:23,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-01-18 05:30:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:23,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:30:23,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:23,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:23,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:23,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:23,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:23,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:30:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:23,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:23,735 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:30:23,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:30:23,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:23,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:23,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:23,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:23,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:30:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:23,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903194112] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:23,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:23,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:30:23,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498434374] [2022-01-18 05:30:23,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:23,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:30:23,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:23,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:30:23,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:30:23,790 INFO L87 Difference]: Start difference. First operand 1614 states and 5349 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:24,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:24,470 INFO L93 Difference]: Finished difference Result 2011 states and 6574 transitions. [2022-01-18 05:30:24,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 05:30:24,470 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:30:24,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:24,473 INFO L225 Difference]: With dead ends: 2011 [2022-01-18 05:30:24,474 INFO L226 Difference]: Without dead ends: 2005 [2022-01-18 05:30:24,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 05:30:24,474 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 140 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 858 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:24,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 132 Invalid, 1920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1036 Invalid, 0 Unknown, 858 Unchecked, 0.4s Time] [2022-01-18 05:30:24,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2005 states. [2022-01-18 05:30:24,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2005 to 1605. [2022-01-18 05:30:24,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 3.321695760598504) internal successors, (5328), 1604 states have internal predecessors, (5328), 0 states have call successors, (0), 0 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 05:30:24,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 5328 transitions. [2022-01-18 05:30:24,497 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 5328 transitions. Word has length 24 [2022-01-18 05:30:24,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:24,498 INFO L470 AbstractCegarLoop]: Abstraction has 1605 states and 5328 transitions. [2022-01-18 05:30:24,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:24,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 5328 transitions. [2022-01-18 05:30:24,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:30:24,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:24,500 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] [2022-01-18 05:30:24,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-01-18 05:30:24,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-01-18 05:30:24,716 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:30:24,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:24,716 INFO L85 PathProgramCache]: Analyzing trace with hash -761953865, now seen corresponding path program 86 times [2022-01-18 05:30:24,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:24,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446654751] [2022-01-18 05:30:24,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:24,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:24,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:24,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446654751] [2022-01-18 05:30:24,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446654751] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:24,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293193931] [2022-01-18 05:30:24,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:30:24,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:24,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:24,910 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:30:24,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-01-18 05:30:24,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:30:24,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:24,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:30:24,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:25,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:25,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:25,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:25,225 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:30:25,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 05:30:25,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:25,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:25,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:25,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:25,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:30:25,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:30:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:25,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293193931] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:25,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:25,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:30:25,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801666258] [2022-01-18 05:30:25,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:25,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:30:25,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:25,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:30:25,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:30:25,944 INFO L87 Difference]: Start difference. First operand 1605 states and 5328 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:30:26,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:26,692 INFO L93 Difference]: Finished difference Result 3053 states and 10320 transitions. [2022-01-18 05:30:26,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 05:30:26,693 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:30:26,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:26,698 INFO L225 Difference]: With dead ends: 3053 [2022-01-18 05:30:26,698 INFO L226 Difference]: Without dead ends: 3044 [2022-01-18 05:30:26,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=314, Invalid=1942, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 05:30:26,699 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 95 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 807 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:26,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 163 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 448 Invalid, 0 Unknown, 807 Unchecked, 0.2s Time] [2022-01-18 05:30:26,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2022-01-18 05:30:26,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 1643. [2022-01-18 05:30:26,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 3.302070645554202) internal successors, (5422), 1642 states have internal predecessors, (5422), 0 states have call successors, (0), 0 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 05:30:26,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 5422 transitions. [2022-01-18 05:30:26,726 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 5422 transitions. Word has length 24 [2022-01-18 05:30:26,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:26,726 INFO L470 AbstractCegarLoop]: Abstraction has 1643 states and 5422 transitions. [2022-01-18 05:30:26,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:30:26,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 5422 transitions. [2022-01-18 05:30:26,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:30:26,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:26,728 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] [2022-01-18 05:30:26,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-01-18 05:30:26,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-01-18 05:30:26,929 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:30:26,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:26,929 INFO L85 PathProgramCache]: Analyzing trace with hash -958467370, now seen corresponding path program 13 times [2022-01-18 05:30:26,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:26,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156993378] [2022-01-18 05:30:26,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:26,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:26,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:27,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:27,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:27,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156993378] [2022-01-18 05:30:27,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156993378] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:27,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153537718] [2022-01-18 05:30:27,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:30:27,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:27,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:27,123 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:30:27,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-01-18 05:30:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:27,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:30:27,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:27,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:27,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:27,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:27,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:27,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:30:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:27,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:27,652 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:30:27,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:30:27,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:27,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:27,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:27,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:27,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:30:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:27,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153537718] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:27,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:27,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:30:27,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889172026] [2022-01-18 05:30:27,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:27,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:30:27,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:27,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:30:27,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:30:27,706 INFO L87 Difference]: Start difference. First operand 1643 states and 5422 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:28,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:28,482 INFO L93 Difference]: Finished difference Result 2100 states and 6811 transitions. [2022-01-18 05:30:28,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 05:30:28,483 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:30:28,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:28,486 INFO L225 Difference]: With dead ends: 2100 [2022-01-18 05:30:28,486 INFO L226 Difference]: Without dead ends: 2096 [2022-01-18 05:30:28,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=204, Invalid=1602, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 05:30:28,486 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 239 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 787 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:28,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 126 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1069 Invalid, 0 Unknown, 787 Unchecked, 0.4s Time] [2022-01-18 05:30:28,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2022-01-18 05:30:28,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 1624. [2022-01-18 05:30:28,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 3.311152187307455) internal successors, (5374), 1623 states have internal predecessors, (5374), 0 states have call successors, (0), 0 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 05:30:28,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 5374 transitions. [2022-01-18 05:30:28,508 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 5374 transitions. Word has length 24 [2022-01-18 05:30:28,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:28,508 INFO L470 AbstractCegarLoop]: Abstraction has 1624 states and 5374 transitions. [2022-01-18 05:30:28,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:28,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 5374 transitions. [2022-01-18 05:30:28,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:30:28,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:28,510 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] [2022-01-18 05:30:28,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-01-18 05:30:28,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-01-18 05:30:28,711 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:30:28,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:28,711 INFO L85 PathProgramCache]: Analyzing trace with hash -199377759, now seen corresponding path program 87 times [2022-01-18 05:30:28,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:28,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121947522] [2022-01-18 05:30:28,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:28,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:28,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:28,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121947522] [2022-01-18 05:30:28,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121947522] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:28,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123100312] [2022-01-18 05:30:28,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:30:28,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:28,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:28,968 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:30:28,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-01-18 05:30:28,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:30:28,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:28,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:30:28,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:29,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:29,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:29,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:29,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:30:29,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2022-01-18 05:30:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:29,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:29,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:29,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:29,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:29,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:29,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2022-01-18 05:30:29,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:29,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123100312] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:29,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:29,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-01-18 05:30:29,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442803302] [2022-01-18 05:30:29,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:29,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:30:29,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:29,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:30:29,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:30:29,914 INFO L87 Difference]: Start difference. First operand 1624 states and 5374 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:30:33,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:33,589 INFO L93 Difference]: Finished difference Result 2836 states and 9082 transitions. [2022-01-18 05:30:33,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-18 05:30:33,590 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:30:33,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:33,595 INFO L225 Difference]: With dead ends: 2836 [2022-01-18 05:30:33,595 INFO L226 Difference]: Without dead ends: 2804 [2022-01-18 05:30:33,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2366 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=862, Invalid=7510, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 05:30:33,596 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 564 mSDsluCounter, 1723 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 4140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1582 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:33,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 175 Invalid, 4140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 2308 Invalid, 0 Unknown, 1582 Unchecked, 1.1s Time] [2022-01-18 05:30:33,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2022-01-18 05:30:33,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 1642. [2022-01-18 05:30:33,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1641 states have (on average 3.3132236441194394) internal successors, (5437), 1641 states have internal predecessors, (5437), 0 states have call successors, (0), 0 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 05:30:33,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 5437 transitions. [2022-01-18 05:30:33,622 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 5437 transitions. Word has length 24 [2022-01-18 05:30:33,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:33,622 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 5437 transitions. [2022-01-18 05:30:33,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:30:33,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 5437 transitions. [2022-01-18 05:30:33,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:30:33,624 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:33,624 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] [2022-01-18 05:30:33,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-01-18 05:30:33,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-01-18 05:30:33,824 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:30:33,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:33,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1736865753, now seen corresponding path program 88 times [2022-01-18 05:30:33,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:33,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775484623] [2022-01-18 05:30:33,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:33,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:33,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:34,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:34,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775484623] [2022-01-18 05:30:34,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775484623] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:34,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119053031] [2022-01-18 05:30:34,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:30:34,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:34,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:34,067 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:30:34,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-01-18 05:30:34,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:30:34,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:34,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:30:34,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:34,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:34,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:34,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:34,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:34,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:30:34,367 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:34,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:34,577 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:30:34,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:30:34,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:34,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:34,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:34,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:34,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:30:34,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:34,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119053031] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:34,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:34,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:30:34,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907895156] [2022-01-18 05:30:34,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:34,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:30:34,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:34,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:30:34,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:30:34,635 INFO L87 Difference]: Start difference. First operand 1642 states and 5437 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:35,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:35,862 INFO L93 Difference]: Finished difference Result 2119 states and 7012 transitions. [2022-01-18 05:30:35,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 05:30:35,862 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:30:35,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:35,866 INFO L225 Difference]: With dead ends: 2119 [2022-01-18 05:30:35,866 INFO L226 Difference]: Without dead ends: 2112 [2022-01-18 05:30:35,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=278, Invalid=2074, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 05:30:35,866 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 129 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 637 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:35,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 154 Invalid, 2227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1532 Invalid, 0 Unknown, 637 Unchecked, 0.6s Time] [2022-01-18 05:30:35,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2022-01-18 05:30:35,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1642. [2022-01-18 05:30:35,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1641 states have (on average 3.3132236441194394) internal successors, (5437), 1641 states have internal predecessors, (5437), 0 states have call successors, (0), 0 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 05:30:35,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 5437 transitions. [2022-01-18 05:30:35,889 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 5437 transitions. Word has length 24 [2022-01-18 05:30:35,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:35,889 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 5437 transitions. [2022-01-18 05:30:35,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:35,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 5437 transitions. [2022-01-18 05:30:35,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:30:35,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:35,891 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] [2022-01-18 05:30:35,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-01-18 05:30:36,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-01-18 05:30:36,092 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:30:36,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:36,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1459870753, now seen corresponding path program 89 times [2022-01-18 05:30:36,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:36,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901308880] [2022-01-18 05:30:36,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:36,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:36,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:36,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:36,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901308880] [2022-01-18 05:30:36,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901308880] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:36,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382384872] [2022-01-18 05:30:36,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:30:36,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:36,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:36,361 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:30:36,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-01-18 05:30:36,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 05:30:36,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:36,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:30:36,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:36,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:36,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:36,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:36,629 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:30:36,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2022-01-18 05:30:36,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:36,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:37,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:37,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:37,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:37,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:37,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2022-01-18 05:30:37,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:37,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382384872] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:37,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:37,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-01-18 05:30:37,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544627464] [2022-01-18 05:30:37,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:37,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 05:30:37,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:37,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 05:30:37,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:30:37,426 INFO L87 Difference]: Start difference. First operand 1642 states and 5437 transitions. Second operand has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:30:38,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:38,196 INFO L93 Difference]: Finished difference Result 2348 states and 7751 transitions. [2022-01-18 05:30:38,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 05:30:38,197 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:30:38,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:38,201 INFO L225 Difference]: With dead ends: 2348 [2022-01-18 05:30:38,201 INFO L226 Difference]: Without dead ends: 2341 [2022-01-18 05:30:38,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=258, Invalid=1998, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 05:30:38,201 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 138 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 813 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:38,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 127 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 616 Invalid, 0 Unknown, 813 Unchecked, 0.2s Time] [2022-01-18 05:30:38,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2022-01-18 05:30:38,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 1653. [2022-01-18 05:30:38,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 3.305084745762712) internal successors, (5460), 1652 states have internal predecessors, (5460), 0 states have call successors, (0), 0 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 05:30:38,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 5460 transitions. [2022-01-18 05:30:38,224 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 5460 transitions. Word has length 24 [2022-01-18 05:30:38,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:38,224 INFO L470 AbstractCegarLoop]: Abstraction has 1653 states and 5460 transitions. [2022-01-18 05:30:38,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:30:38,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 5460 transitions. [2022-01-18 05:30:38,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:30:38,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:38,227 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] [2022-01-18 05:30:38,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-01-18 05:30:38,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-01-18 05:30:38,439 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:30:38,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:38,439 INFO L85 PathProgramCache]: Analyzing trace with hash 988875043, now seen corresponding path program 90 times [2022-01-18 05:30:38,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:38,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133328390] [2022-01-18 05:30:38,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:38,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:38,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:38,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133328390] [2022-01-18 05:30:38,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133328390] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:38,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708797938] [2022-01-18 05:30:38,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:30:38,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:38,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:38,678 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:30:38,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-01-18 05:30:38,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 05:30:38,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:38,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:30:38,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:38,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:38,930 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:30:38,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-01-18 05:30:39,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:39,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:39,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:39,493 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:30:39,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-01-18 05:30:39,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:39,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708797938] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:39,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:39,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:30:39,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992913018] [2022-01-18 05:30:39,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:39,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:30:39,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:39,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:30:39,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:30:39,619 INFO L87 Difference]: Start difference. First operand 1653 states and 5460 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:40,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:40,763 INFO L93 Difference]: Finished difference Result 1924 states and 6308 transitions. [2022-01-18 05:30:40,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 05:30:40,763 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:30:40,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:40,767 INFO L225 Difference]: With dead ends: 1924 [2022-01-18 05:30:40,767 INFO L226 Difference]: Without dead ends: 1918 [2022-01-18 05:30:40,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=247, Invalid=1915, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 05:30:40,767 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 88 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:40,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 116 Invalid, 1839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1553 Invalid, 0 Unknown, 262 Unchecked, 0.6s Time] [2022-01-18 05:30:40,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2022-01-18 05:30:40,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1654. [2022-01-18 05:30:40,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.3042952208106473) internal successors, (5462), 1653 states have internal predecessors, (5462), 0 states have call successors, (0), 0 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 05:30:40,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5462 transitions. [2022-01-18 05:30:40,787 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5462 transitions. Word has length 24 [2022-01-18 05:30:40,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:40,787 INFO L470 AbstractCegarLoop]: Abstraction has 1654 states and 5462 transitions. [2022-01-18 05:30:40,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:40,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5462 transitions. [2022-01-18 05:30:40,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:30:40,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:40,790 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] [2022-01-18 05:30:40,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-01-18 05:30:40,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2022-01-18 05:30:40,990 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:30:40,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:40,990 INFO L85 PathProgramCache]: Analyzing trace with hash 626132313, now seen corresponding path program 91 times [2022-01-18 05:30:40,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:40,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996376347] [2022-01-18 05:30:40,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:40,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:41,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:41,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996376347] [2022-01-18 05:30:41,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996376347] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:41,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179282122] [2022-01-18 05:30:41,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:30:41,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:41,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:41,220 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:30:41,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-01-18 05:30:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:41,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:30:41,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:41,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:41,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:41,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:41,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:41,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-01-18 05:30:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:41,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:41,731 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:30:41,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:30:41,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:41,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:41,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:41,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:41,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:30:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:41,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179282122] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:41,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:41,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:30:41,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107764053] [2022-01-18 05:30:41,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:41,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:30:41,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:41,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:30:41,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:30:41,792 INFO L87 Difference]: Start difference. First operand 1654 states and 5462 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:42,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:42,780 INFO L93 Difference]: Finished difference Result 1970 states and 6486 transitions. [2022-01-18 05:30:42,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 05:30:42,780 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:30:42,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:42,784 INFO L225 Difference]: With dead ends: 1970 [2022-01-18 05:30:42,784 INFO L226 Difference]: Without dead ends: 1966 [2022-01-18 05:30:42,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 05:30:42,785 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 55 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:42,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 94 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1418 Invalid, 0 Unknown, 196 Unchecked, 0.5s Time] [2022-01-18 05:30:42,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2022-01-18 05:30:42,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1662. [2022-01-18 05:30:42,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 3.299819385912101) internal successors, (5481), 1661 states have internal predecessors, (5481), 0 states have call successors, (0), 0 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 05:30:42,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5481 transitions. [2022-01-18 05:30:42,806 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5481 transitions. Word has length 24 [2022-01-18 05:30:42,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:42,806 INFO L470 AbstractCegarLoop]: Abstraction has 1662 states and 5481 transitions. [2022-01-18 05:30:42,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:42,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5481 transitions. [2022-01-18 05:30:42,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:30:42,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:42,808 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] [2022-01-18 05:30:42,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-01-18 05:30:43,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:43,009 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:30:43,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:43,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1513635994, now seen corresponding path program 14 times [2022-01-18 05:30:43,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:43,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063740367] [2022-01-18 05:30:43,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:43,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:43,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:43,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:43,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063740367] [2022-01-18 05:30:43,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063740367] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:43,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109433085] [2022-01-18 05:30:43,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:30:43,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:43,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:43,235 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:30:43,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-01-18 05:30:43,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:30:43,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:43,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:30:43,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:43,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:43,492 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:30:43,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2022-01-18 05:30:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:43,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:44,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:44,177 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:30:44,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 55 [2022-01-18 05:30:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:44,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109433085] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:44,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:44,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-18 05:30:44,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299771564] [2022-01-18 05:30:44,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:44,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:30:44,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:44,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:30:44,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:30:44,287 INFO L87 Difference]: Start difference. First operand 1662 states and 5481 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:45,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:45,822 INFO L93 Difference]: Finished difference Result 1974 states and 6440 transitions. [2022-01-18 05:30:45,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 05:30:45,822 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:30:45,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:45,825 INFO L225 Difference]: With dead ends: 1974 [2022-01-18 05:30:45,825 INFO L226 Difference]: Without dead ends: 1960 [2022-01-18 05:30:45,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=268, Invalid=2182, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 05:30:45,826 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 110 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 2035 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 416 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:45,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 129 Invalid, 2483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2035 Invalid, 0 Unknown, 416 Unchecked, 0.8s Time] [2022-01-18 05:30:45,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2022-01-18 05:30:45,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1657. [2022-01-18 05:30:45,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1656 states have (on average 3.301328502415459) internal successors, (5467), 1656 states have internal predecessors, (5467), 0 states have call successors, (0), 0 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 05:30:45,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 5467 transitions. [2022-01-18 05:30:45,846 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 5467 transitions. Word has length 24 [2022-01-18 05:30:45,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:45,846 INFO L470 AbstractCegarLoop]: Abstraction has 1657 states and 5467 transitions. [2022-01-18 05:30:45,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:45,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 5467 transitions. [2022-01-18 05:30:45,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:30:45,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:45,848 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] [2022-01-18 05:30:45,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-01-18 05:30:46,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:46,049 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:30:46,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:46,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1320486233, now seen corresponding path program 92 times [2022-01-18 05:30:46,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:46,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609384586] [2022-01-18 05:30:46,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:46,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:46,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:46,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:46,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:46,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609384586] [2022-01-18 05:30:46,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609384586] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:46,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859935142] [2022-01-18 05:30:46,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:30:46,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:46,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:46,242 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:30:46,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-01-18 05:30:46,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:30:46,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:46,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:30:46,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:46,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:46,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:46,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:46,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:46,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-01-18 05:30:46,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:46,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:47,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:47,131 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:30:47,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-01-18 05:30:47,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:47,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859935142] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:47,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:47,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-01-18 05:30:47,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254253741] [2022-01-18 05:30:47,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:47,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:30:47,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:47,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:30:47,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:30:47,205 INFO L87 Difference]: Start difference. First operand 1657 states and 5467 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:30:49,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:49,144 INFO L93 Difference]: Finished difference Result 2230 states and 7183 transitions. [2022-01-18 05:30:49,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 05:30:49,144 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:30:49,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:49,148 INFO L225 Difference]: With dead ends: 2230 [2022-01-18 05:30:49,148 INFO L226 Difference]: Without dead ends: 2226 [2022-01-18 05:30:49,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=451, Invalid=5099, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 05:30:49,149 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 262 mSDsluCounter, 1526 mSDsCounter, 0 mSdLazyCounter, 1862 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 3086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1149 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:49,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 231 Invalid, 3086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1862 Invalid, 0 Unknown, 1149 Unchecked, 0.7s Time] [2022-01-18 05:30:49,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2022-01-18 05:30:49,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1705. [2022-01-18 05:30:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.2822769953051645) internal successors, (5593), 1704 states have internal predecessors, (5593), 0 states have call successors, (0), 0 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 05:30:49,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 5593 transitions. [2022-01-18 05:30:49,172 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 5593 transitions. Word has length 24 [2022-01-18 05:30:49,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:49,173 INFO L470 AbstractCegarLoop]: Abstraction has 1705 states and 5593 transitions. [2022-01-18 05:30:49,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:30:49,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 5593 transitions. [2022-01-18 05:30:49,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:30:49,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:49,175 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] [2022-01-18 05:30:49,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-01-18 05:30:49,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:49,375 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:30:49,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:49,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1710035489, now seen corresponding path program 93 times [2022-01-18 05:30:49,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:49,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890646918] [2022-01-18 05:30:49,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:49,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:49,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:49,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890646918] [2022-01-18 05:30:49,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890646918] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:49,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268415226] [2022-01-18 05:30:49,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:30:49,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:49,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:49,580 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:30:49,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-01-18 05:30:49,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:30:49,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:49,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:30:49,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:49,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:49,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:49,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:49,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:49,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:30:49,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:49,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:50,157 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:30:50,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:30:50,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:50,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:50,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:50,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:50,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:30:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:50,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268415226] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:50,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:50,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:30:50,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988718674] [2022-01-18 05:30:50,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:50,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:30:50,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:50,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:30:50,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:30:50,213 INFO L87 Difference]: Start difference. First operand 1705 states and 5593 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:51,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:51,253 INFO L93 Difference]: Finished difference Result 2122 states and 6832 transitions. [2022-01-18 05:30:51,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 05:30:51,253 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:30:51,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:51,256 INFO L225 Difference]: With dead ends: 2122 [2022-01-18 05:30:51,257 INFO L226 Difference]: Without dead ends: 2115 [2022-01-18 05:30:51,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=190, Invalid=1880, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:30:51,257 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 149 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 1657 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 2418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 731 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:51,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 169 Invalid, 2418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1657 Invalid, 0 Unknown, 731 Unchecked, 0.6s Time] [2022-01-18 05:30:51,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2022-01-18 05:30:51,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1722. [2022-01-18 05:30:51,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1721 states have (on average 3.2783265543288787) internal successors, (5642), 1721 states have internal predecessors, (5642), 0 states have call successors, (0), 0 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 05:30:51,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 5642 transitions. [2022-01-18 05:30:51,279 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 5642 transitions. Word has length 24 [2022-01-18 05:30:51,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:51,279 INFO L470 AbstractCegarLoop]: Abstraction has 1722 states and 5642 transitions. [2022-01-18 05:30:51,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:51,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 5642 transitions. [2022-01-18 05:30:51,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:30:51,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:51,281 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] [2022-01-18 05:30:51,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-01-18 05:30:51,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:51,482 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:30:51,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:51,482 INFO L85 PathProgramCache]: Analyzing trace with hash -131973757, now seen corresponding path program 94 times [2022-01-18 05:30:51,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:51,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142534452] [2022-01-18 05:30:51,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:51,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:51,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:51,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142534452] [2022-01-18 05:30:51,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142534452] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:51,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730107194] [2022-01-18 05:30:51,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:30:51,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:51,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:51,689 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:30:51,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-01-18 05:30:51,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:30:51,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:51,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:30:51,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:51,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:51,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:51,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:51,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:51,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:30:52,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:52,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:52,227 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:30:52,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:30:52,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:52,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:52,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:52,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:52,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:30:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:52,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730107194] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:52,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:52,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:30:52,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116740008] [2022-01-18 05:30:52,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:52,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:30:52,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:52,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:30:52,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:30:52,293 INFO L87 Difference]: Start difference. First operand 1722 states and 5642 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:53,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:53,006 INFO L93 Difference]: Finished difference Result 2155 states and 7039 transitions. [2022-01-18 05:30:53,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 05:30:53,006 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:30:53,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:53,010 INFO L225 Difference]: With dead ends: 2155 [2022-01-18 05:30:53,010 INFO L226 Difference]: Without dead ends: 2149 [2022-01-18 05:30:53,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=1454, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 05:30:53,010 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 187 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1184 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:53,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 129 Invalid, 2291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1085 Invalid, 0 Unknown, 1184 Unchecked, 0.4s Time] [2022-01-18 05:30:53,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2022-01-18 05:30:53,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1710. [2022-01-18 05:30:53,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 3.2826214160327676) internal successors, (5610), 1709 states have internal predecessors, (5610), 0 states have call successors, (0), 0 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 05:30:53,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 5610 transitions. [2022-01-18 05:30:53,032 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 5610 transitions. Word has length 24 [2022-01-18 05:30:53,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:53,032 INFO L470 AbstractCegarLoop]: Abstraction has 1710 states and 5610 transitions. [2022-01-18 05:30:53,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:53,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 5610 transitions. [2022-01-18 05:30:53,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:30:53,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:53,034 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] [2022-01-18 05:30:53,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-01-18 05:30:53,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-01-18 05:30:53,234 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:30:53,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:53,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1017772037, now seen corresponding path program 95 times [2022-01-18 05:30:53,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:53,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412493752] [2022-01-18 05:30:53,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:53,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:53,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:53,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412493752] [2022-01-18 05:30:53,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412493752] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:53,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009246377] [2022-01-18 05:30:53,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:30:53,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:53,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:53,446 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:30:53,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-01-18 05:30:53,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:30:53,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:53,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:30:53,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:53,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:53,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:53,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:53,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:53,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:30:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:53,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:53,978 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:30:53,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:30:54,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:54,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:54,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:54,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:54,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:30:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:54,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009246377] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:54,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:54,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:30:54,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126102275] [2022-01-18 05:30:54,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:54,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:30:54,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:54,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:30:54,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:30:54,045 INFO L87 Difference]: Start difference. First operand 1710 states and 5610 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:54,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:54,755 INFO L93 Difference]: Finished difference Result 2050 states and 6701 transitions. [2022-01-18 05:30:54,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 05:30:54,755 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:30:54,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:54,758 INFO L225 Difference]: With dead ends: 2050 [2022-01-18 05:30:54,758 INFO L226 Difference]: Without dead ends: 2043 [2022-01-18 05:30:54,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 05:30:54,759 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 100 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:54,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 127 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1090 Invalid, 0 Unknown, 295 Unchecked, 0.4s Time] [2022-01-18 05:30:54,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2022-01-18 05:30:54,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1730. [2022-01-18 05:30:54,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 3.282244071717756) internal successors, (5675), 1729 states have internal predecessors, (5675), 0 states have call successors, (0), 0 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 05:30:54,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5675 transitions. [2022-01-18 05:30:54,780 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5675 transitions. Word has length 24 [2022-01-18 05:30:54,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:54,789 INFO L470 AbstractCegarLoop]: Abstraction has 1730 states and 5675 transitions. [2022-01-18 05:30:54,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:30:54,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5675 transitions. [2022-01-18 05:30:54,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:30:54,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:54,792 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] [2022-01-18 05:30:54,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-01-18 05:30:54,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:54,992 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:30:54,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:54,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1621884029, now seen corresponding path program 96 times [2022-01-18 05:30:54,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:54,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790469549] [2022-01-18 05:30:54,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:54,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:54,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:55,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:55,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790469549] [2022-01-18 05:30:55,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790469549] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:55,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963017311] [2022-01-18 05:30:55,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:30:55,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:55,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:55,206 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:30:55,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-01-18 05:30:55,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:30:55,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:55,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 05:30:55,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:55,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:55,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:55,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:55,718 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:30:55,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2022-01-18 05:30:55,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:55,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:56,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:56,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:56,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:56,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:56,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2022-01-18 05:30:56,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:56,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963017311] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:56,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:56,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-01-18 05:30:56,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705292502] [2022-01-18 05:30:56,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:56,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:30:56,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:56,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:30:56,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:30:56,587 INFO L87 Difference]: Start difference. First operand 1730 states and 5675 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:30:58,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:30:58,242 INFO L93 Difference]: Finished difference Result 2441 states and 7966 transitions. [2022-01-18 05:30:58,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 05:30:58,242 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:30:58,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:30:58,246 INFO L225 Difference]: With dead ends: 2441 [2022-01-18 05:30:58,246 INFO L226 Difference]: Without dead ends: 2432 [2022-01-18 05:30:58,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=665, Invalid=3891, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 05:30:58,247 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 268 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1732 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:30:58,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 159 Invalid, 2249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 503 Invalid, 0 Unknown, 1732 Unchecked, 0.2s Time] [2022-01-18 05:30:58,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2022-01-18 05:30:58,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 1815. [2022-01-18 05:30:58,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1814 states have (on average 3.2662624035281147) internal successors, (5925), 1814 states have internal predecessors, (5925), 0 states have call successors, (0), 0 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 05:30:58,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 5925 transitions. [2022-01-18 05:30:58,271 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 5925 transitions. Word has length 24 [2022-01-18 05:30:58,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:30:58,271 INFO L470 AbstractCegarLoop]: Abstraction has 1815 states and 5925 transitions. [2022-01-18 05:30:58,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:30:58,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 5925 transitions. [2022-01-18 05:30:58,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:30:58,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:30:58,273 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:30:58,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-01-18 05:30:58,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-01-18 05:30:58,474 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:30:58,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:30:58,474 INFO L85 PathProgramCache]: Analyzing trace with hash -2008343658, now seen corresponding path program 15 times [2022-01-18 05:30:58,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:30:58,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100837730] [2022-01-18 05:30:58,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:30:58,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:30:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:30:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:58,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:30:58,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100837730] [2022-01-18 05:30:58,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100837730] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:30:58,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35434701] [2022-01-18 05:30:58,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:30:58,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:30:58,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:30:58,689 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:30:58,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-01-18 05:30:58,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:30:58,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:30:58,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:30:58,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:30:59,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:59,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:30:59,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:59,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:59,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 05:30:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:59,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:30:59,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:30:59,504 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:30:59,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-01-18 05:30:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:30:59,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35434701] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:30:59,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:30:59,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-18 05:30:59,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662027594] [2022-01-18 05:30:59,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:30:59,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:30:59,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:30:59,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:30:59,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:30:59,602 INFO L87 Difference]: Start difference. First operand 1815 states and 5925 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:31:01,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:01,975 INFO L93 Difference]: Finished difference Result 2571 states and 8240 transitions. [2022-01-18 05:31:01,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 05:31:01,975 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:31:01,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:01,980 INFO L225 Difference]: With dead ends: 2571 [2022-01-18 05:31:01,980 INFO L226 Difference]: Without dead ends: 2561 [2022-01-18 05:31:01,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=531, Invalid=5321, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 05:31:01,980 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 233 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 1847 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 2901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 951 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:01,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 263 Invalid, 2901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1847 Invalid, 0 Unknown, 951 Unchecked, 0.7s Time] [2022-01-18 05:31:01,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2022-01-18 05:31:02,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 1846. [2022-01-18 05:31:02,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1845 states have (on average 3.2531165311653116) internal successors, (6002), 1845 states have internal predecessors, (6002), 0 states have call successors, (0), 0 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 05:31:02,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 6002 transitions. [2022-01-18 05:31:02,007 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 6002 transitions. Word has length 24 [2022-01-18 05:31:02,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:02,007 INFO L470 AbstractCegarLoop]: Abstraction has 1846 states and 6002 transitions. [2022-01-18 05:31:02,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:31:02,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 6002 transitions. [2022-01-18 05:31:02,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:31:02,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:02,009 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] [2022-01-18 05:31:02,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-01-18 05:31:02,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-01-18 05:31:02,210 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:31:02,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:02,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1008952667, now seen corresponding path program 97 times [2022-01-18 05:31:02,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:02,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021507603] [2022-01-18 05:31:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:02,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:02,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:02,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:02,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021507603] [2022-01-18 05:31:02,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021507603] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:02,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617498224] [2022-01-18 05:31:02,413 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:31:02,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:02,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:02,414 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:31:02,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-01-18 05:31:02,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:02,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:31:02,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:02,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:02,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:02,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:02,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:02,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:31:02,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:02,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:02,950 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:31:02,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:31:02,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:02,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:03,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:03,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:03,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:31:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:03,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617498224] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:03,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:03,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:31:03,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915640710] [2022-01-18 05:31:03,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:03,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:31:03,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:03,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:31:03,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:31:03,016 INFO L87 Difference]: Start difference. First operand 1846 states and 6002 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:03,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:03,655 INFO L93 Difference]: Finished difference Result 2249 states and 7227 transitions. [2022-01-18 05:31:03,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 05:31:03,656 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:31:03,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:03,659 INFO L225 Difference]: With dead ends: 2249 [2022-01-18 05:31:03,659 INFO L226 Difference]: Without dead ends: 2242 [2022-01-18 05:31:03,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 05:31:03,660 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 139 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 365 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:03,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 98 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 855 Invalid, 0 Unknown, 365 Unchecked, 0.3s Time] [2022-01-18 05:31:03,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2022-01-18 05:31:03,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 1858. [2022-01-18 05:31:03,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1857 states have (on average 3.253096392030156) internal successors, (6041), 1857 states have internal predecessors, (6041), 0 states have call successors, (0), 0 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 05:31:03,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 6041 transitions. [2022-01-18 05:31:03,683 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 6041 transitions. Word has length 24 [2022-01-18 05:31:03,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:03,683 INFO L470 AbstractCegarLoop]: Abstraction has 1858 states and 6041 transitions. [2022-01-18 05:31:03,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:03,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 6041 transitions. [2022-01-18 05:31:03,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:31:03,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:03,686 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] [2022-01-18 05:31:03,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-01-18 05:31:03,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:03,899 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:31:03,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:03,900 INFO L85 PathProgramCache]: Analyzing trace with hash -3739865, now seen corresponding path program 98 times [2022-01-18 05:31:03,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:03,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120178922] [2022-01-18 05:31:03,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:03,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:04,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:04,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:04,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120178922] [2022-01-18 05:31:04,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120178922] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:04,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241920227] [2022-01-18 05:31:04,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:31:04,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:04,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:04,117 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:31:04,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-01-18 05:31:04,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:31:04,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:04,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:31:04,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:04,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:04,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:04,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:04,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:31:04,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 05:31:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:04,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:05,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:05,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:05,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:31:05,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:31:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:05,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241920227] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:05,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:05,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:31:05,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222821597] [2022-01-18 05:31:05,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:05,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:31:05,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:05,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:31:05,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:31:05,197 INFO L87 Difference]: Start difference. First operand 1858 states and 6041 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:31:06,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:06,822 INFO L93 Difference]: Finished difference Result 2943 states and 9800 transitions. [2022-01-18 05:31:06,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 05:31:06,822 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:31:06,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:06,828 INFO L225 Difference]: With dead ends: 2943 [2022-01-18 05:31:06,828 INFO L226 Difference]: Without dead ends: 2933 [2022-01-18 05:31:06,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=456, Invalid=2850, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 05:31:06,828 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 144 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1166 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:06,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 183 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 535 Invalid, 0 Unknown, 1166 Unchecked, 0.2s Time] [2022-01-18 05:31:06,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2933 states. [2022-01-18 05:31:06,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2933 to 1873. [2022-01-18 05:31:06,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 3.2542735042735043) internal successors, (6092), 1872 states have internal predecessors, (6092), 0 states have call successors, (0), 0 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 05:31:06,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 6092 transitions. [2022-01-18 05:31:06,856 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 6092 transitions. Word has length 24 [2022-01-18 05:31:06,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:06,856 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 6092 transitions. [2022-01-18 05:31:06,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:31:06,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 6092 transitions. [2022-01-18 05:31:06,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:31:06,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:06,859 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] [2022-01-18 05:31:06,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-01-18 05:31:07,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2022-01-18 05:31:07,059 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:31:07,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:07,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1310540155, now seen corresponding path program 99 times [2022-01-18 05:31:07,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:07,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299664144] [2022-01-18 05:31:07,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:07,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:07,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:07,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:07,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:07,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299664144] [2022-01-18 05:31:07,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299664144] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:07,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897384060] [2022-01-18 05:31:07,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:31:07,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:07,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:07,325 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:31:07,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-01-18 05:31:07,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:31:07,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:07,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:31:07,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:07,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:07,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:07,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:07,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:07,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-01-18 05:31:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:07,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:08,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:08,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:31:08,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-01-18 05:31:08,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:08,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897384060] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:08,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:08,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:31:08,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510582164] [2022-01-18 05:31:08,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:08,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:31:08,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:08,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:31:08,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:31:08,181 INFO L87 Difference]: Start difference. First operand 1873 states and 6092 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:09,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:09,288 INFO L93 Difference]: Finished difference Result 2232 states and 7157 transitions. [2022-01-18 05:31:09,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 05:31:09,289 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:31:09,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:09,292 INFO L225 Difference]: With dead ends: 2232 [2022-01-18 05:31:09,293 INFO L226 Difference]: Without dead ends: 2226 [2022-01-18 05:31:09,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 05:31:09,293 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 115 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 689 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:09,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 148 Invalid, 2024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1310 Invalid, 0 Unknown, 689 Unchecked, 0.5s Time] [2022-01-18 05:31:09,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2022-01-18 05:31:09,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1877. [2022-01-18 05:31:09,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 3.2510660980810235) internal successors, (6099), 1876 states have internal predecessors, (6099), 0 states have call successors, (0), 0 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 05:31:09,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 6099 transitions. [2022-01-18 05:31:09,316 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 6099 transitions. Word has length 24 [2022-01-18 05:31:09,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:09,316 INFO L470 AbstractCegarLoop]: Abstraction has 1877 states and 6099 transitions. [2022-01-18 05:31:09,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:09,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 6099 transitions. [2022-01-18 05:31:09,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:31:09,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:09,318 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] [2022-01-18 05:31:09,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-01-18 05:31:09,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:09,518 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:31:09,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:09,519 INFO L85 PathProgramCache]: Analyzing trace with hash 230032295, now seen corresponding path program 100 times [2022-01-18 05:31:09,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:09,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202837106] [2022-01-18 05:31:09,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:09,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:09,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:09,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:09,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202837106] [2022-01-18 05:31:09,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202837106] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:09,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147142603] [2022-01-18 05:31:09,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:31:09,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:09,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:09,737 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:31:09,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-01-18 05:31:09,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:31:09,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:09,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:31:09,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:09,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:09,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:09,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:09,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:09,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:31:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:10,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:10,291 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:31:10,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:31:10,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:10,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:10,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:10,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:10,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:31:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:10,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147142603] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:10,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:10,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:31:10,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667904207] [2022-01-18 05:31:10,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:10,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:31:10,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:10,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:31:10,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:31:10,346 INFO L87 Difference]: Start difference. First operand 1877 states and 6099 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:11,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:11,390 INFO L93 Difference]: Finished difference Result 2214 states and 7180 transitions. [2022-01-18 05:31:11,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 05:31:11,390 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:31:11,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:11,394 INFO L225 Difference]: With dead ends: 2214 [2022-01-18 05:31:11,394 INFO L226 Difference]: Without dead ends: 2204 [2022-01-18 05:31:11,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=165, Invalid=1641, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 05:31:11,394 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 134 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 654 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:11,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 65 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1304 Invalid, 0 Unknown, 654 Unchecked, 0.5s Time] [2022-01-18 05:31:11,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2022-01-18 05:31:11,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1893. [2022-01-18 05:31:11,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 3.2510570824524314) internal successors, (6151), 1892 states have internal predecessors, (6151), 0 states have call successors, (0), 0 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 05:31:11,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 6151 transitions. [2022-01-18 05:31:11,418 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 6151 transitions. Word has length 24 [2022-01-18 05:31:11,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:11,418 INFO L470 AbstractCegarLoop]: Abstraction has 1893 states and 6151 transitions. [2022-01-18 05:31:11,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:11,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 6151 transitions. [2022-01-18 05:31:11,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:31:11,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:11,420 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] [2022-01-18 05:31:11,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-01-18 05:31:11,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:11,621 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:31:11,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:11,621 INFO L85 PathProgramCache]: Analyzing trace with hash 715549660, now seen corresponding path program 6 times [2022-01-18 05:31:11,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:11,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104742434] [2022-01-18 05:31:11,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:11,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:11,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:11,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104742434] [2022-01-18 05:31:11,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104742434] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:11,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544353748] [2022-01-18 05:31:11,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:31:11,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:11,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:11,855 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:31:11,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-01-18 05:31:11,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:31:11,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:11,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 05:31:11,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:12,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:12,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:12,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:12,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:31:12,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2022-01-18 05:31:12,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:12,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:13,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:13,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:13,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:13,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:13,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2022-01-18 05:31:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:13,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544353748] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:13,228 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:13,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-01-18 05:31:13,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202965145] [2022-01-18 05:31:13,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:13,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:31:13,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:13,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:31:13,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:31:13,229 INFO L87 Difference]: Start difference. First operand 1893 states and 6151 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:31:13,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:13,886 INFO L93 Difference]: Finished difference Result 2227 states and 7098 transitions. [2022-01-18 05:31:13,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 05:31:13,886 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:31:13,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:13,890 INFO L225 Difference]: With dead ends: 2227 [2022-01-18 05:31:13,891 INFO L226 Difference]: Without dead ends: 2225 [2022-01-18 05:31:13,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=333, Invalid=1923, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 05:31:13,891 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 108 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 524 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:13,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 129 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 215 Invalid, 0 Unknown, 524 Unchecked, 0.1s Time] [2022-01-18 05:31:13,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2022-01-18 05:31:13,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1964. [2022-01-18 05:31:13,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 3.247580234335201) internal successors, (6375), 1963 states have internal predecessors, (6375), 0 states have call successors, (0), 0 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 05:31:13,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 6375 transitions. [2022-01-18 05:31:13,916 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 6375 transitions. Word has length 24 [2022-01-18 05:31:13,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:13,917 INFO L470 AbstractCegarLoop]: Abstraction has 1964 states and 6375 transitions. [2022-01-18 05:31:13,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:31:13,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 6375 transitions. [2022-01-18 05:31:13,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:31:13,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:13,919 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] [2022-01-18 05:31:13,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-01-18 05:31:14,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:14,120 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:31:14,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:14,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1105807064, now seen corresponding path program 7 times [2022-01-18 05:31:14,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:14,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863587500] [2022-01-18 05:31:14,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:14,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:14,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:14,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863587500] [2022-01-18 05:31:14,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863587500] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:14,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004894004] [2022-01-18 05:31:14,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:31:14,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:14,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:14,339 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:31:14,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-01-18 05:31:14,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:14,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:31:14,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:14,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:14,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:14,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:14,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:14,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:31:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:14,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:14,881 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:31:14,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:31:14,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:14,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:14,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:14,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:14,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:31:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:14,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004894004] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:14,936 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:14,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:31:14,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064484516] [2022-01-18 05:31:14,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:14,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:31:14,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:14,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:31:14,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:31:14,936 INFO L87 Difference]: Start difference. First operand 1964 states and 6375 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:31:15,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:15,712 INFO L93 Difference]: Finished difference Result 2382 states and 7597 transitions. [2022-01-18 05:31:15,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 05:31:15,712 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:31:15,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:15,716 INFO L225 Difference]: With dead ends: 2382 [2022-01-18 05:31:15,716 INFO L226 Difference]: Without dead ends: 2377 [2022-01-18 05:31:15,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 05:31:15,716 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 103 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 290 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:15,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 162 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1288 Invalid, 0 Unknown, 290 Unchecked, 0.5s Time] [2022-01-18 05:31:15,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2022-01-18 05:31:15,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 1965. [2022-01-18 05:31:15,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 3.24847250509165) internal successors, (6380), 1964 states have internal predecessors, (6380), 0 states have call successors, (0), 0 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 05:31:15,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 6380 transitions. [2022-01-18 05:31:15,741 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 6380 transitions. Word has length 24 [2022-01-18 05:31:15,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:15,741 INFO L470 AbstractCegarLoop]: Abstraction has 1965 states and 6380 transitions. [2022-01-18 05:31:15,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:31:15,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 6380 transitions. [2022-01-18 05:31:15,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:31:15,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:15,743 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] [2022-01-18 05:31:15,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-01-18 05:31:15,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:15,944 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:31:15,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:15,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1091904803, now seen corresponding path program 1 times [2022-01-18 05:31:15,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:15,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358630415] [2022-01-18 05:31:15,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:15,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:16,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:16,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358630415] [2022-01-18 05:31:16,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358630415] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:16,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429267521] [2022-01-18 05:31:16,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:16,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:16,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:16,193 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:31:16,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-01-18 05:31:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:16,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:31:16,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:16,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:16,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:16,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:16,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:16,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:31:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:16,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:16,726 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:31:16,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:31:16,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:16,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:16,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:16,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:16,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:31:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:16,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429267521] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:16,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:16,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:31:16,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990741815] [2022-01-18 05:31:16,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:16,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:31:16,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:16,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:31:16,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:31:16,781 INFO L87 Difference]: Start difference. First operand 1965 states and 6380 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:17,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:17,592 INFO L93 Difference]: Finished difference Result 2285 states and 7368 transitions. [2022-01-18 05:31:17,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 05:31:17,592 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:31:17,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:17,595 INFO L225 Difference]: With dead ends: 2285 [2022-01-18 05:31:17,595 INFO L226 Difference]: Without dead ends: 2281 [2022-01-18 05:31:17,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=211, Invalid=1769, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 05:31:17,596 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 77 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:17,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 162 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 925 Invalid, 0 Unknown, 272 Unchecked, 0.4s Time] [2022-01-18 05:31:17,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2022-01-18 05:31:17,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1963. [2022-01-18 05:31:17,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 3.2487257900101936) internal successors, (6374), 1962 states have internal predecessors, (6374), 0 states have call successors, (0), 0 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 05:31:17,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 6374 transitions. [2022-01-18 05:31:17,618 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 6374 transitions. Word has length 24 [2022-01-18 05:31:17,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:17,618 INFO L470 AbstractCegarLoop]: Abstraction has 1963 states and 6374 transitions. [2022-01-18 05:31:17,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:17,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 6374 transitions. [2022-01-18 05:31:17,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:31:17,621 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:17,621 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] [2022-01-18 05:31:17,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-01-18 05:31:17,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:17,821 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:31:17,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:17,822 INFO L85 PathProgramCache]: Analyzing trace with hash -297142872, now seen corresponding path program 8 times [2022-01-18 05:31:17,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:17,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15805461] [2022-01-18 05:31:17,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:17,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:18,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:18,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15805461] [2022-01-18 05:31:18,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15805461] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:18,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420239010] [2022-01-18 05:31:18,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:31:18,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:18,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:18,036 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:31:18,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-01-18 05:31:18,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:31:18,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:18,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:31:18,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:18,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:18,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:18,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:18,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:31:18,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 05:31:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:18,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:18,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:19,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:19,012 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:31:19,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:31:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:19,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420239010] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:19,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:19,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:31:19,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296275469] [2022-01-18 05:31:19,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:19,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:31:19,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:19,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:31:19,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:31:19,119 INFO L87 Difference]: Start difference. First operand 1963 states and 6374 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:31:21,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:21,283 INFO L93 Difference]: Finished difference Result 3351 states and 11150 transitions. [2022-01-18 05:31:21,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 05:31:21,284 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:31:21,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:21,289 INFO L225 Difference]: With dead ends: 3351 [2022-01-18 05:31:21,290 INFO L226 Difference]: Without dead ends: 3341 [2022-01-18 05:31:21,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=576, Invalid=3456, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 05:31:21,290 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 179 mSDsluCounter, 1541 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 2885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1809 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:21,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 314 Invalid, 2885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1027 Invalid, 0 Unknown, 1809 Unchecked, 0.4s Time] [2022-01-18 05:31:21,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3341 states. [2022-01-18 05:31:21,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3341 to 2001. [2022-01-18 05:31:21,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2001 states, 2000 states have (on average 3.249) internal successors, (6498), 2000 states have internal predecessors, (6498), 0 states have call successors, (0), 0 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 05:31:21,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 6498 transitions. [2022-01-18 05:31:21,321 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 6498 transitions. Word has length 24 [2022-01-18 05:31:21,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:21,322 INFO L470 AbstractCegarLoop]: Abstraction has 2001 states and 6498 transitions. [2022-01-18 05:31:21,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:31:21,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 6498 transitions. [2022-01-18 05:31:21,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:31:21,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:21,324 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] [2022-01-18 05:31:21,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-01-18 05:31:21,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:21,524 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:31:21,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:21,525 INFO L85 PathProgramCache]: Analyzing trace with hash -2104597335, now seen corresponding path program 2 times [2022-01-18 05:31:21,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:21,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991634922] [2022-01-18 05:31:21,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:21,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:21,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:21,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:21,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991634922] [2022-01-18 05:31:21,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991634922] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:21,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400168486] [2022-01-18 05:31:21,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:31:21,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:21,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:21,738 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:31:21,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-01-18 05:31:21,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:31:21,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:21,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:31:21,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:22,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:22,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:22,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:22,052 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:31:22,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 05:31:22,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:22,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:22,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:22,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:22,675 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:31:22,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:31:22,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:22,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400168486] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:22,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:22,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:31:22,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013589590] [2022-01-18 05:31:22,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:22,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:31:22,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:22,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:31:22,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:31:22,785 INFO L87 Difference]: Start difference. First operand 2001 states and 6498 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:31:23,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:23,829 INFO L93 Difference]: Finished difference Result 2462 states and 8050 transitions. [2022-01-18 05:31:23,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 05:31:23,830 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:31:23,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:23,834 INFO L225 Difference]: With dead ends: 2462 [2022-01-18 05:31:23,834 INFO L226 Difference]: Without dead ends: 2454 [2022-01-18 05:31:23,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=296, Invalid=1774, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:31:23,834 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 113 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 743 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:23,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 176 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 582 Invalid, 0 Unknown, 743 Unchecked, 0.2s Time] [2022-01-18 05:31:23,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2022-01-18 05:31:23,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 2003. [2022-01-18 05:31:23,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 3.247752247752248) internal successors, (6502), 2002 states have internal predecessors, (6502), 0 states have call successors, (0), 0 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 05:31:23,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 6502 transitions. [2022-01-18 05:31:23,860 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 6502 transitions. Word has length 24 [2022-01-18 05:31:23,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:23,860 INFO L470 AbstractCegarLoop]: Abstraction has 2003 states and 6502 transitions. [2022-01-18 05:31:23,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:31:23,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 6502 transitions. [2022-01-18 05:31:23,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:31:23,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:23,862 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] [2022-01-18 05:31:23,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-01-18 05:31:24,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-01-18 05:31:24,063 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:31:24,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:24,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1017137148, now seen corresponding path program 9 times [2022-01-18 05:31:24,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:24,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174528813] [2022-01-18 05:31:24,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:24,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:24,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:24,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174528813] [2022-01-18 05:31:24,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174528813] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:24,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140329451] [2022-01-18 05:31:24,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:31:24,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:24,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:24,280 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:31:24,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-01-18 05:31:24,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:31:24,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:24,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:31:24,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:24,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:24,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:24,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:24,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:24,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 05:31:24,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:24,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:25,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:25,023 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:31:25,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-01-18 05:31:25,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:25,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140329451] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:25,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:25,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:31:25,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104887302] [2022-01-18 05:31:25,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:25,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:31:25,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:25,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:31:25,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:31:25,127 INFO L87 Difference]: Start difference. First operand 2003 states and 6502 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:25,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:25,972 INFO L93 Difference]: Finished difference Result 2324 states and 7479 transitions. [2022-01-18 05:31:25,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 05:31:25,972 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:31:25,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:25,976 INFO L225 Difference]: With dead ends: 2324 [2022-01-18 05:31:25,976 INFO L226 Difference]: Without dead ends: 2319 [2022-01-18 05:31:25,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=1201, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 05:31:25,977 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 96 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 2199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 821 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:25,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 141 Invalid, 2199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1354 Invalid, 0 Unknown, 821 Unchecked, 0.5s Time] [2022-01-18 05:31:25,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2022-01-18 05:31:25,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 2002. [2022-01-18 05:31:25,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 2001 states have (on average 3.2478760619690155) internal successors, (6499), 2001 states have internal predecessors, (6499), 0 states have call successors, (0), 0 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 05:31:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 6499 transitions. [2022-01-18 05:31:26,001 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 6499 transitions. Word has length 24 [2022-01-18 05:31:26,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:26,001 INFO L470 AbstractCegarLoop]: Abstraction has 2002 states and 6499 transitions. [2022-01-18 05:31:26,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:26,002 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 6499 transitions. [2022-01-18 05:31:26,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:31:26,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:26,004 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] [2022-01-18 05:31:26,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-01-18 05:31:26,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-01-18 05:31:26,204 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:31:26,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:26,205 INFO L85 PathProgramCache]: Analyzing trace with hash -516236142, now seen corresponding path program 16 times [2022-01-18 05:31:26,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:26,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478088758] [2022-01-18 05:31:26,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:26,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:26,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:26,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478088758] [2022-01-18 05:31:26,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478088758] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:26,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804726475] [2022-01-18 05:31:26,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:31:26,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:26,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:26,412 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:31:26,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-01-18 05:31:26,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:31:26,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:26,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:31:26,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:26,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:26,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:26,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:26,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:26,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:31:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:26,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:26,942 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:31:26,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:31:26,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:26,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:26,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:26,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:26,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:31:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:26,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804726475] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:26,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:26,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:31:26,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060069493] [2022-01-18 05:31:26,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:26,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:31:26,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:26,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:31:26,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:31:26,995 INFO L87 Difference]: Start difference. First operand 2002 states and 6499 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:27,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:27,839 INFO L93 Difference]: Finished difference Result 2438 states and 7772 transitions. [2022-01-18 05:31:27,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 05:31:27,839 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:31:27,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:27,843 INFO L225 Difference]: With dead ends: 2438 [2022-01-18 05:31:27,843 INFO L226 Difference]: Without dead ends: 2433 [2022-01-18 05:31:27,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 05:31:27,843 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 119 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:27,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 158 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1180 Invalid, 0 Unknown, 375 Unchecked, 0.4s Time] [2022-01-18 05:31:27,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2022-01-18 05:31:27,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 2003. [2022-01-18 05:31:27,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 3.2472527472527473) internal successors, (6501), 2002 states have internal predecessors, (6501), 0 states have call successors, (0), 0 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 05:31:27,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 6501 transitions. [2022-01-18 05:31:27,868 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 6501 transitions. Word has length 24 [2022-01-18 05:31:27,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:27,868 INFO L470 AbstractCegarLoop]: Abstraction has 2003 states and 6501 transitions. [2022-01-18 05:31:27,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:27,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 6501 transitions. [2022-01-18 05:31:27,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:31:27,871 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:27,871 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] [2022-01-18 05:31:27,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-01-18 05:31:28,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-01-18 05:31:28,071 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:31:28,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:28,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1528928674, now seen corresponding path program 17 times [2022-01-18 05:31:28,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:28,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933950341] [2022-01-18 05:31:28,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:28,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:28,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:28,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:28,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933950341] [2022-01-18 05:31:28,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933950341] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:28,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305592330] [2022-01-18 05:31:28,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:31:28,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:28,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:28,283 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:31:28,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-01-18 05:31:28,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:31:28,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:28,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:31:28,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:28,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:28,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:28,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:28,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:28,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:31:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:28,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:28,822 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:31:28,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:31:28,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:28,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:28,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:28,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:28,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:31:28,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:28,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305592330] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:28,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:28,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:31:28,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410952135] [2022-01-18 05:31:28,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:28,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:31:28,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:28,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:31:28,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:31:28,890 INFO L87 Difference]: Start difference. First operand 2003 states and 6501 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:30,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:30,028 INFO L93 Difference]: Finished difference Result 2506 states and 8053 transitions. [2022-01-18 05:31:30,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 05:31:30,028 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:31:30,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:30,032 INFO L225 Difference]: With dead ends: 2506 [2022-01-18 05:31:30,033 INFO L226 Difference]: Without dead ends: 2499 [2022-01-18 05:31:30,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=243, Invalid=1737, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 05:31:30,033 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 195 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 778 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:30,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 161 Invalid, 2325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1502 Invalid, 0 Unknown, 778 Unchecked, 0.6s Time] [2022-01-18 05:31:30,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2022-01-18 05:31:30,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 1997. [2022-01-18 05:31:30,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1997 states, 1996 states have (on average 3.2600200400801604) internal successors, (6507), 1996 states have internal predecessors, (6507), 0 states have call successors, (0), 0 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 05:31:30,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1997 states to 1997 states and 6507 transitions. [2022-01-18 05:31:30,074 INFO L78 Accepts]: Start accepts. Automaton has 1997 states and 6507 transitions. Word has length 24 [2022-01-18 05:31:30,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:30,074 INFO L470 AbstractCegarLoop]: Abstraction has 1997 states and 6507 transitions. [2022-01-18 05:31:30,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:30,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1997 states and 6507 transitions. [2022-01-18 05:31:30,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:31:30,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:30,077 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] [2022-01-18 05:31:30,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-01-18 05:31:30,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:30,277 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:31:30,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:30,278 INFO L85 PathProgramCache]: Analyzing trace with hash -387153423, now seen corresponding path program 3 times [2022-01-18 05:31:30,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:30,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057664227] [2022-01-18 05:31:30,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:30,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:30,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:30,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:30,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057664227] [2022-01-18 05:31:30,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057664227] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:30,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611923437] [2022-01-18 05:31:30,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:31:30,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:30,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:30,481 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:31:30,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-01-18 05:31:30,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:31:30,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:30,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:31:30,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:30,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:30,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:30,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:30,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:30,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 05:31:30,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:30,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:31,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:31,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:31:31,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-01-18 05:31:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:31,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611923437] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:31,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:31,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-18 05:31:31,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796622951] [2022-01-18 05:31:31,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:31,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:31:31,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:31,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:31:31,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:31:31,485 INFO L87 Difference]: Start difference. First operand 1997 states and 6507 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:31:33,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:33,973 INFO L93 Difference]: Finished difference Result 2682 states and 8625 transitions. [2022-01-18 05:31:33,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 05:31:33,974 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:31:33,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:33,978 INFO L225 Difference]: With dead ends: 2682 [2022-01-18 05:31:33,978 INFO L226 Difference]: Without dead ends: 2673 [2022-01-18 05:31:33,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1662 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=541, Invalid=5939, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 05:31:33,979 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 159 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 2447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 732 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:33,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 235 Invalid, 2447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1633 Invalid, 0 Unknown, 732 Unchecked, 0.7s Time] [2022-01-18 05:31:33,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2022-01-18 05:31:34,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 2019. [2022-01-18 05:31:34,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 2018 states have (on average 3.2547076313181367) internal successors, (6568), 2018 states have internal predecessors, (6568), 0 states have call successors, (0), 0 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 05:31:34,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 6568 transitions. [2022-01-18 05:31:34,006 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 6568 transitions. Word has length 24 [2022-01-18 05:31:34,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:34,006 INFO L470 AbstractCegarLoop]: Abstraction has 2019 states and 6568 transitions. [2022-01-18 05:31:34,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:31:34,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 6568 transitions. [2022-01-18 05:31:34,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:31:34,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:34,008 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] [2022-01-18 05:31:34,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-01-18 05:31:34,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:34,209 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:31:34,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:34,209 INFO L85 PathProgramCache]: Analyzing trace with hash 856297860, now seen corresponding path program 10 times [2022-01-18 05:31:34,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:34,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105797260] [2022-01-18 05:31:34,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:34,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:34,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:34,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:34,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105797260] [2022-01-18 05:31:34,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105797260] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:34,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758068289] [2022-01-18 05:31:34,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:31:34,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:34,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:34,411 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:31:34,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-01-18 05:31:34,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:31:34,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:34,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:31:34,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:34,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:34,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:34,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:34,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:34,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:31:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:34,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:34,954 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:31:34,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:31:35,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:35,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:35,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:35,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:35,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:31:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:35,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758068289] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:35,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:35,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:31:35,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352788544] [2022-01-18 05:31:35,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:35,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:31:35,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:35,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:31:35,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:31:35,020 INFO L87 Difference]: Start difference. First operand 2019 states and 6568 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:35,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:35,781 INFO L93 Difference]: Finished difference Result 2425 states and 7756 transitions. [2022-01-18 05:31:35,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 05:31:35,781 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:31:35,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:35,785 INFO L225 Difference]: With dead ends: 2425 [2022-01-18 05:31:35,785 INFO L226 Difference]: Without dead ends: 2420 [2022-01-18 05:31:35,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 05:31:35,785 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 118 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:35,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 113 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1036 Invalid, 0 Unknown, 303 Unchecked, 0.4s Time] [2022-01-18 05:31:35,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2022-01-18 05:31:35,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 2020. [2022-01-18 05:31:35,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2019 states have (on average 3.254581475978207) internal successors, (6571), 2019 states have internal predecessors, (6571), 0 states have call successors, (0), 0 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 05:31:35,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 6571 transitions. [2022-01-18 05:31:35,810 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 6571 transitions. Word has length 24 [2022-01-18 05:31:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:35,810 INFO L470 AbstractCegarLoop]: Abstraction has 2020 states and 6571 transitions. [2022-01-18 05:31:35,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:35,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 6571 transitions. [2022-01-18 05:31:35,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:31:35,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:35,813 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] [2022-01-18 05:31:35,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-01-18 05:31:36,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-01-18 05:31:36,013 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:31:36,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:36,014 INFO L85 PathProgramCache]: Analyzing trace with hash -799013370, now seen corresponding path program 11 times [2022-01-18 05:31:36,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:36,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419011158] [2022-01-18 05:31:36,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:36,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:36,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:36,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419011158] [2022-01-18 05:31:36,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419011158] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:36,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322725271] [2022-01-18 05:31:36,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:31:36,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:36,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:36,216 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:31:36,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-01-18 05:31:36,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:31:36,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:36,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:31:36,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:36,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:36,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:36,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:36,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:36,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:31:36,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:36,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:36,751 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:31:36,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:31:36,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:36,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:36,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:36,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:36,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:31:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:36,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322725271] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:36,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:36,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:31:36,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610949148] [2022-01-18 05:31:36,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:36,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:31:36,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:36,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:31:36,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:31:36,816 INFO L87 Difference]: Start difference. First operand 2020 states and 6571 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:37,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:37,673 INFO L93 Difference]: Finished difference Result 2712 states and 8738 transitions. [2022-01-18 05:31:37,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 05:31:37,673 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:31:37,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:37,678 INFO L225 Difference]: With dead ends: 2712 [2022-01-18 05:31:37,678 INFO L226 Difference]: Without dead ends: 2705 [2022-01-18 05:31:37,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=202, Invalid=1438, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 05:31:37,678 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 171 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 558 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:37,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 214 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1170 Invalid, 0 Unknown, 558 Unchecked, 0.5s Time] [2022-01-18 05:31:37,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2022-01-18 05:31:37,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 2027. [2022-01-18 05:31:37,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 3.25715695952616) internal successors, (6599), 2026 states have internal predecessors, (6599), 0 states have call successors, (0), 0 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 05:31:37,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 6599 transitions. [2022-01-18 05:31:37,705 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 6599 transitions. Word has length 24 [2022-01-18 05:31:37,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:37,706 INFO L470 AbstractCegarLoop]: Abstraction has 2027 states and 6599 transitions. [2022-01-18 05:31:37,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:37,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 6599 transitions. [2022-01-18 05:31:37,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:31:37,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:37,708 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] [2022-01-18 05:31:37,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-01-18 05:31:37,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:37,924 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:31:37,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:37,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1411944732, now seen corresponding path program 12 times [2022-01-18 05:31:37,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:37,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583965219] [2022-01-18 05:31:37,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:37,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:38,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:38,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:38,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583965219] [2022-01-18 05:31:38,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583965219] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:38,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444761090] [2022-01-18 05:31:38,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:31:38,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:38,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:38,135 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:31:38,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-01-18 05:31:38,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:31:38,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:38,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 05:31:38,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:38,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:38,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:38,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:38,653 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:31:38,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2022-01-18 05:31:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:38,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:39,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:39,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:39,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:39,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:39,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2022-01-18 05:31:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:39,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444761090] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:39,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:39,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-01-18 05:31:39,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081565885] [2022-01-18 05:31:39,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:39,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:31:39,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:39,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:31:39,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:31:39,526 INFO L87 Difference]: Start difference. First operand 2027 states and 6599 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:31:40,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:40,568 INFO L93 Difference]: Finished difference Result 2393 states and 7634 transitions. [2022-01-18 05:31:40,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 05:31:40,568 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:31:40,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:40,572 INFO L225 Difference]: With dead ends: 2393 [2022-01-18 05:31:40,572 INFO L226 Difference]: Without dead ends: 2389 [2022-01-18 05:31:40,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=463, Invalid=2843, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 05:31:40,573 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 147 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 924 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:40,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 169 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 355 Invalid, 0 Unknown, 924 Unchecked, 0.1s Time] [2022-01-18 05:31:40,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2022-01-18 05:31:40,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 2070. [2022-01-18 05:31:40,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 2069 states have (on average 3.252779120347994) internal successors, (6730), 2069 states have internal predecessors, (6730), 0 states have call successors, (0), 0 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 05:31:40,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 6730 transitions. [2022-01-18 05:31:40,599 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 6730 transitions. Word has length 24 [2022-01-18 05:31:40,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:40,599 INFO L470 AbstractCegarLoop]: Abstraction has 2070 states and 6730 transitions. [2022-01-18 05:31:40,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:31:40,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 6730 transitions. [2022-01-18 05:31:40,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:31:40,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:40,602 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] [2022-01-18 05:31:40,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-01-18 05:31:40,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:40,802 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:31:40,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:40,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1021687328, now seen corresponding path program 13 times [2022-01-18 05:31:40,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:40,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318190001] [2022-01-18 05:31:40,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:40,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:41,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:41,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:41,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318190001] [2022-01-18 05:31:41,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318190001] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:41,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597398923] [2022-01-18 05:31:41,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:31:41,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:41,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:41,004 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:31:41,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-01-18 05:31:41,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:41,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:31:41,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:41,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:41,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:41,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:41,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:41,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:31:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:41,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:41,530 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:31:41,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:31:41,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:41,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:41,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:41,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:41,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:31:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:41,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597398923] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:41,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:41,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:31:41,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785815324] [2022-01-18 05:31:41,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:41,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:31:41,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:41,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:31:41,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:31:41,584 INFO L87 Difference]: Start difference. First operand 2070 states and 6730 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:31:42,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:42,316 INFO L93 Difference]: Finished difference Result 2491 states and 8001 transitions. [2022-01-18 05:31:42,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 05:31:42,317 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:31:42,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:42,321 INFO L225 Difference]: With dead ends: 2491 [2022-01-18 05:31:42,321 INFO L226 Difference]: Without dead ends: 2485 [2022-01-18 05:31:42,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 05:31:42,321 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 142 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 629 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:42,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 122 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1072 Invalid, 0 Unknown, 629 Unchecked, 0.4s Time] [2022-01-18 05:31:42,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2022-01-18 05:31:42,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 2064. [2022-01-18 05:31:42,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 3.256907416383907) internal successors, (6719), 2063 states have internal predecessors, (6719), 0 states have call successors, (0), 0 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 05:31:42,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 6719 transitions. [2022-01-18 05:31:42,347 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 6719 transitions. Word has length 24 [2022-01-18 05:31:42,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:42,347 INFO L470 AbstractCegarLoop]: Abstraction has 2064 states and 6719 transitions. [2022-01-18 05:31:42,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:31:42,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 6719 transitions. [2022-01-18 05:31:42,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:31:42,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:42,350 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] [2022-01-18 05:31:42,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-01-18 05:31:42,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2022-01-18 05:31:42,550 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:31:42,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:42,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1722611165, now seen corresponding path program 101 times [2022-01-18 05:31:42,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:42,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742171519] [2022-01-18 05:31:42,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:42,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:42,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:42,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742171519] [2022-01-18 05:31:42,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742171519] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:42,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895724896] [2022-01-18 05:31:42,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:31:42,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:42,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:42,773 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:31:42,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-01-18 05:31:42,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:31:42,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:42,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:31:42,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:43,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:43,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:43,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:43,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:43,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:31:43,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:43,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:43,318 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:31:43,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:31:43,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:43,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:43,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:43,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:43,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:31:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:43,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895724896] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:43,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:43,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:31:43,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899462176] [2022-01-18 05:31:43,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:43,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:31:43,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:43,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:31:43,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:31:43,386 INFO L87 Difference]: Start difference. First operand 2064 states and 6719 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:44,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:44,329 INFO L93 Difference]: Finished difference Result 2348 states and 7639 transitions. [2022-01-18 05:31:44,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 05:31:44,330 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:31:44,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:44,334 INFO L225 Difference]: With dead ends: 2348 [2022-01-18 05:31:44,334 INFO L226 Difference]: Without dead ends: 2342 [2022-01-18 05:31:44,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 05:31:44,334 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 91 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:44,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 65 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1081 Invalid, 0 Unknown, 266 Unchecked, 0.4s Time] [2022-01-18 05:31:44,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2022-01-18 05:31:44,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 2062. [2022-01-18 05:31:44,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 3.2581271227559436) internal successors, (6715), 2061 states have internal predecessors, (6715), 0 states have call successors, (0), 0 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 05:31:44,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 6715 transitions. [2022-01-18 05:31:44,359 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 6715 transitions. Word has length 24 [2022-01-18 05:31:44,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:44,359 INFO L470 AbstractCegarLoop]: Abstraction has 2062 states and 6715 transitions. [2022-01-18 05:31:44,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:44,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 6715 transitions. [2022-01-18 05:31:44,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:31:44,362 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:44,362 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] [2022-01-18 05:31:44,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-01-18 05:31:44,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:44,562 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:31:44,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:44,563 INFO L85 PathProgramCache]: Analyzing trace with hash 775404772, now seen corresponding path program 14 times [2022-01-18 05:31:44,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:44,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557747973] [2022-01-18 05:31:44,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:44,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:44,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:44,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557747973] [2022-01-18 05:31:44,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557747973] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:44,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066975728] [2022-01-18 05:31:44,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:31:44,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:44,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:44,780 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:31:44,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-01-18 05:31:44,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:31:44,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:44,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:31:44,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:45,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:45,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:45,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:45,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:31:45,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 05:31:45,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:45,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:45,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:45,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:45,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:31:45,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:31:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:45,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066975728] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:45,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:45,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:31:45,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731961483] [2022-01-18 05:31:45,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:45,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:31:45,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:45,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:31:45,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:31:45,842 INFO L87 Difference]: Start difference. First operand 2062 states and 6715 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:31:48,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:48,552 INFO L93 Difference]: Finished difference Result 3248 states and 10717 transitions. [2022-01-18 05:31:48,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 05:31:48,552 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:31:48,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:48,558 INFO L225 Difference]: With dead ends: 3248 [2022-01-18 05:31:48,558 INFO L226 Difference]: Without dead ends: 3235 [2022-01-18 05:31:48,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=561, Invalid=3729, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 05:31:48,558 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 219 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1698 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:48,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 176 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1252 Invalid, 0 Unknown, 1698 Unchecked, 0.5s Time] [2022-01-18 05:31:48,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3235 states. [2022-01-18 05:31:48,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3235 to 2107. [2022-01-18 05:31:48,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2107 states, 2106 states have (on average 3.268281101614435) internal successors, (6883), 2106 states have internal predecessors, (6883), 0 states have call successors, (0), 0 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 05:31:48,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 6883 transitions. [2022-01-18 05:31:48,589 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 6883 transitions. Word has length 24 [2022-01-18 05:31:48,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:48,589 INFO L470 AbstractCegarLoop]: Abstraction has 2107 states and 6883 transitions. [2022-01-18 05:31:48,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:31:48,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 6883 transitions. [2022-01-18 05:31:48,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:31:48,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:48,591 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] [2022-01-18 05:31:48,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-01-18 05:31:48,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2022-01-18 05:31:48,792 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:31:48,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:48,792 INFO L85 PathProgramCache]: Analyzing trace with hash -725136200, now seen corresponding path program 15 times [2022-01-18 05:31:48,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:48,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428557064] [2022-01-18 05:31:48,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:48,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:48,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:49,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:49,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428557064] [2022-01-18 05:31:49,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428557064] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:49,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976080512] [2022-01-18 05:31:49,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:31:49,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:49,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:49,008 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:31:49,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-01-18 05:31:49,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:31:49,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:49,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:31:49,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:49,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:49,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:49,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:49,334 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:31:49,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 05:31:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:49,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:49,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:49,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:49,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:31:49,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:31:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:50,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976080512] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:50,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:50,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:31:50,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672508881] [2022-01-18 05:31:50,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:50,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:31:50,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:50,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:31:50,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:31:50,083 INFO L87 Difference]: Start difference. First operand 2107 states and 6883 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:52,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:52,330 INFO L93 Difference]: Finished difference Result 3163 states and 10622 transitions. [2022-01-18 05:31:52,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 05:31:52,330 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:31:52,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:52,336 INFO L225 Difference]: With dead ends: 3163 [2022-01-18 05:31:52,336 INFO L226 Difference]: Without dead ends: 3151 [2022-01-18 05:31:52,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=435, Invalid=3471, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 05:31:52,336 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 124 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 2216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1237 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:52,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 86 Invalid, 2216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 949 Invalid, 0 Unknown, 1237 Unchecked, 0.4s Time] [2022-01-18 05:31:52,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2022-01-18 05:31:52,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2179. [2022-01-18 05:31:52,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2179 states, 2178 states have (on average 3.2823691460055096) internal successors, (7149), 2178 states have internal predecessors, (7149), 0 states have call successors, (0), 0 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 05:31:52,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2179 states to 2179 states and 7149 transitions. [2022-01-18 05:31:52,366 INFO L78 Accepts]: Start accepts. Automaton has 2179 states and 7149 transitions. Word has length 24 [2022-01-18 05:31:52,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:52,366 INFO L470 AbstractCegarLoop]: Abstraction has 2179 states and 7149 transitions. [2022-01-18 05:31:52,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:31:52,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2179 states and 7149 transitions. [2022-01-18 05:31:52,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:31:52,369 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:52,369 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] [2022-01-18 05:31:52,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-01-18 05:31:52,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-01-18 05:31:52,569 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:31:52,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:52,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1789169850, now seen corresponding path program 18 times [2022-01-18 05:31:52,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:52,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629024960] [2022-01-18 05:31:52,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:52,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:52,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:52,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:52,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629024960] [2022-01-18 05:31:52,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629024960] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:52,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371882121] [2022-01-18 05:31:52,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:31:52,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:52,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:52,778 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:31:52,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-01-18 05:31:52,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:31:52,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:52,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 05:31:52,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:53,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:53,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:53,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:53,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:53,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2022-01-18 05:31:53,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:53,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:53,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:53,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:53,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:31:53,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 60 [2022-01-18 05:31:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:53,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371882121] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:53,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:53,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-18 05:31:53,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738375407] [2022-01-18 05:31:53,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:53,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:31:53,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:53,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:31:53,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:31:53,891 INFO L87 Difference]: Start difference. First operand 2179 states and 7149 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:31:55,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:55,358 INFO L93 Difference]: Finished difference Result 2816 states and 8947 transitions. [2022-01-18 05:31:55,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 05:31:55,358 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:31:55,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:55,363 INFO L225 Difference]: With dead ends: 2816 [2022-01-18 05:31:55,363 INFO L226 Difference]: Without dead ends: 2810 [2022-01-18 05:31:55,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=287, Invalid=2469, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 05:31:55,363 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 196 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 3237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1681 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:55,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 216 Invalid, 3237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1547 Invalid, 0 Unknown, 1681 Unchecked, 0.6s Time] [2022-01-18 05:31:55,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2810 states. [2022-01-18 05:31:55,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2810 to 2155. [2022-01-18 05:31:55,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2154 states have (on average 3.288300835654596) internal successors, (7083), 2154 states have internal predecessors, (7083), 0 states have call successors, (0), 0 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 05:31:55,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 7083 transitions. [2022-01-18 05:31:55,391 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 7083 transitions. Word has length 24 [2022-01-18 05:31:55,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:55,391 INFO L470 AbstractCegarLoop]: Abstraction has 2155 states and 7083 transitions. [2022-01-18 05:31:55,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:31:55,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 7083 transitions. [2022-01-18 05:31:55,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:31:55,394 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:55,394 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] [2022-01-18 05:31:55,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-01-18 05:31:55,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:55,594 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:31:55,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:55,595 INFO L85 PathProgramCache]: Analyzing trace with hash 319872101, now seen corresponding path program 102 times [2022-01-18 05:31:55,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:55,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540436863] [2022-01-18 05:31:55,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:55,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:55,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:55,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540436863] [2022-01-18 05:31:55,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540436863] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:55,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613222428] [2022-01-18 05:31:55,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:31:55,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:55,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:55,823 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:31:55,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-01-18 05:31:55,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:31:55,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:55,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:31:55,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:56,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:56,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:56,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:56,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:31:56,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 05:31:56,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:56,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:31:56,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:56,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:56,796 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:31:56,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:31:56,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:56,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613222428] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:31:56,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:31:56,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:31:56,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73570050] [2022-01-18 05:31:56,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:31:56,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:31:56,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:31:56,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:31:56,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:31:56,914 INFO L87 Difference]: Start difference. First operand 2155 states and 7083 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:31:59,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:31:59,099 INFO L93 Difference]: Finished difference Result 3178 states and 10559 transitions. [2022-01-18 05:31:59,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 05:31:59,100 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:31:59,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:31:59,106 INFO L225 Difference]: With dead ends: 3178 [2022-01-18 05:31:59,106 INFO L226 Difference]: Without dead ends: 3163 [2022-01-18 05:31:59,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=391, Invalid=3031, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 05:31:59,106 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 147 mSDsluCounter, 1306 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 2567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1328 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:31:59,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 233 Invalid, 2567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1195 Invalid, 0 Unknown, 1328 Unchecked, 0.5s Time] [2022-01-18 05:31:59,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2022-01-18 05:31:59,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 2173. [2022-01-18 05:31:59,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2172 states have (on average 3.2905156537753224) internal successors, (7147), 2172 states have internal predecessors, (7147), 0 states have call successors, (0), 0 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 05:31:59,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 7147 transitions. [2022-01-18 05:31:59,147 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 7147 transitions. Word has length 24 [2022-01-18 05:31:59,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:31:59,147 INFO L470 AbstractCegarLoop]: Abstraction has 2173 states and 7147 transitions. [2022-01-18 05:31:59,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:31:59,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 7147 transitions. [2022-01-18 05:31:59,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:31:59,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:31:59,150 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] [2022-01-18 05:31:59,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-01-18 05:31:59,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:59,351 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:31:59,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:31:59,351 INFO L85 PathProgramCache]: Analyzing trace with hash 448954820, now seen corresponding path program 16 times [2022-01-18 05:31:59,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:31:59,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054162838] [2022-01-18 05:31:59,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:31:59,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:31:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:31:59,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:59,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:31:59,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054162838] [2022-01-18 05:31:59,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054162838] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:31:59,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946559173] [2022-01-18 05:31:59,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:31:59,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:31:59,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:31:59,582 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:31:59,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-01-18 05:31:59,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:31:59,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:31:59,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:31:59,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:31:59,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:59,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:31:59,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:59,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:31:59,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:31:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:31:59,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:00,143 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:32:00,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:32:00,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:00,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:00,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:00,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:00,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:32:00,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:00,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946559173] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:00,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:00,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:32:00,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225005192] [2022-01-18 05:32:00,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:00,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:32:00,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:00,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:32:00,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:32:00,210 INFO L87 Difference]: Start difference. First operand 2173 states and 7147 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:01,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:01,307 INFO L93 Difference]: Finished difference Result 2465 states and 8079 transitions. [2022-01-18 05:32:01,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 05:32:01,308 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:32:01,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:01,312 INFO L225 Difference]: With dead ends: 2465 [2022-01-18 05:32:01,312 INFO L226 Difference]: Without dead ends: 2458 [2022-01-18 05:32:01,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=173, Invalid=1633, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 05:32:01,312 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 99 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:01,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 83 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1349 Invalid, 0 Unknown, 193 Unchecked, 0.5s Time] [2022-01-18 05:32:01,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2022-01-18 05:32:01,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 2167. [2022-01-18 05:32:01,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 3.2899353647276084) internal successors, (7126), 2166 states have internal predecessors, (7126), 0 states have call successors, (0), 0 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 05:32:01,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 7126 transitions. [2022-01-18 05:32:01,338 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 7126 transitions. Word has length 24 [2022-01-18 05:32:01,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:01,338 INFO L470 AbstractCegarLoop]: Abstraction has 2167 states and 7126 transitions. [2022-01-18 05:32:01,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:01,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 7126 transitions. [2022-01-18 05:32:01,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:32:01,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:01,341 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] [2022-01-18 05:32:01,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-01-18 05:32:01,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:01,542 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:32:01,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:01,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1299422423, now seen corresponding path program 103 times [2022-01-18 05:32:01,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:01,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88877043] [2022-01-18 05:32:01,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:01,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:01,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:01,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:01,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88877043] [2022-01-18 05:32:01,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88877043] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:01,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503955286] [2022-01-18 05:32:01,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:32:01,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:01,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:01,800 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:32:01,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-01-18 05:32:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:01,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:32:01,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:02,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:02,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:02,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:02,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:02,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:32:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:02,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:02,354 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:32:02,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:32:02,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:02,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:02,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:02,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:02,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:32:02,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:02,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503955286] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:02,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:02,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:32:02,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017679426] [2022-01-18 05:32:02,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:02,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:32:02,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:02,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:32:02,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:32:02,415 INFO L87 Difference]: Start difference. First operand 2167 states and 7126 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:03,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:03,541 INFO L93 Difference]: Finished difference Result 2554 states and 8369 transitions. [2022-01-18 05:32:03,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 05:32:03,542 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:32:03,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:03,546 INFO L225 Difference]: With dead ends: 2554 [2022-01-18 05:32:03,546 INFO L226 Difference]: Without dead ends: 2544 [2022-01-18 05:32:03,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=180, Invalid=1712, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 05:32:03,547 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 138 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 708 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:03,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 69 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1284 Invalid, 0 Unknown, 708 Unchecked, 0.5s Time] [2022-01-18 05:32:03,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2022-01-18 05:32:03,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2169. [2022-01-18 05:32:03,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2168 states have (on average 3.2896678966789668) internal successors, (7132), 2168 states have internal predecessors, (7132), 0 states have call successors, (0), 0 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 05:32:03,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 7132 transitions. [2022-01-18 05:32:03,574 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 7132 transitions. Word has length 24 [2022-01-18 05:32:03,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:03,574 INFO L470 AbstractCegarLoop]: Abstraction has 2169 states and 7132 transitions. [2022-01-18 05:32:03,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 7132 transitions. [2022-01-18 05:32:03,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:32:03,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:03,577 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] [2022-01-18 05:32:03,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-01-18 05:32:03,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2022-01-18 05:32:03,777 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:32:03,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:03,778 INFO L85 PathProgramCache]: Analyzing trace with hash -999955525, now seen corresponding path program 104 times [2022-01-18 05:32:03,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:03,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494576726] [2022-01-18 05:32:03,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:03,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:03,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:03,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:03,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494576726] [2022-01-18 05:32:03,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494576726] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:03,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426650485] [2022-01-18 05:32:03,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:32:03,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:03,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:03,996 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:32:03,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-01-18 05:32:04,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:32:04,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:32:04,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:32:04,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:04,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:04,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:04,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:04,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:32:04,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 05:32:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:04,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:04,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:04,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:04,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:32:04,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:32:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:05,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426650485] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:05,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:05,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:32:05,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003655675] [2022-01-18 05:32:05,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:05,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:32:05,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:05,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:32:05,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:32:05,149 INFO L87 Difference]: Start difference. First operand 2169 states and 7132 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:32:09,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:09,247 INFO L93 Difference]: Finished difference Result 3653 states and 12342 transitions. [2022-01-18 05:32:09,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-18 05:32:09,247 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:32:09,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:09,253 INFO L225 Difference]: With dead ends: 3653 [2022-01-18 05:32:09,254 INFO L226 Difference]: Without dead ends: 3646 [2022-01-18 05:32:09,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=660, Invalid=5346, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 05:32:09,254 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 205 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 2501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1365 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:09,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 189 Invalid, 2501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1088 Invalid, 0 Unknown, 1365 Unchecked, 0.5s Time] [2022-01-18 05:32:09,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3646 states. [2022-01-18 05:32:09,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3646 to 2188. [2022-01-18 05:32:09,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 3.3017832647462275) internal successors, (7221), 2187 states have internal predecessors, (7221), 0 states have call successors, (0), 0 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 05:32:09,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 7221 transitions. [2022-01-18 05:32:09,294 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 7221 transitions. Word has length 24 [2022-01-18 05:32:09,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:09,294 INFO L470 AbstractCegarLoop]: Abstraction has 2188 states and 7221 transitions. [2022-01-18 05:32:09,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:32:09,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 7221 transitions. [2022-01-18 05:32:09,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:32:09,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:09,297 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] [2022-01-18 05:32:09,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-01-18 05:32:09,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:09,513 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:32:09,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:09,513 INFO L85 PathProgramCache]: Analyzing trace with hash 925650051, now seen corresponding path program 105 times [2022-01-18 05:32:09,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:09,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896752810] [2022-01-18 05:32:09,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:09,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:09,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:09,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:09,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896752810] [2022-01-18 05:32:09,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896752810] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:09,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220624964] [2022-01-18 05:32:09,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:32:09,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:09,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:09,729 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:32:09,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-01-18 05:32:09,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:32:09,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:32:09,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:32:09,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:10,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:10,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:10,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:10,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-01-18 05:32:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:10,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:10,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:10,438 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:32:10,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-01-18 05:32:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:10,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220624964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:10,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:10,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-18 05:32:10,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663638444] [2022-01-18 05:32:10,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:10,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:32:10,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:10,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:32:10,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:32:10,515 INFO L87 Difference]: Start difference. First operand 2188 states and 7221 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:32:12,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:12,269 INFO L93 Difference]: Finished difference Result 2585 states and 8416 transitions. [2022-01-18 05:32:12,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 05:32:12,269 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:32:12,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:12,273 INFO L225 Difference]: With dead ends: 2585 [2022-01-18 05:32:12,273 INFO L226 Difference]: Without dead ends: 2579 [2022-01-18 05:32:12,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=383, Invalid=3399, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 05:32:12,274 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 150 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 2038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 635 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:12,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 121 Invalid, 2038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1336 Invalid, 0 Unknown, 635 Unchecked, 0.6s Time] [2022-01-18 05:32:12,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2579 states. [2022-01-18 05:32:12,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2579 to 2194. [2022-01-18 05:32:12,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 2193 states have (on average 3.3046055631554947) internal successors, (7247), 2193 states have internal predecessors, (7247), 0 states have call successors, (0), 0 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 05:32:12,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 7247 transitions. [2022-01-18 05:32:12,302 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 7247 transitions. Word has length 24 [2022-01-18 05:32:12,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:12,302 INFO L470 AbstractCegarLoop]: Abstraction has 2194 states and 7247 transitions. [2022-01-18 05:32:12,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:32:12,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 7247 transitions. [2022-01-18 05:32:12,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:32:12,305 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:12,305 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] [2022-01-18 05:32:12,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2022-01-18 05:32:12,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:12,505 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:32:12,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:12,506 INFO L85 PathProgramCache]: Analyzing trace with hash -2054445773, now seen corresponding path program 106 times [2022-01-18 05:32:12,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:12,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22054064] [2022-01-18 05:32:12,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:12,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:12,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:12,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22054064] [2022-01-18 05:32:12,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22054064] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:12,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008971061] [2022-01-18 05:32:12,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:32:12,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:12,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:12,701 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:32:12,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-01-18 05:32:12,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:32:12,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:32:12,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:32:12,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:12,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:12,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:12,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:12,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:12,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:32:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:13,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:13,265 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:32:13,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:32:13,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:13,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:13,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:13,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:13,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:32:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:13,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008971061] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:13,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:13,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:32:13,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404961008] [2022-01-18 05:32:13,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:13,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:32:13,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:13,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:32:13,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:32:13,320 INFO L87 Difference]: Start difference. First operand 2194 states and 7247 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:14,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:14,480 INFO L93 Difference]: Finished difference Result 2561 states and 8346 transitions. [2022-01-18 05:32:14,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 05:32:14,480 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:32:14,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:14,484 INFO L225 Difference]: With dead ends: 2561 [2022-01-18 05:32:14,484 INFO L226 Difference]: Without dead ends: 2554 [2022-01-18 05:32:14,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=208, Invalid=1954, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 05:32:14,485 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 132 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 2001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:14,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 157 Invalid, 2001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1740 Invalid, 0 Unknown, 225 Unchecked, 0.6s Time] [2022-01-18 05:32:14,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2022-01-18 05:32:14,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 2200. [2022-01-18 05:32:14,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 3.3024101864483857) internal successors, (7262), 2199 states have internal predecessors, (7262), 0 states have call successors, (0), 0 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 05:32:14,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 7262 transitions. [2022-01-18 05:32:14,513 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 7262 transitions. Word has length 24 [2022-01-18 05:32:14,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:14,513 INFO L470 AbstractCegarLoop]: Abstraction has 2200 states and 7262 transitions. [2022-01-18 05:32:14,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:14,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 7262 transitions. [2022-01-18 05:32:14,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:32:14,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:14,516 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] [2022-01-18 05:32:14,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-01-18 05:32:14,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable185 [2022-01-18 05:32:14,716 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:32:14,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:14,716 INFO L85 PathProgramCache]: Analyzing trace with hash 976075949, now seen corresponding path program 107 times [2022-01-18 05:32:14,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:14,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437259342] [2022-01-18 05:32:14,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:14,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:14,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:14,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:14,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437259342] [2022-01-18 05:32:14,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437259342] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:14,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719271110] [2022-01-18 05:32:14,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:32:14,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:14,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:14,913 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:32:14,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-01-18 05:32:14,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:32:14,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:32:14,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:32:14,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:15,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:15,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:15,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:15,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:15,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:32:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:15,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:15,494 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:32:15,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:32:15,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:15,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:15,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:15,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:15,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:32:15,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:15,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719271110] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:15,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:15,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:32:15,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405043458] [2022-01-18 05:32:15,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:15,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:32:15,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:15,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:32:15,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:32:15,555 INFO L87 Difference]: Start difference. First operand 2200 states and 7262 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:16,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:16,762 INFO L93 Difference]: Finished difference Result 2566 states and 8345 transitions. [2022-01-18 05:32:16,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 05:32:16,762 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:32:16,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:16,766 INFO L225 Difference]: With dead ends: 2566 [2022-01-18 05:32:16,766 INFO L226 Difference]: Without dead ends: 2564 [2022-01-18 05:32:16,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=1958, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 05:32:16,769 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 112 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 331 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:16,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 159 Invalid, 2102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1745 Invalid, 0 Unknown, 331 Unchecked, 0.7s Time] [2022-01-18 05:32:16,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2564 states. [2022-01-18 05:32:16,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2564 to 2200. [2022-01-18 05:32:16,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 3.3024101864483857) internal successors, (7262), 2199 states have internal predecessors, (7262), 0 states have call successors, (0), 0 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 05:32:16,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 7262 transitions. [2022-01-18 05:32:16,799 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 7262 transitions. Word has length 24 [2022-01-18 05:32:16,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:16,799 INFO L470 AbstractCegarLoop]: Abstraction has 2200 states and 7262 transitions. [2022-01-18 05:32:16,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:16,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 7262 transitions. [2022-01-18 05:32:16,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:32:16,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:16,802 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] [2022-01-18 05:32:16,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2022-01-18 05:32:17,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:17,003 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:32:17,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:17,003 INFO L85 PathProgramCache]: Analyzing trace with hash -679235281, now seen corresponding path program 108 times [2022-01-18 05:32:17,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:17,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712099651] [2022-01-18 05:32:17,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:17,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:17,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:17,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712099651] [2022-01-18 05:32:17,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712099651] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:17,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812181989] [2022-01-18 05:32:17,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:32:17,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:17,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:17,197 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:32:17,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-01-18 05:32:17,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:32:17,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:32:17,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 05:32:17,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:17,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:17,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:17,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:17,710 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:32:17,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2022-01-18 05:32:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:17,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:18,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:18,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:18,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:18,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:18,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2022-01-18 05:32:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:18,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812181989] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:18,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:18,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-01-18 05:32:18,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295849108] [2022-01-18 05:32:18,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:18,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:32:18,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:18,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:32:18,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:32:18,313 INFO L87 Difference]: Start difference. First operand 2200 states and 7262 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:22,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:22,081 INFO L93 Difference]: Finished difference Result 3532 states and 11623 transitions. [2022-01-18 05:32:22,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-18 05:32:22,081 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:32:22,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:22,087 INFO L225 Difference]: With dead ends: 3532 [2022-01-18 05:32:22,087 INFO L226 Difference]: Without dead ends: 3521 [2022-01-18 05:32:22,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3901 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1258, Invalid=10298, Unknown=0, NotChecked=0, Total=11556 [2022-01-18 05:32:22,088 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 442 mSDsluCounter, 1357 mSDsCounter, 0 mSdLazyCounter, 1711 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 2881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1069 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:22,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 175 Invalid, 2881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1711 Invalid, 0 Unknown, 1069 Unchecked, 0.8s Time] [2022-01-18 05:32:22,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3521 states. [2022-01-18 05:32:22,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3521 to 2256. [2022-01-18 05:32:22,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 3.2829268292682925) internal successors, (7403), 2255 states have internal predecessors, (7403), 0 states have call successors, (0), 0 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 05:32:22,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 7403 transitions. [2022-01-18 05:32:22,121 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 7403 transitions. Word has length 24 [2022-01-18 05:32:22,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:22,121 INFO L470 AbstractCegarLoop]: Abstraction has 2256 states and 7403 transitions. [2022-01-18 05:32:22,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:22,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 7403 transitions. [2022-01-18 05:32:22,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:32:22,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:22,124 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] [2022-01-18 05:32:22,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-01-18 05:32:22,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:22,325 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:32:22,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:22,325 INFO L85 PathProgramCache]: Analyzing trace with hash 443570164, now seen corresponding path program 19 times [2022-01-18 05:32:22,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:22,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419372334] [2022-01-18 05:32:22,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:22,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:22,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:22,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:22,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:22,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419372334] [2022-01-18 05:32:22,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419372334] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:22,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860266985] [2022-01-18 05:32:22,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:32:22,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:22,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:22,519 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:32:22,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-01-18 05:32:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:22,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:32:22,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:22,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:22,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:22,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:22,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:22,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:32:22,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:22,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:23,082 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:32:23,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:32:23,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:23,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:23,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:23,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:23,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:32:23,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:23,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860266985] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:23,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:23,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:32:23,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100000444] [2022-01-18 05:32:23,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:23,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:32:23,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:23,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:32:23,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:32:23,145 INFO L87 Difference]: Start difference. First operand 2256 states and 7403 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:24,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:24,152 INFO L93 Difference]: Finished difference Result 2774 states and 8963 transitions. [2022-01-18 05:32:24,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 05:32:24,152 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:32:24,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:24,157 INFO L225 Difference]: With dead ends: 2774 [2022-01-18 05:32:24,157 INFO L226 Difference]: Without dead ends: 2767 [2022-01-18 05:32:24,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=1788, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 05:32:24,157 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 138 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 1613 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 844 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:24,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 156 Invalid, 2480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1613 Invalid, 0 Unknown, 844 Unchecked, 0.6s Time] [2022-01-18 05:32:24,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2767 states. [2022-01-18 05:32:24,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2767 to 2254. [2022-01-18 05:32:24,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 2253 states have (on average 3.28450954283178) internal successors, (7400), 2253 states have internal predecessors, (7400), 0 states have call successors, (0), 0 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 05:32:24,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 7400 transitions. [2022-01-18 05:32:24,188 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 7400 transitions. Word has length 24 [2022-01-18 05:32:24,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:24,188 INFO L470 AbstractCegarLoop]: Abstraction has 2254 states and 7400 transitions. [2022-01-18 05:32:24,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:24,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 7400 transitions. [2022-01-18 05:32:24,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:32:24,191 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:24,191 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] [2022-01-18 05:32:24,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-01-18 05:32:24,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:24,391 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:32:24,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:24,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1659991413, now seen corresponding path program 109 times [2022-01-18 05:32:24,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:24,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058790546] [2022-01-18 05:32:24,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:24,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:24,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:24,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058790546] [2022-01-18 05:32:24,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058790546] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:24,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593226264] [2022-01-18 05:32:24,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:32:24,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:24,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:24,625 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:32:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:24,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-01-18 05:32:24,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:32:24,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:24,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:24,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:24,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:24,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:24,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:32:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:24,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:25,210 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:32:25,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:32:25,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:25,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:25,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:25,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:25,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:32:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:25,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593226264] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:25,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:25,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:32:25,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568735200] [2022-01-18 05:32:25,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:25,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:32:25,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:25,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:32:25,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:32:25,264 INFO L87 Difference]: Start difference. First operand 2254 states and 7400 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:32:26,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:26,004 INFO L93 Difference]: Finished difference Result 2643 states and 8605 transitions. [2022-01-18 05:32:26,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 05:32:26,004 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:32:26,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:26,008 INFO L225 Difference]: With dead ends: 2643 [2022-01-18 05:32:26,008 INFO L226 Difference]: Without dead ends: 2637 [2022-01-18 05:32:26,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 05:32:26,009 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 145 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 2261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1088 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:26,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 133 Invalid, 2261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1156 Invalid, 0 Unknown, 1088 Unchecked, 0.4s Time] [2022-01-18 05:32:26,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2022-01-18 05:32:26,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 2232. [2022-01-18 05:32:26,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 3.2909009412819366) internal successors, (7342), 2231 states have internal predecessors, (7342), 0 states have call successors, (0), 0 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 05:32:26,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 7342 transitions. [2022-01-18 05:32:26,036 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 7342 transitions. Word has length 24 [2022-01-18 05:32:26,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:26,036 INFO L470 AbstractCegarLoop]: Abstraction has 2232 states and 7342 transitions. [2022-01-18 05:32:26,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:32:26,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 7342 transitions. [2022-01-18 05:32:26,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:32:26,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:26,039 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] [2022-01-18 05:32:26,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-01-18 05:32:26,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-01-18 05:32:26,239 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:32:26,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:26,239 INFO L85 PathProgramCache]: Analyzing trace with hash -22424909, now seen corresponding path program 110 times [2022-01-18 05:32:26,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:26,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538119720] [2022-01-18 05:32:26,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:26,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:26,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:26,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:26,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538119720] [2022-01-18 05:32:26,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538119720] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:26,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344456863] [2022-01-18 05:32:26,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:32:26,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:26,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:26,475 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:32:26,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-01-18 05:32:26,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:32:26,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:32:26,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:32:26,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:26,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:26,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:26,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:26,813 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:32:26,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 51 [2022-01-18 05:32:26,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:26,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:27,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:27,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:27,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:27,298 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:32:27,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 50 [2022-01-18 05:32:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:27,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344456863] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:27,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:27,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 28 [2022-01-18 05:32:27,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616035149] [2022-01-18 05:32:27,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:27,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:32:27,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:27,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:32:27,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:32:27,379 INFO L87 Difference]: Start difference. First operand 2232 states and 7342 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:32:28,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:28,118 INFO L93 Difference]: Finished difference Result 2702 states and 8810 transitions. [2022-01-18 05:32:28,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 05:32:28,118 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:32:28,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:28,123 INFO L225 Difference]: With dead ends: 2702 [2022-01-18 05:32:28,123 INFO L226 Difference]: Without dead ends: 2690 [2022-01-18 05:32:28,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 05:32:28,123 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 107 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 572 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:28,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 124 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 851 Invalid, 0 Unknown, 572 Unchecked, 0.3s Time] [2022-01-18 05:32:28,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2022-01-18 05:32:28,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2249. [2022-01-18 05:32:28,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2249 states, 2248 states have (on average 3.2895907473309607) internal successors, (7395), 2248 states have internal predecessors, (7395), 0 states have call successors, (0), 0 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 05:32:28,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2249 states to 2249 states and 7395 transitions. [2022-01-18 05:32:28,152 INFO L78 Accepts]: Start accepts. Automaton has 2249 states and 7395 transitions. Word has length 24 [2022-01-18 05:32:28,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:28,152 INFO L470 AbstractCegarLoop]: Abstraction has 2249 states and 7395 transitions. [2022-01-18 05:32:28,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:32:28,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states and 7395 transitions. [2022-01-18 05:32:28,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:32:28,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:28,155 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] [2022-01-18 05:32:28,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2022-01-18 05:32:28,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-01-18 05:32:28,356 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:32:28,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:28,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1339655707, now seen corresponding path program 111 times [2022-01-18 05:32:28,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:28,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892717653] [2022-01-18 05:32:28,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:28,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:28,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:28,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:28,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892717653] [2022-01-18 05:32:28,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892717653] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:28,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632722281] [2022-01-18 05:32:28,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:32:28,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:28,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:28,610 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:32:28,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-01-18 05:32:28,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:32:28,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:32:28,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:32:28,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:28,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:28,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:28,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:32:28,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 57 [2022-01-18 05:32:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:29,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:29,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:29,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:29,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:29,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:29,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2022-01-18 05:32:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:29,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632722281] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:29,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:29,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-01-18 05:32:29,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504357815] [2022-01-18 05:32:29,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:29,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:32:29,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:29,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:32:29,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:32:29,606 INFO L87 Difference]: Start difference. First operand 2249 states and 7395 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:32:33,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:33,531 INFO L93 Difference]: Finished difference Result 3092 states and 9920 transitions. [2022-01-18 05:32:33,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 05:32:33,532 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:32:33,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:33,537 INFO L225 Difference]: With dead ends: 3092 [2022-01-18 05:32:33,537 INFO L226 Difference]: Without dead ends: 3072 [2022-01-18 05:32:33,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1951 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=735, Invalid=6575, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 05:32:33,538 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 327 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 2427 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 3533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 924 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:33,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 186 Invalid, 3533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2427 Invalid, 0 Unknown, 924 Unchecked, 1.1s Time] [2022-01-18 05:32:33,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2022-01-18 05:32:33,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 2263. [2022-01-18 05:32:33,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 3.2939876215738284) internal successors, (7451), 2262 states have internal predecessors, (7451), 0 states have call successors, (0), 0 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 05:32:33,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 7451 transitions. [2022-01-18 05:32:33,570 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 7451 transitions. Word has length 24 [2022-01-18 05:32:33,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:33,571 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 7451 transitions. [2022-01-18 05:32:33,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:32:33,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 7451 transitions. [2022-01-18 05:32:33,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:32:33,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:33,574 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] [2022-01-18 05:32:33,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-01-18 05:32:33,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:33,775 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:32:33,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:33,775 INFO L85 PathProgramCache]: Analyzing trace with hash -299419909, now seen corresponding path program 112 times [2022-01-18 05:32:33,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:33,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100962456] [2022-01-18 05:32:33,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:33,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:34,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:34,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100962456] [2022-01-18 05:32:34,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100962456] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:34,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174446832] [2022-01-18 05:32:34,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:32:34,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:34,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:34,003 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:32:34,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-01-18 05:32:34,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:32:34,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:32:34,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:32:34,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:34,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:34,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:34,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:34,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:34,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2022-01-18 05:32:34,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:34,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:34,510 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:32:34,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:32:34,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:34,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:34,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:34,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:34,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:32:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:34,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174446832] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:34,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:34,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:32:34,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635341232] [2022-01-18 05:32:34,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:34,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:32:34,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:34,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:32:34,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:32:34,566 INFO L87 Difference]: Start difference. First operand 2263 states and 7451 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:35,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:35,516 INFO L93 Difference]: Finished difference Result 2531 states and 8331 transitions. [2022-01-18 05:32:35,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 05:32:35,517 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:32:35,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:35,521 INFO L225 Difference]: With dead ends: 2531 [2022-01-18 05:32:35,521 INFO L226 Difference]: Without dead ends: 2524 [2022-01-18 05:32:35,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 05:32:35,521 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 99 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:35,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 103 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1538 Invalid, 0 Unknown, 480 Unchecked, 0.6s Time] [2022-01-18 05:32:35,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2022-01-18 05:32:35,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 2265. [2022-01-18 05:32:35,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 2264 states have (on average 3.2928445229681977) internal successors, (7455), 2264 states have internal predecessors, (7455), 0 states have call successors, (0), 0 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 05:32:35,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 7455 transitions. [2022-01-18 05:32:35,550 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 7455 transitions. Word has length 24 [2022-01-18 05:32:35,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:35,550 INFO L470 AbstractCegarLoop]: Abstraction has 2265 states and 7455 transitions. [2022-01-18 05:32:35,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:35,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 7455 transitions. [2022-01-18 05:32:35,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:32:35,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:35,553 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] [2022-01-18 05:32:35,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2022-01-18 05:32:35,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2022-01-18 05:32:35,754 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:32:35,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:35,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1133158349, now seen corresponding path program 113 times [2022-01-18 05:32:35,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:35,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250854934] [2022-01-18 05:32:35,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:35,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:35,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:35,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250854934] [2022-01-18 05:32:35,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250854934] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:35,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463977822] [2022-01-18 05:32:35,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:32:35,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:35,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:35,999 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:32:35,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-01-18 05:32:36,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 05:32:36,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:32:36,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:32:36,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:36,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:36,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:36,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:36,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:32:36,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 35 [2022-01-18 05:32:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:36,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:37,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:37,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:37,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:37,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:37,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2022-01-18 05:32:37,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:37,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463977822] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:37,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:37,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-01-18 05:32:37,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916727184] [2022-01-18 05:32:37,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:37,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 05:32:37,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:37,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 05:32:37,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:32:37,094 INFO L87 Difference]: Start difference. First operand 2265 states and 7455 transitions. Second operand has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:32:38,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:38,066 INFO L93 Difference]: Finished difference Result 2355 states and 7699 transitions. [2022-01-18 05:32:38,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 05:32:38,066 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:32:38,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:38,070 INFO L225 Difference]: With dead ends: 2355 [2022-01-18 05:32:38,070 INFO L226 Difference]: Without dead ends: 2353 [2022-01-18 05:32:38,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=260, Invalid=2092, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 05:32:38,071 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 80 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 494 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:38,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 123 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 821 Invalid, 0 Unknown, 494 Unchecked, 0.3s Time] [2022-01-18 05:32:38,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2022-01-18 05:32:38,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 2274. [2022-01-18 05:32:38,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2274 states, 2273 states have (on average 3.291684997800264) internal successors, (7482), 2273 states have internal predecessors, (7482), 0 states have call successors, (0), 0 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 05:32:38,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2274 states to 2274 states and 7482 transitions. [2022-01-18 05:32:38,099 INFO L78 Accepts]: Start accepts. Automaton has 2274 states and 7482 transitions. Word has length 24 [2022-01-18 05:32:38,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:38,099 INFO L470 AbstractCegarLoop]: Abstraction has 2274 states and 7482 transitions. [2022-01-18 05:32:38,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:32:38,099 INFO L276 IsEmpty]: Start isEmpty. Operand 2274 states and 7482 transitions. [2022-01-18 05:32:38,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:32:38,102 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:38,102 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] [2022-01-18 05:32:38,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-01-18 05:32:38,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:38,302 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:32:38,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:38,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1149245489, now seen corresponding path program 114 times [2022-01-18 05:32:38,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:38,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887681425] [2022-01-18 05:32:38,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:38,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:38,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:38,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:38,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887681425] [2022-01-18 05:32:38,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887681425] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:38,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309773900] [2022-01-18 05:32:38,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:32:38,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:38,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:38,527 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:32:38,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-01-18 05:32:38,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 05:32:38,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:32:38,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:32:38,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:38,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:38,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:32:38,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-01-18 05:32:39,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:39,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:39,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:39,372 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:32:39,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 55 [2022-01-18 05:32:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:39,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309773900] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:39,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:39,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-18 05:32:39,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638416192] [2022-01-18 05:32:39,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:39,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:32:39,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:39,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:32:39,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:32:39,460 INFO L87 Difference]: Start difference. First operand 2274 states and 7482 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:40,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:40,829 INFO L93 Difference]: Finished difference Result 2560 states and 8385 transitions. [2022-01-18 05:32:40,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 05:32:40,829 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:32:40,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:40,833 INFO L225 Difference]: With dead ends: 2560 [2022-01-18 05:32:40,833 INFO L226 Difference]: Without dead ends: 2551 [2022-01-18 05:32:40,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=259, Invalid=1903, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 05:32:40,834 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 108 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 2279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 389 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:40,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 114 Invalid, 2279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1856 Invalid, 0 Unknown, 389 Unchecked, 0.7s Time] [2022-01-18 05:32:40,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2022-01-18 05:32:40,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 2279. [2022-01-18 05:32:40,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2279 states, 2278 states have (on average 3.2888498683055314) internal successors, (7492), 2278 states have internal predecessors, (7492), 0 states have call successors, (0), 0 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 05:32:40,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 7492 transitions. [2022-01-18 05:32:40,860 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 7492 transitions. Word has length 24 [2022-01-18 05:32:40,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:40,861 INFO L470 AbstractCegarLoop]: Abstraction has 2279 states and 7492 transitions. [2022-01-18 05:32:40,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:40,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 7492 transitions. [2022-01-18 05:32:40,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:32:40,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:40,863 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] [2022-01-18 05:32:40,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2022-01-18 05:32:41,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:41,064 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:32:41,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:41,064 INFO L85 PathProgramCache]: Analyzing trace with hash -97756617, now seen corresponding path program 115 times [2022-01-18 05:32:41,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:41,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375787253] [2022-01-18 05:32:41,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:41,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:41,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:41,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375787253] [2022-01-18 05:32:41,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375787253] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:41,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719311084] [2022-01-18 05:32:41,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:32:41,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:41,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:41,312 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:32:41,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-01-18 05:32:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:41,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:32:41,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:41,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:41,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:41,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:41,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:41,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:32:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:41,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:41,847 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:32:41,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:32:41,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:41,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:41,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:41,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:41,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:32:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:41,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719311084] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:41,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:41,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:32:41,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401295493] [2022-01-18 05:32:41,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:41,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:32:41,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:41,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:32:41,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:32:41,911 INFO L87 Difference]: Start difference. First operand 2279 states and 7492 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:42,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:42,998 INFO L93 Difference]: Finished difference Result 2643 states and 8668 transitions. [2022-01-18 05:32:42,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 05:32:42,998 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:32:42,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:43,003 INFO L225 Difference]: With dead ends: 2643 [2022-01-18 05:32:43,003 INFO L226 Difference]: Without dead ends: 2639 [2022-01-18 05:32:43,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 05:32:43,003 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 2315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 884 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:43,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 203 Invalid, 2315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1410 Invalid, 0 Unknown, 884 Unchecked, 0.6s Time] [2022-01-18 05:32:43,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2022-01-18 05:32:43,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2298. [2022-01-18 05:32:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2297 states have (on average 3.286460600783631) internal successors, (7549), 2297 states have internal predecessors, (7549), 0 states have call successors, (0), 0 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 05:32:43,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 7549 transitions. [2022-01-18 05:32:43,031 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 7549 transitions. Word has length 24 [2022-01-18 05:32:43,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:43,031 INFO L470 AbstractCegarLoop]: Abstraction has 2298 states and 7549 transitions. [2022-01-18 05:32:43,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:43,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 7549 transitions. [2022-01-18 05:32:43,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:32:43,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:43,034 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] [2022-01-18 05:32:43,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2022-01-18 05:32:43,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:43,234 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:32:43,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:43,235 INFO L85 PathProgramCache]: Analyzing trace with hash 789747064, now seen corresponding path program 20 times [2022-01-18 05:32:43,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:43,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008231672] [2022-01-18 05:32:43,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:43,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:43,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:43,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:43,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008231672] [2022-01-18 05:32:43,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008231672] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:43,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412090250] [2022-01-18 05:32:43,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:32:43,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:43,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:43,484 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:32:43,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-01-18 05:32:43,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:32:43,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:32:43,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:32:43,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:43,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:43,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:32:43,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2022-01-18 05:32:43,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:43,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:44,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:44,348 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:32:44,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 55 [2022-01-18 05:32:44,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:44,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412090250] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:44,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:44,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-18 05:32:44,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335231823] [2022-01-18 05:32:44,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:44,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:32:44,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:44,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:32:44,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:32:44,463 INFO L87 Difference]: Start difference. First operand 2298 states and 7549 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:45,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:45,977 INFO L93 Difference]: Finished difference Result 2580 states and 8443 transitions. [2022-01-18 05:32:45,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 05:32:45,977 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:32:45,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:45,982 INFO L225 Difference]: With dead ends: 2580 [2022-01-18 05:32:45,982 INFO L226 Difference]: Without dead ends: 2572 [2022-01-18 05:32:45,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=269, Invalid=2181, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 05:32:45,982 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 172 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 1795 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 529 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:45,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 129 Invalid, 2380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1795 Invalid, 0 Unknown, 529 Unchecked, 0.7s Time] [2022-01-18 05:32:45,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2022-01-18 05:32:46,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 2299. [2022-01-18 05:32:46,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2298 states have (on average 3.286771105308964) internal successors, (7553), 2298 states have internal predecessors, (7553), 0 states have call successors, (0), 0 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 05:32:46,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 7553 transitions. [2022-01-18 05:32:46,012 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 7553 transitions. Word has length 24 [2022-01-18 05:32:46,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:46,012 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 7553 transitions. [2022-01-18 05:32:46,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:46,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 7553 transitions. [2022-01-18 05:32:46,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:32:46,015 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:46,015 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] [2022-01-18 05:32:46,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-01-18 05:32:46,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:46,216 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:32:46,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:46,216 INFO L85 PathProgramCache]: Analyzing trace with hash -836912765, now seen corresponding path program 116 times [2022-01-18 05:32:46,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:46,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274395216] [2022-01-18 05:32:46,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:46,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:46,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:46,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274395216] [2022-01-18 05:32:46,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274395216] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:46,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016922206] [2022-01-18 05:32:46,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:32:46,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:46,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:46,456 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:32:46,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-01-18 05:32:46,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:32:46,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:32:46,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:32:46,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:46,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:46,704 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:32:46,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-01-18 05:32:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:46,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:47,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:47,250 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:32:47,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-01-18 05:32:47,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:47,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016922206] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:47,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:47,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:32:47,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470539921] [2022-01-18 05:32:47,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:47,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:32:47,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:47,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:32:47,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:32:47,347 INFO L87 Difference]: Start difference. First operand 2299 states and 7553 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:48,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:48,529 INFO L93 Difference]: Finished difference Result 2549 states and 8360 transitions. [2022-01-18 05:32:48,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 05:32:48,530 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:32:48,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:48,534 INFO L225 Difference]: With dead ends: 2549 [2022-01-18 05:32:48,534 INFO L226 Difference]: Without dead ends: 2542 [2022-01-18 05:32:48,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=228, Invalid=1752, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 05:32:48,535 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 90 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 1764 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 2206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 418 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:48,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 125 Invalid, 2206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1764 Invalid, 0 Unknown, 418 Unchecked, 0.7s Time] [2022-01-18 05:32:48,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2022-01-18 05:32:48,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 2302. [2022-01-18 05:32:48,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 2301 states have (on average 3.2859626249456757) internal successors, (7561), 2301 states have internal predecessors, (7561), 0 states have call successors, (0), 0 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 05:32:48,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 7561 transitions. [2022-01-18 05:32:48,565 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 7561 transitions. Word has length 24 [2022-01-18 05:32:48,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:48,565 INFO L470 AbstractCegarLoop]: Abstraction has 2302 states and 7561 transitions. [2022-01-18 05:32:48,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:48,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 7561 transitions. [2022-01-18 05:32:48,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:32:48,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:48,568 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] [2022-01-18 05:32:48,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-01-18 05:32:48,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:48,783 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:32:48,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:48,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1670651205, now seen corresponding path program 117 times [2022-01-18 05:32:48,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:48,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279591689] [2022-01-18 05:32:48,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:48,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:49,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:49,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279591689] [2022-01-18 05:32:49,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279591689] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:49,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185521236] [2022-01-18 05:32:49,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:32:49,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:49,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:49,066 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:32:49,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-01-18 05:32:49,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 05:32:49,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:32:49,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 05:32:49,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:49,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:49,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:49,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:32:49,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 56 [2022-01-18 05:32:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:49,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:50,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:50,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:50,491 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:32:50,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 61 [2022-01-18 05:32:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:50,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185521236] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:50,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:50,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-01-18 05:32:50,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051560543] [2022-01-18 05:32:50,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:50,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:32:50,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:50,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:32:50,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:32:50,649 INFO L87 Difference]: Start difference. First operand 2302 states and 7561 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:53,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:53,422 INFO L93 Difference]: Finished difference Result 2576 states and 8306 transitions. [2022-01-18 05:32:53,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 05:32:53,423 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:32:53,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:53,427 INFO L225 Difference]: With dead ends: 2576 [2022-01-18 05:32:53,427 INFO L226 Difference]: Without dead ends: 2537 [2022-01-18 05:32:53,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=387, Invalid=4169, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 05:32:53,427 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 161 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 2192 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 3183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 968 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:53,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 168 Invalid, 3183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2192 Invalid, 0 Unknown, 968 Unchecked, 0.9s Time] [2022-01-18 05:32:53,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2022-01-18 05:32:53,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 2314. [2022-01-18 05:32:53,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2314 states, 2313 states have (on average 3.283614353653264) internal successors, (7595), 2313 states have internal predecessors, (7595), 0 states have call successors, (0), 0 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 05:32:53,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 7595 transitions. [2022-01-18 05:32:53,455 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 7595 transitions. Word has length 24 [2022-01-18 05:32:53,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:53,455 INFO L470 AbstractCegarLoop]: Abstraction has 2314 states and 7595 transitions. [2022-01-18 05:32:53,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:53,455 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 7595 transitions. [2022-01-18 05:32:53,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:32:53,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:53,458 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] [2022-01-18 05:32:53,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-01-18 05:32:53,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2022-01-18 05:32:53,658 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:32:53,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:53,659 INFO L85 PathProgramCache]: Analyzing trace with hash -335916765, now seen corresponding path program 118 times [2022-01-18 05:32:53,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:53,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275767120] [2022-01-18 05:32:53,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:53,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:53,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:53,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275767120] [2022-01-18 05:32:53,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275767120] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:53,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751350315] [2022-01-18 05:32:53,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:32:53,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:53,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:53,879 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:32:53,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-01-18 05:32:53,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:32:53,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:32:53,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:32:53,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:54,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:54,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:54,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:54,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:54,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:32:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:54,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:54,400 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:32:54,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:32:54,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:54,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:54,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:54,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:54,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:32:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:54,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751350315] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:54,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:54,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:32:54,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815946594] [2022-01-18 05:32:54,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:54,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:32:54,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:54,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:32:54,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:32:54,462 INFO L87 Difference]: Start difference. First operand 2314 states and 7595 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 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) [2022-01-18 05:32:55,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:55,767 INFO L93 Difference]: Finished difference Result 2761 states and 9036 transitions. [2022-01-18 05:32:55,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 05:32:55,767 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 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) Word has length 24 [2022-01-18 05:32:55,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:55,772 INFO L225 Difference]: With dead ends: 2761 [2022-01-18 05:32:55,772 INFO L226 Difference]: Without dead ends: 2743 [2022-01-18 05:32:55,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=254, Invalid=2196, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 05:32:55,772 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 111 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 789 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:55,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 98 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1605 Invalid, 0 Unknown, 789 Unchecked, 0.6s Time] [2022-01-18 05:32:55,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2743 states. [2022-01-18 05:32:55,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2743 to 2344. [2022-01-18 05:32:55,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2343 states have (on average 3.2979086641058473) internal successors, (7727), 2343 states have internal predecessors, (7727), 0 states have call successors, (0), 0 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 05:32:55,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 7727 transitions. [2022-01-18 05:32:55,801 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 7727 transitions. Word has length 24 [2022-01-18 05:32:55,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:55,801 INFO L470 AbstractCegarLoop]: Abstraction has 2344 states and 7727 transitions. [2022-01-18 05:32:55,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 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) [2022-01-18 05:32:55,801 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 7727 transitions. [2022-01-18 05:32:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:32:55,804 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:55,804 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] [2022-01-18 05:32:55,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-01-18 05:32:56,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-01-18 05:32:56,004 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:32:56,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:56,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1370690325, now seen corresponding path program 119 times [2022-01-18 05:32:56,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:56,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425627463] [2022-01-18 05:32:56,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:56,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:56,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:56,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425627463] [2022-01-18 05:32:56,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425627463] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:56,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225481569] [2022-01-18 05:32:56,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:32:56,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:56,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:56,245 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:32:56,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-01-18 05:32:56,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:32:56,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:32:56,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:32:56,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:56,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:56,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:56,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:56,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:56,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:32:56,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:56,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:56,781 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:32:56,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:32:56,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:56,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:56,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:56,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:32:56,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:32:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:56,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225481569] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:56,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:56,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:32:56,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247870557] [2022-01-18 05:32:56,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:56,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:32:56,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:56,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:32:56,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:32:56,843 INFO L87 Difference]: Start difference. First operand 2344 states and 7727 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:58,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:32:58,303 INFO L93 Difference]: Finished difference Result 2736 states and 8917 transitions. [2022-01-18 05:32:58,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 05:32:58,304 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:32:58,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:32:58,308 INFO L225 Difference]: With dead ends: 2736 [2022-01-18 05:32:58,308 INFO L226 Difference]: Without dead ends: 2717 [2022-01-18 05:32:58,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=252, Invalid=2198, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 05:32:58,308 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 164 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 2486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 798 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:32:58,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 122 Invalid, 2486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1614 Invalid, 0 Unknown, 798 Unchecked, 0.7s Time] [2022-01-18 05:32:58,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2717 states. [2022-01-18 05:32:58,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2717 to 2356. [2022-01-18 05:32:58,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 3.3002123142250532) internal successors, (7772), 2355 states have internal predecessors, (7772), 0 states have call successors, (0), 0 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 05:32:58,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 7772 transitions. [2022-01-18 05:32:58,339 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 7772 transitions. Word has length 24 [2022-01-18 05:32:58,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:32:58,339 INFO L470 AbstractCegarLoop]: Abstraction has 2356 states and 7772 transitions. [2022-01-18 05:32:58,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:32:58,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 7772 transitions. [2022-01-18 05:32:58,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:32:58,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:32:58,342 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] [2022-01-18 05:32:58,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-01-18 05:32:58,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-01-18 05:32:58,542 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:32:58,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:32:58,543 INFO L85 PathProgramCache]: Analyzing trace with hash -2109846473, now seen corresponding path program 120 times [2022-01-18 05:32:58,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:32:58,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651279119] [2022-01-18 05:32:58,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:32:58,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:32:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:32:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:58,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:32:58,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651279119] [2022-01-18 05:32:58,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651279119] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:32:58,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248046274] [2022-01-18 05:32:58,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:32:58,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:32:58,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:32:58,792 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:32:58,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-01-18 05:32:58,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 05:32:58,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:32:58,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:32:58,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:32:59,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:59,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:32:59,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-01-18 05:32:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:59,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:32:59,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:32:59,577 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:32:59,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-01-18 05:32:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:32:59,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248046274] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:32:59,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:32:59,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:32:59,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301505549] [2022-01-18 05:32:59,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:32:59,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:32:59,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:32:59,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:32:59,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:32:59,670 INFO L87 Difference]: Start difference. First operand 2356 states and 7772 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:00,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:00,857 INFO L93 Difference]: Finished difference Result 2620 states and 8615 transitions. [2022-01-18 05:33:00,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 05:33:00,858 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:33:00,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:00,862 INFO L225 Difference]: With dead ends: 2620 [2022-01-18 05:33:00,862 INFO L226 Difference]: Without dead ends: 2613 [2022-01-18 05:33:00,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=237, Invalid=1833, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:33:00,862 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 117 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 1530 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:00,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 109 Invalid, 1791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1530 Invalid, 0 Unknown, 212 Unchecked, 0.6s Time] [2022-01-18 05:33:00,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2022-01-18 05:33:00,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2357. [2022-01-18 05:33:00,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2357 states, 2356 states have (on average 3.299660441426146) internal successors, (7774), 2356 states have internal predecessors, (7774), 0 states have call successors, (0), 0 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 05:33:00,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 7774 transitions. [2022-01-18 05:33:00,892 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 7774 transitions. Word has length 24 [2022-01-18 05:33:00,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:00,892 INFO L470 AbstractCegarLoop]: Abstraction has 2357 states and 7774 transitions. [2022-01-18 05:33:00,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:00,892 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 7774 transitions. [2022-01-18 05:33:00,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:33:00,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:00,895 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] [2022-01-18 05:33:00,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-01-18 05:33:01,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-01-18 05:33:01,095 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:33:01,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:01,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1351382383, now seen corresponding path program 121 times [2022-01-18 05:33:01,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:01,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873453135] [2022-01-18 05:33:01,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:01,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:01,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:01,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873453135] [2022-01-18 05:33:01,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873453135] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:01,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681292530] [2022-01-18 05:33:01,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:33:01,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:01,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:01,341 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:33:01,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-01-18 05:33:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:01,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:33:01,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:01,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:01,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:01,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:01,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:01,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2022-01-18 05:33:01,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:01,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:01,848 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:33:01,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:33:01,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:01,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:01,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:01,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:01,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:33:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:01,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681292530] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:01,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:01,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:33:01,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421615051] [2022-01-18 05:33:01,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:01,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:33:01,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:01,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:33:01,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:33:01,913 INFO L87 Difference]: Start difference. First operand 2357 states and 7774 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:03,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:03,033 INFO L93 Difference]: Finished difference Result 2680 states and 8841 transitions. [2022-01-18 05:33:03,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 05:33:03,034 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:33:03,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:03,038 INFO L225 Difference]: With dead ends: 2680 [2022-01-18 05:33:03,038 INFO L226 Difference]: Without dead ends: 2665 [2022-01-18 05:33:03,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=211, Invalid=1769, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 05:33:03,039 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 71 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:03,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 89 Invalid, 1787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1496 Invalid, 0 Unknown, 250 Unchecked, 0.6s Time] [2022-01-18 05:33:03,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2022-01-18 05:33:03,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 2367. [2022-01-18 05:33:03,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 2366 states have (on average 3.3026204564666104) internal successors, (7814), 2366 states have internal predecessors, (7814), 0 states have call successors, (0), 0 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 05:33:03,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 7814 transitions. [2022-01-18 05:33:03,080 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 7814 transitions. Word has length 24 [2022-01-18 05:33:03,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:03,080 INFO L470 AbstractCegarLoop]: Abstraction has 2367 states and 7814 transitions. [2022-01-18 05:33:03,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:03,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 7814 transitions. [2022-01-18 05:33:03,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:33:03,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:03,083 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] [2022-01-18 05:33:03,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2022-01-18 05:33:03,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:03,283 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:33:03,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:03,284 INFO L85 PathProgramCache]: Analyzing trace with hash -906129461, now seen corresponding path program 122 times [2022-01-18 05:33:03,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:03,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457755149] [2022-01-18 05:33:03,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:03,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:03,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:03,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457755149] [2022-01-18 05:33:03,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457755149] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:03,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723153292] [2022-01-18 05:33:03,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:33:03,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:03,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:03,501 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:33:03,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-01-18 05:33:03,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:33:03,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:03,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:33:03,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:03,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:03,734 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:33:03,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-01-18 05:33:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:03,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:04,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:04,270 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:33:04,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-01-18 05:33:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:04,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723153292] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:04,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:04,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:33:04,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735079645] [2022-01-18 05:33:04,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:04,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:33:04,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:04,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:33:04,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:33:04,366 INFO L87 Difference]: Start difference. First operand 2367 states and 7814 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:05,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:05,310 INFO L93 Difference]: Finished difference Result 2581 states and 8508 transitions. [2022-01-18 05:33:05,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 05:33:05,310 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:33:05,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:05,315 INFO L225 Difference]: With dead ends: 2581 [2022-01-18 05:33:05,315 INFO L226 Difference]: Without dead ends: 2575 [2022-01-18 05:33:05,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=187, Invalid=1373, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 05:33:05,315 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 94 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 1432 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 306 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:05,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 113 Invalid, 1777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1432 Invalid, 0 Unknown, 306 Unchecked, 0.6s Time] [2022-01-18 05:33:05,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2575 states. [2022-01-18 05:33:05,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2575 to 2371. [2022-01-18 05:33:05,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2371 states, 2370 states have (on average 3.3042194092827004) internal successors, (7831), 2370 states have internal predecessors, (7831), 0 states have call successors, (0), 0 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 05:33:05,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2371 states to 2371 states and 7831 transitions. [2022-01-18 05:33:05,359 INFO L78 Accepts]: Start accepts. Automaton has 2371 states and 7831 transitions. Word has length 24 [2022-01-18 05:33:05,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:05,359 INFO L470 AbstractCegarLoop]: Abstraction has 2371 states and 7831 transitions. [2022-01-18 05:33:05,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:05,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2371 states and 7831 transitions. [2022-01-18 05:33:05,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:33:05,362 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:05,362 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] [2022-01-18 05:33:05,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2022-01-18 05:33:05,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:05,562 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:33:05,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:05,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1986637321, now seen corresponding path program 123 times [2022-01-18 05:33:05,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:05,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022928946] [2022-01-18 05:33:05,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:05,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:05,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:05,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022928946] [2022-01-18 05:33:05,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022928946] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:05,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901650388] [2022-01-18 05:33:05,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:33:05,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:05,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:05,778 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:33:05,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-01-18 05:33:05,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 05:33:05,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:05,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:33:05,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:05,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:05,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:05,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:33:05,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 60 [2022-01-18 05:33:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:06,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:06,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:06,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:06,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:06,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:06,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2022-01-18 05:33:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:06,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901650388] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:06,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:06,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-01-18 05:33:06,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471273935] [2022-01-18 05:33:06,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:06,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:33:06,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:06,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:33:06,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:33:06,746 INFO L87 Difference]: Start difference. First operand 2371 states and 7831 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:09,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:09,322 INFO L93 Difference]: Finished difference Result 3227 states and 10485 transitions. [2022-01-18 05:33:09,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 05:33:09,322 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:33:09,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:09,328 INFO L225 Difference]: With dead ends: 3227 [2022-01-18 05:33:09,328 INFO L226 Difference]: Without dead ends: 3207 [2022-01-18 05:33:09,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=441, Invalid=3849, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 05:33:09,328 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 246 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 2015 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 2978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 891 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:09,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 114 Invalid, 2978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2015 Invalid, 0 Unknown, 891 Unchecked, 0.9s Time] [2022-01-18 05:33:09,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-01-18 05:33:09,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 2400. [2022-01-18 05:33:09,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 3.303876615256357) internal successors, (7926), 2399 states have internal predecessors, (7926), 0 states have call successors, (0), 0 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 05:33:09,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 7926 transitions. [2022-01-18 05:33:09,361 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 7926 transitions. Word has length 24 [2022-01-18 05:33:09,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:09,361 INFO L470 AbstractCegarLoop]: Abstraction has 2400 states and 7926 transitions. [2022-01-18 05:33:09,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:09,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 7926 transitions. [2022-01-18 05:33:09,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:33:09,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:09,364 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] [2022-01-18 05:33:09,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-01-18 05:33:09,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-01-18 05:33:09,565 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:33:09,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:09,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1846621901, now seen corresponding path program 124 times [2022-01-18 05:33:09,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:09,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55675992] [2022-01-18 05:33:09,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:09,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:09,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:09,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:09,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55675992] [2022-01-18 05:33:09,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55675992] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:09,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342884193] [2022-01-18 05:33:09,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:33:09,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:09,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:09,783 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:33:09,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-01-18 05:33:09,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:33:09,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:09,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:33:09,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:09,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:09,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:09,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:09,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:09,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-01-18 05:33:10,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:10,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:10,280 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:33:10,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:33:10,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:10,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:10,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:10,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:10,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:33:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:10,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342884193] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:10,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:10,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:33:10,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057428704] [2022-01-18 05:33:10,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:10,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:33:10,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:10,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:33:10,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:33:10,346 INFO L87 Difference]: Start difference. First operand 2400 states and 7926 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 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) [2022-01-18 05:33:11,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:11,783 INFO L93 Difference]: Finished difference Result 2831 states and 9332 transitions. [2022-01-18 05:33:11,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 05:33:11,783 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 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) Word has length 24 [2022-01-18 05:33:11,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:11,788 INFO L225 Difference]: With dead ends: 2831 [2022-01-18 05:33:11,788 INFO L226 Difference]: Without dead ends: 2813 [2022-01-18 05:33:11,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=294, Invalid=2358, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 05:33:11,789 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 117 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 1636 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 2224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 538 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:11,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 101 Invalid, 2224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1636 Invalid, 0 Unknown, 538 Unchecked, 0.6s Time] [2022-01-18 05:33:11,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2813 states. [2022-01-18 05:33:11,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2813 to 2436. [2022-01-18 05:33:11,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2436 states, 2435 states have (on average 3.313757700205339) internal successors, (8069), 2435 states have internal predecessors, (8069), 0 states have call successors, (0), 0 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 05:33:11,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 8069 transitions. [2022-01-18 05:33:11,819 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 8069 transitions. Word has length 24 [2022-01-18 05:33:11,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:11,819 INFO L470 AbstractCegarLoop]: Abstraction has 2436 states and 8069 transitions. [2022-01-18 05:33:11,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 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) [2022-01-18 05:33:11,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 8069 transitions. [2022-01-18 05:33:11,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:33:11,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:11,822 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] [2022-01-18 05:33:11,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2022-01-18 05:33:12,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2022-01-18 05:33:12,023 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:33:12,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:12,023 INFO L85 PathProgramCache]: Analyzing trace with hash -338560521, now seen corresponding path program 125 times [2022-01-18 05:33:12,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:12,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898371588] [2022-01-18 05:33:12,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:12,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:12,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:12,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898371588] [2022-01-18 05:33:12,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898371588] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:12,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215405358] [2022-01-18 05:33:12,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:33:12,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:12,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:12,248 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:33:12,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-01-18 05:33:12,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 05:33:12,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:12,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:33:12,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:12,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:12,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:12,456 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:33:12,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2022-01-18 05:33:12,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:12,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:12,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:12,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:12,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:33:12,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 37 [2022-01-18 05:33:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:12,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215405358] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:12,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:12,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2022-01-18 05:33:12,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722333309] [2022-01-18 05:33:12,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:12,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 05:33:12,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:12,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 05:33:12,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:33:12,862 INFO L87 Difference]: Start difference. First operand 2436 states and 8069 transitions. Second operand has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:33:16,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:16,117 INFO L93 Difference]: Finished difference Result 3014 states and 9665 transitions. [2022-01-18 05:33:16,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 05:33:16,117 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:33:16,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:16,122 INFO L225 Difference]: With dead ends: 3014 [2022-01-18 05:33:16,123 INFO L226 Difference]: Without dead ends: 2999 [2022-01-18 05:33:16,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=661, Invalid=5981, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 05:33:16,123 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 343 mSDsluCounter, 2220 mSDsCounter, 0 mSdLazyCounter, 3793 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 3896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 3793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:16,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 378 Invalid, 3896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 3793 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 05:33:16,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2999 states. [2022-01-18 05:33:16,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2999 to 2444. [2022-01-18 05:33:16,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2444 states, 2443 states have (on average 3.316823577568563) internal successors, (8103), 2443 states have internal predecessors, (8103), 0 states have call successors, (0), 0 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 05:33:16,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2444 states to 2444 states and 8103 transitions. [2022-01-18 05:33:16,161 INFO L78 Accepts]: Start accepts. Automaton has 2444 states and 8103 transitions. Word has length 24 [2022-01-18 05:33:16,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:16,161 INFO L470 AbstractCegarLoop]: Abstraction has 2444 states and 8103 transitions. [2022-01-18 05:33:16,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 05:33:16,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2444 states and 8103 transitions. [2022-01-18 05:33:16,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:33:16,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:16,164 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] [2022-01-18 05:33:16,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-01-18 05:33:16,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2022-01-18 05:33:16,364 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:33:16,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:16,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1851008737, now seen corresponding path program 126 times [2022-01-18 05:33:16,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:16,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459078388] [2022-01-18 05:33:16,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:16,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:16,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:16,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459078388] [2022-01-18 05:33:16,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459078388] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:16,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677399670] [2022-01-18 05:33:16,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:33:16,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:16,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:16,583 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:33:16,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-01-18 05:33:16,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 05:33:16,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:16,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:33:16,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:16,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:16,820 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:33:16,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-01-18 05:33:17,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:17,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:17,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:17,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:33:17,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 55 [2022-01-18 05:33:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:17,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677399670] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:17,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:17,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-18 05:33:17,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008550777] [2022-01-18 05:33:17,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:17,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:33:17,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:17,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:33:17,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:33:17,514 INFO L87 Difference]: Start difference. First operand 2444 states and 8103 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:18,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:18,775 INFO L93 Difference]: Finished difference Result 2687 states and 8873 transitions. [2022-01-18 05:33:18,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 05:33:18,775 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:33:18,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:18,780 INFO L225 Difference]: With dead ends: 2687 [2022-01-18 05:33:18,780 INFO L226 Difference]: Without dead ends: 2673 [2022-01-18 05:33:18,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=233, Invalid=1573, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 05:33:18,783 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 90 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 1975 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 2267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:18,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 98 Invalid, 2267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1975 Invalid, 0 Unknown, 262 Unchecked, 0.8s Time] [2022-01-18 05:33:18,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2022-01-18 05:33:18,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 2448. [2022-01-18 05:33:18,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2447 states have (on average 3.315488353085411) internal successors, (8113), 2447 states have internal predecessors, (8113), 0 states have call successors, (0), 0 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 05:33:18,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 8113 transitions. [2022-01-18 05:33:18,813 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 8113 transitions. Word has length 24 [2022-01-18 05:33:18,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:18,813 INFO L470 AbstractCegarLoop]: Abstraction has 2448 states and 8113 transitions. [2022-01-18 05:33:18,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:18,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 8113 transitions. [2022-01-18 05:33:18,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:33:18,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:18,816 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] [2022-01-18 05:33:18,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-01-18 05:33:19,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:19,017 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:33:19,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:19,017 INFO L85 PathProgramCache]: Analyzing trace with hash -66820087, now seen corresponding path program 127 times [2022-01-18 05:33:19,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:19,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334968681] [2022-01-18 05:33:19,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:19,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:19,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:19,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334968681] [2022-01-18 05:33:19,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334968681] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:19,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506389374] [2022-01-18 05:33:19,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:33:19,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:19,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:19,273 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:33:19,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-01-18 05:33:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:19,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:33:19,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:19,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:19,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:19,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:19,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:19,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-01-18 05:33:19,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:19,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:19,777 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:33:19,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:33:19,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:19,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:19,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:19,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:19,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:33:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:19,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506389374] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:19,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:19,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:33:19,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940953743] [2022-01-18 05:33:19,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:19,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:33:19,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:19,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:33:19,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:33:19,840 INFO L87 Difference]: Start difference. First operand 2448 states and 8113 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 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) [2022-01-18 05:33:21,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:21,316 INFO L93 Difference]: Finished difference Result 2794 states and 9212 transitions. [2022-01-18 05:33:21,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 05:33:21,316 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 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) Word has length 24 [2022-01-18 05:33:21,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:21,321 INFO L225 Difference]: With dead ends: 2794 [2022-01-18 05:33:21,321 INFO L226 Difference]: Without dead ends: 2777 [2022-01-18 05:33:21,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=282, Invalid=2474, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 05:33:21,322 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 110 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 1884 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 2405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:21,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 99 Invalid, 2405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1884 Invalid, 0 Unknown, 480 Unchecked, 0.7s Time] [2022-01-18 05:33:21,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2777 states. [2022-01-18 05:33:21,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2777 to 2474. [2022-01-18 05:33:21,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2474 states, 2473 states have (on average 3.3255155681358675) internal successors, (8224), 2473 states have internal predecessors, (8224), 0 states have call successors, (0), 0 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 05:33:21,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2474 states to 2474 states and 8224 transitions. [2022-01-18 05:33:21,354 INFO L78 Accepts]: Start accepts. Automaton has 2474 states and 8224 transitions. Word has length 24 [2022-01-18 05:33:21,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:21,354 INFO L470 AbstractCegarLoop]: Abstraction has 2474 states and 8224 transitions. [2022-01-18 05:33:21,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 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) [2022-01-18 05:33:21,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2474 states and 8224 transitions. [2022-01-18 05:33:21,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:33:21,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:21,357 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] [2022-01-18 05:33:21,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-01-18 05:33:21,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:21,557 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:33:21,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:21,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1667257941, now seen corresponding path program 128 times [2022-01-18 05:33:21,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:21,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499888793] [2022-01-18 05:33:21,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:21,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:21,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:21,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:21,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499888793] [2022-01-18 05:33:21,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499888793] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:21,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688861980] [2022-01-18 05:33:21,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:33:21,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:21,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:21,773 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:33:21,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-01-18 05:33:21,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:33:21,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:21,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:33:21,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:22,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:22,014 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:33:22,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-01-18 05:33:22,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:22,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:22,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:22,616 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:33:22,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 55 [2022-01-18 05:33:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:22,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688861980] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:22,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:22,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-18 05:33:22,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358425425] [2022-01-18 05:33:22,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:22,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:33:22,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:22,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:33:22,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:33:22,694 INFO L87 Difference]: Start difference. First operand 2474 states and 8224 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:23,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:23,888 INFO L93 Difference]: Finished difference Result 2838 states and 9378 transitions. [2022-01-18 05:33:23,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 05:33:23,888 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:33:23,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:23,893 INFO L225 Difference]: With dead ends: 2838 [2022-01-18 05:33:23,893 INFO L226 Difference]: Without dead ends: 2823 [2022-01-18 05:33:23,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=216, Invalid=1676, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 05:33:23,894 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 126 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 1753 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 2319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 527 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:23,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 101 Invalid, 2319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1753 Invalid, 0 Unknown, 527 Unchecked, 0.7s Time] [2022-01-18 05:33:23,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2022-01-18 05:33:23,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2498. [2022-01-18 05:33:23,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 2497 states have (on average 3.329195034040849) internal successors, (8313), 2497 states have internal predecessors, (8313), 0 states have call successors, (0), 0 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 05:33:23,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 8313 transitions. [2022-01-18 05:33:23,924 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 8313 transitions. Word has length 24 [2022-01-18 05:33:23,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:23,925 INFO L470 AbstractCegarLoop]: Abstraction has 2498 states and 8313 transitions. [2022-01-18 05:33:23,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:23,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 8313 transitions. [2022-01-18 05:33:23,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:33:23,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:23,928 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] [2022-01-18 05:33:23,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-01-18 05:33:24,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:24,128 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:33:24,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:24,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1534073149, now seen corresponding path program 129 times [2022-01-18 05:33:24,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:24,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170989357] [2022-01-18 05:33:24,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:24,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:24,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:24,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:24,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170989357] [2022-01-18 05:33:24,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170989357] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:24,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326898900] [2022-01-18 05:33:24,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:33:24,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:24,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:24,380 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:33:24,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-01-18 05:33:24,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:33:24,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:24,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:33:24,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:24,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:24,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:24,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:24,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:24,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-01-18 05:33:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:24,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:25,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:25,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:33:25,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-01-18 05:33:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:25,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326898900] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:25,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:25,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:33:25,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911670911] [2022-01-18 05:33:25,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:25,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:33:25,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:25,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:33:25,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:33:25,218 INFO L87 Difference]: Start difference. First operand 2498 states and 8313 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:26,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:26,161 INFO L93 Difference]: Finished difference Result 2856 states and 9431 transitions. [2022-01-18 05:33:26,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:33:26,161 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:33:26,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:26,166 INFO L225 Difference]: With dead ends: 2856 [2022-01-18 05:33:26,166 INFO L226 Difference]: Without dead ends: 2850 [2022-01-18 05:33:26,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=157, Invalid=1483, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 05:33:26,167 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 99 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 418 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:26,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 110 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1389 Invalid, 0 Unknown, 418 Unchecked, 0.5s Time] [2022-01-18 05:33:26,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2022-01-18 05:33:26,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 2500. [2022-01-18 05:33:26,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2500 states, 2499 states have (on average 3.3297318927571027) internal successors, (8321), 2499 states have internal predecessors, (8321), 0 states have call successors, (0), 0 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 05:33:26,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2500 states to 2500 states and 8321 transitions. [2022-01-18 05:33:26,198 INFO L78 Accepts]: Start accepts. Automaton has 2500 states and 8321 transitions. Word has length 24 [2022-01-18 05:33:26,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:26,199 INFO L470 AbstractCegarLoop]: Abstraction has 2500 states and 8321 transitions. [2022-01-18 05:33:26,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:26,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2500 states and 8321 transitions. [2022-01-18 05:33:26,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:33:26,202 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:26,202 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] [2022-01-18 05:33:26,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-01-18 05:33:26,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-01-18 05:33:26,402 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:33:26,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:26,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1436105503, now seen corresponding path program 130 times [2022-01-18 05:33:26,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:26,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300078595] [2022-01-18 05:33:26,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:26,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:26,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:26,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300078595] [2022-01-18 05:33:26,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300078595] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:26,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184291724] [2022-01-18 05:33:26,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:33:26,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:26,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:26,619 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:33:26,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-01-18 05:33:26,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:33:26,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:26,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:33:26,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:26,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:26,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:26,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:26,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:26,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:33:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:26,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:27,181 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:33:27,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:33:27,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:27,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:27,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:27,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:27,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:33:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:27,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184291724] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:27,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:27,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:33:27,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164048660] [2022-01-18 05:33:27,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:27,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:33:27,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:27,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:33:27,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:33:27,279 INFO L87 Difference]: Start difference. First operand 2500 states and 8321 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:28,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:28,323 INFO L93 Difference]: Finished difference Result 2894 states and 9561 transitions. [2022-01-18 05:33:28,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 05:33:28,323 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:33:28,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:28,328 INFO L225 Difference]: With dead ends: 2894 [2022-01-18 05:33:28,328 INFO L226 Difference]: Without dead ends: 2886 [2022-01-18 05:33:28,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 05:33:28,328 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 78 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:28,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 93 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1366 Invalid, 0 Unknown, 295 Unchecked, 0.5s Time] [2022-01-18 05:33:28,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2886 states. [2022-01-18 05:33:28,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2886 to 2501. [2022-01-18 05:33:28,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2500 states have (on average 3.3304) internal successors, (8326), 2500 states have internal predecessors, (8326), 0 states have call successors, (0), 0 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 05:33:28,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 8326 transitions. [2022-01-18 05:33:28,359 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 8326 transitions. Word has length 24 [2022-01-18 05:33:28,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:28,359 INFO L470 AbstractCegarLoop]: Abstraction has 2501 states and 8326 transitions. [2022-01-18 05:33:28,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:28,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 8326 transitions. [2022-01-18 05:33:28,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:33:28,362 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:28,362 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] [2022-01-18 05:33:28,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-01-18 05:33:28,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-01-18 05:33:28,563 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:33:28,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:28,563 INFO L85 PathProgramCache]: Analyzing trace with hash -2084000377, now seen corresponding path program 131 times [2022-01-18 05:33:28,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:28,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772417121] [2022-01-18 05:33:28,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:28,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:28,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:28,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:28,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772417121] [2022-01-18 05:33:28,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772417121] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:28,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367173908] [2022-01-18 05:33:28,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:33:28,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:28,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:28,796 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:33:28,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-01-18 05:33:28,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:33:28,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:28,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:33:28,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:29,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:29,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:29,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:29,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:29,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:33:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:29,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:29,341 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:33:29,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:33:29,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:29,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:29,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:29,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:29,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:33:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:29,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367173908] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:29,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:29,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:33:29,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364633992] [2022-01-18 05:33:29,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:29,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:33:29,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:29,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:33:29,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:33:29,414 INFO L87 Difference]: Start difference. First operand 2501 states and 8326 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:30,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:30,583 INFO L93 Difference]: Finished difference Result 3110 states and 10102 transitions. [2022-01-18 05:33:30,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 05:33:30,583 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:33:30,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:30,588 INFO L225 Difference]: With dead ends: 3110 [2022-01-18 05:33:30,588 INFO L226 Difference]: Without dead ends: 3101 [2022-01-18 05:33:30,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=173, Invalid=1633, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 05:33:30,589 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 117 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 2483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 846 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:30,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 167 Invalid, 2483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1605 Invalid, 0 Unknown, 846 Unchecked, 0.6s Time] [2022-01-18 05:33:30,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2022-01-18 05:33:30,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 2505. [2022-01-18 05:33:30,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2505 states, 2504 states have (on average 3.332667731629393) internal successors, (8345), 2504 states have internal predecessors, (8345), 0 states have call successors, (0), 0 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 05:33:30,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2505 states to 2505 states and 8345 transitions. [2022-01-18 05:33:30,619 INFO L78 Accepts]: Start accepts. Automaton has 2505 states and 8345 transitions. Word has length 24 [2022-01-18 05:33:30,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:30,620 INFO L470 AbstractCegarLoop]: Abstraction has 2505 states and 8345 transitions. [2022-01-18 05:33:30,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:30,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2505 states and 8345 transitions. [2022-01-18 05:33:30,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:33:30,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:30,623 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] [2022-01-18 05:33:30,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-01-18 05:33:30,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-01-18 05:33:30,823 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:33:30,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:30,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1481789116, now seen corresponding path program 17 times [2022-01-18 05:33:30,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:30,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828897273] [2022-01-18 05:33:30,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:30,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:31,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:31,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828897273] [2022-01-18 05:33:31,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828897273] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:31,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17216509] [2022-01-18 05:33:31,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:33:31,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:31,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:31,040 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:33:31,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-01-18 05:33:31,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:33:31,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:31,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:33:31,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:31,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:31,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:31,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:31,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:31,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:33:31,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:31,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:31,585 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:33:31,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:33:31,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:31,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:31,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:31,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:31,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:33:31,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:31,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17216509] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:31,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:31,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:33:31,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054030958] [2022-01-18 05:33:31,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:31,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:33:31,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:31,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:33:31,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:33:31,655 INFO L87 Difference]: Start difference. First operand 2505 states and 8345 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:32,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:32,732 INFO L93 Difference]: Finished difference Result 2907 states and 9603 transitions. [2022-01-18 05:33:32,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 05:33:32,733 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:33:32,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:32,738 INFO L225 Difference]: With dead ends: 2907 [2022-01-18 05:33:32,738 INFO L226 Difference]: Without dead ends: 2900 [2022-01-18 05:33:32,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 05:33:32,738 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 94 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:32,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 86 Invalid, 1725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1458 Invalid, 0 Unknown, 230 Unchecked, 0.5s Time] [2022-01-18 05:33:32,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2900 states. [2022-01-18 05:33:32,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2900 to 2503. [2022-01-18 05:33:32,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2503 states, 2502 states have (on average 3.332933653077538) internal successors, (8339), 2502 states have internal predecessors, (8339), 0 states have call successors, (0), 0 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 05:33:32,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2503 states to 2503 states and 8339 transitions. [2022-01-18 05:33:32,769 INFO L78 Accepts]: Start accepts. Automaton has 2503 states and 8339 transitions. Word has length 24 [2022-01-18 05:33:32,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:32,769 INFO L470 AbstractCegarLoop]: Abstraction has 2503 states and 8339 transitions. [2022-01-18 05:33:32,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:32,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2503 states and 8339 transitions. [2022-01-18 05:33:32,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:33:32,772 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:32,772 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] [2022-01-18 05:33:32,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-01-18 05:33:32,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-01-18 05:33:32,973 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:33:32,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:32,973 INFO L85 PathProgramCache]: Analyzing trace with hash 73429867, now seen corresponding path program 132 times [2022-01-18 05:33:32,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:32,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47654283] [2022-01-18 05:33:32,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:32,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:33,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:33,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47654283] [2022-01-18 05:33:33,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47654283] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:33,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895278981] [2022-01-18 05:33:33,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:33:33,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:33,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:33,196 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:33:33,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-01-18 05:33:33,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:33:33,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:33,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 05:33:33,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:33,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:33,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:33,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:33,574 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:33:33,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 43 [2022-01-18 05:33:33,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:33,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:34,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:34,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:34,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:34,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:34,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 7 [2022-01-18 05:33:34,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:34,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895278981] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:34,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:34,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-01-18 05:33:34,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12039604] [2022-01-18 05:33:34,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:34,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:33:34,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:34,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:33:34,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=846, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:33:34,463 INFO L87 Difference]: Start difference. First operand 2503 states and 8339 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:33:36,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:36,329 INFO L93 Difference]: Finished difference Result 3159 states and 10415 transitions. [2022-01-18 05:33:36,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 05:33:36,329 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:33:36,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:36,335 INFO L225 Difference]: With dead ends: 3159 [2022-01-18 05:33:36,335 INFO L226 Difference]: Without dead ends: 3151 [2022-01-18 05:33:36,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=343, Invalid=3947, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 05:33:36,336 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 143 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 615 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:36,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 123 Invalid, 1945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1279 Invalid, 0 Unknown, 615 Unchecked, 0.5s Time] [2022-01-18 05:33:36,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2022-01-18 05:33:36,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2503. [2022-01-18 05:33:36,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2503 states, 2502 states have (on average 3.332933653077538) internal successors, (8339), 2502 states have internal predecessors, (8339), 0 states have call successors, (0), 0 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 05:33:36,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2503 states to 2503 states and 8339 transitions. [2022-01-18 05:33:36,368 INFO L78 Accepts]: Start accepts. Automaton has 2503 states and 8339 transitions. Word has length 24 [2022-01-18 05:33:36,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:36,369 INFO L470 AbstractCegarLoop]: Abstraction has 2503 states and 8339 transitions. [2022-01-18 05:33:36,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:33:36,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2503 states and 8339 transitions. [2022-01-18 05:33:36,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:33:36,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:36,372 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] [2022-01-18 05:33:36,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2022-01-18 05:33:36,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2022-01-18 05:33:36,572 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:33:36,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:36,572 INFO L85 PathProgramCache]: Analyzing trace with hash 2115913133, now seen corresponding path program 133 times [2022-01-18 05:33:36,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:36,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265595769] [2022-01-18 05:33:36,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:36,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:36,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:36,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:36,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265595769] [2022-01-18 05:33:36,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265595769] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:36,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649687875] [2022-01-18 05:33:36,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:33:36,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:36,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:36,799 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:33:36,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-01-18 05:33:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:36,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:33:36,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:37,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:37,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:37,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:37,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:37,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:33:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:37,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:37,371 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:33:37,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:33:37,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:37,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:37,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:37,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:37,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:33:37,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:37,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649687875] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:37,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:37,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:33:37,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922830110] [2022-01-18 05:33:37,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:37,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:33:37,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:37,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:33:37,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:33:37,427 INFO L87 Difference]: Start difference. First operand 2503 states and 8339 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:38,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:38,697 INFO L93 Difference]: Finished difference Result 3031 states and 9878 transitions. [2022-01-18 05:33:38,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 05:33:38,698 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:33:38,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:38,704 INFO L225 Difference]: With dead ends: 3031 [2022-01-18 05:33:38,705 INFO L226 Difference]: Without dead ends: 3024 [2022-01-18 05:33:38,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=187, Invalid=1883, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:33:38,705 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 159 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 2226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 781 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:38,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 210 Invalid, 2226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1398 Invalid, 0 Unknown, 781 Unchecked, 0.6s Time] [2022-01-18 05:33:38,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2022-01-18 05:33:38,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 2486. [2022-01-18 05:33:38,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 3.3356136820925553) internal successors, (8289), 2485 states have internal predecessors, (8289), 0 states have call successors, (0), 0 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 05:33:38,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 8289 transitions. [2022-01-18 05:33:38,740 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 8289 transitions. Word has length 24 [2022-01-18 05:33:38,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:38,741 INFO L470 AbstractCegarLoop]: Abstraction has 2486 states and 8289 transitions. [2022-01-18 05:33:38,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:38,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 8289 transitions. [2022-01-18 05:33:38,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:33:38,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:38,744 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] [2022-01-18 05:33:38,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-01-18 05:33:38,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2022-01-18 05:33:38,944 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:33:38,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:38,944 INFO L85 PathProgramCache]: Analyzing trace with hash -284422353, now seen corresponding path program 134 times [2022-01-18 05:33:38,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:38,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542846565] [2022-01-18 05:33:38,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:38,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:39,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:39,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542846565] [2022-01-18 05:33:39,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542846565] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:39,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334044610] [2022-01-18 05:33:39,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:33:39,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:39,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:39,172 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:33:39,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-01-18 05:33:39,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:33:39,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:39,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:33:39,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:39,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:39,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:39,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:39,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:33:39,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 05:33:39,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:39,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:40,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:40,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:40,154 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:33:40,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:33:40,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:40,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334044610] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:40,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:40,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:33:40,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927874276] [2022-01-18 05:33:40,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:40,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:33:40,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:40,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:33:40,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:33:40,303 INFO L87 Difference]: Start difference. First operand 2486 states and 8289 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:33:42,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:42,209 INFO L93 Difference]: Finished difference Result 3517 states and 11744 transitions. [2022-01-18 05:33:42,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 05:33:42,210 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:33:42,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:42,216 INFO L225 Difference]: With dead ends: 3517 [2022-01-18 05:33:42,216 INFO L226 Difference]: Without dead ends: 3513 [2022-01-18 05:33:42,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=323, Invalid=2869, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 05:33:42,217 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 103 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 785 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:42,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 249 Invalid, 1922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1110 Invalid, 0 Unknown, 785 Unchecked, 0.5s Time] [2022-01-18 05:33:42,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3513 states. [2022-01-18 05:33:42,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3513 to 2498. [2022-01-18 05:33:42,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 2497 states have (on average 3.3360032038446135) internal successors, (8330), 2497 states have internal predecessors, (8330), 0 states have call successors, (0), 0 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 05:33:42,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 8330 transitions. [2022-01-18 05:33:42,253 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 8330 transitions. Word has length 24 [2022-01-18 05:33:42,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:42,253 INFO L470 AbstractCegarLoop]: Abstraction has 2498 states and 8330 transitions. [2022-01-18 05:33:42,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:33:42,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 8330 transitions. [2022-01-18 05:33:42,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:33:42,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:42,256 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] [2022-01-18 05:33:42,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2022-01-18 05:33:42,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:42,456 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:33:42,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:42,456 INFO L85 PathProgramCache]: Analyzing trace with hash 603081328, now seen corresponding path program 21 times [2022-01-18 05:33:42,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:42,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974303545] [2022-01-18 05:33:42,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:42,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:42,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:42,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:42,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974303545] [2022-01-18 05:33:42,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974303545] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:42,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209421840] [2022-01-18 05:33:42,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:33:42,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:42,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:42,687 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:33:42,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-01-18 05:33:42,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:33:42,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:42,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:33:42,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:43,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:43,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:43,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:43,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:43,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 05:33:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:43,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:43,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:43,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:33:43,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-01-18 05:33:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:43,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209421840] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:43,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:43,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-18 05:33:43,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27464763] [2022-01-18 05:33:43,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:43,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:33:43,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:43,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:33:43,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:33:43,534 INFO L87 Difference]: Start difference. First operand 2498 states and 8330 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:33:45,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:45,905 INFO L93 Difference]: Finished difference Result 3311 states and 10477 transitions. [2022-01-18 05:33:45,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 05:33:45,906 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:33:45,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:45,911 INFO L225 Difference]: With dead ends: 3311 [2022-01-18 05:33:45,911 INFO L226 Difference]: Without dead ends: 3279 [2022-01-18 05:33:45,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=442, Invalid=4250, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 05:33:45,912 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 341 mSDsluCounter, 1811 mSDsCounter, 0 mSdLazyCounter, 2170 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 3878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1622 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:45,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 243 Invalid, 3878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2170 Invalid, 0 Unknown, 1622 Unchecked, 0.9s Time] [2022-01-18 05:33:45,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2022-01-18 05:33:45,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 2547. [2022-01-18 05:33:45,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2547 states, 2546 states have (on average 3.332678711704635) internal successors, (8485), 2546 states have internal predecessors, (8485), 0 states have call successors, (0), 0 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 05:33:45,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 8485 transitions. [2022-01-18 05:33:45,948 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 8485 transitions. Word has length 24 [2022-01-18 05:33:45,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:45,948 INFO L470 AbstractCegarLoop]: Abstraction has 2547 states and 8485 transitions. [2022-01-18 05:33:45,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:33:45,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 8485 transitions. [2022-01-18 05:33:45,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:33:45,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:45,951 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:33:45,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-01-18 05:33:46,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-01-18 05:33:46,152 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:33:46,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:46,152 INFO L85 PathProgramCache]: Analyzing trace with hash 713052612, now seen corresponding path program 18 times [2022-01-18 05:33:46,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:46,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779157099] [2022-01-18 05:33:46,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:46,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:46,367 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:46,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:46,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779157099] [2022-01-18 05:33:46,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779157099] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:46,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497968249] [2022-01-18 05:33:46,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:33:46,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:46,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:46,369 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:33:46,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-01-18 05:33:46,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:33:46,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:46,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:33:46,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:46,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:46,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:46,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:46,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:33:46,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 05:33:46,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:46,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:47,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:47,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:47,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:33:47,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:33:47,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:47,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497968249] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:47,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:47,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:33:47,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448900897] [2022-01-18 05:33:47,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:47,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:33:47,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:47,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:33:47,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:33:47,384 INFO L87 Difference]: Start difference. First operand 2547 states and 8485 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:49,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:49,732 INFO L93 Difference]: Finished difference Result 3638 states and 12393 transitions. [2022-01-18 05:33:49,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 05:33:49,732 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:33:49,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:49,739 INFO L225 Difference]: With dead ends: 3638 [2022-01-18 05:33:49,739 INFO L226 Difference]: Without dead ends: 3625 [2022-01-18 05:33:49,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=427, Invalid=3233, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 05:33:49,740 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 165 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1486 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:49,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 94 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 996 Invalid, 0 Unknown, 1486 Unchecked, 0.4s Time] [2022-01-18 05:33:49,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3625 states. [2022-01-18 05:33:49,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3625 to 2574. [2022-01-18 05:33:49,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2574 states, 2573 states have (on average 3.3416245627671977) internal successors, (8598), 2573 states have internal predecessors, (8598), 0 states have call successors, (0), 0 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 05:33:49,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2574 states to 2574 states and 8598 transitions. [2022-01-18 05:33:49,776 INFO L78 Accepts]: Start accepts. Automaton has 2574 states and 8598 transitions. Word has length 24 [2022-01-18 05:33:49,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:49,776 INFO L470 AbstractCegarLoop]: Abstraction has 2574 states and 8598 transitions. [2022-01-18 05:33:49,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:49,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2574 states and 8598 transitions. [2022-01-18 05:33:49,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:33:49,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:49,779 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] [2022-01-18 05:33:49,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2022-01-18 05:33:49,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:49,980 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:33:49,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:49,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1363030483, now seen corresponding path program 135 times [2022-01-18 05:33:49,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:49,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563244843] [2022-01-18 05:33:49,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:49,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:50,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:50,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563244843] [2022-01-18 05:33:50,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563244843] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:50,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706598082] [2022-01-18 05:33:50,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:33:50,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:50,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:50,203 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:33:50,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-01-18 05:33:50,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:33:50,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:50,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:33:50,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:50,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:50,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:50,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:50,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:50,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:33:50,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:50,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:50,750 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:33:50,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:33:50,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:50,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:50,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:50,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:50,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:33:50,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:50,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706598082] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:50,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:50,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:33:50,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577273798] [2022-01-18 05:33:50,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:50,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:33:50,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:50,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:33:50,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:33:50,814 INFO L87 Difference]: Start difference. First operand 2574 states and 8598 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:52,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:52,197 INFO L93 Difference]: Finished difference Result 3329 states and 10831 transitions. [2022-01-18 05:33:52,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 05:33:52,198 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:33:52,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:52,203 INFO L225 Difference]: With dead ends: 3329 [2022-01-18 05:33:52,204 INFO L226 Difference]: Without dead ends: 3319 [2022-01-18 05:33:52,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=280, Invalid=2072, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 05:33:52,204 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 154 mSDsluCounter, 1488 mSDsCounter, 0 mSdLazyCounter, 1763 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 2511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 689 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:52,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 255 Invalid, 2511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1763 Invalid, 0 Unknown, 689 Unchecked, 0.7s Time] [2022-01-18 05:33:52,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2022-01-18 05:33:52,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 2587. [2022-01-18 05:33:52,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2587 states, 2586 states have (on average 3.3422273781902554) internal successors, (8643), 2586 states have internal predecessors, (8643), 0 states have call successors, (0), 0 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 05:33:52,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2587 states to 2587 states and 8643 transitions. [2022-01-18 05:33:52,239 INFO L78 Accepts]: Start accepts. Automaton has 2587 states and 8643 transitions. Word has length 24 [2022-01-18 05:33:52,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:52,239 INFO L470 AbstractCegarLoop]: Abstraction has 2587 states and 8643 transitions. [2022-01-18 05:33:52,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:52,239 INFO L276 IsEmpty]: Start isEmpty. Operand 2587 states and 8643 transitions. [2022-01-18 05:33:52,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:33:52,242 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:52,242 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] [2022-01-18 05:33:52,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-01-18 05:33:52,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2022-01-18 05:33:52,443 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:33:52,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:52,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1170717186, now seen corresponding path program 19 times [2022-01-18 05:33:52,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:52,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926344653] [2022-01-18 05:33:52,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:52,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:52,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:52,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:52,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926344653] [2022-01-18 05:33:52,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926344653] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:52,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228651865] [2022-01-18 05:33:52,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:33:52,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:52,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:52,659 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:33:52,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-01-18 05:33:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:52,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:33:52,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:52,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:52,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:52,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:52,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:52,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:33:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:52,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:53,229 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:33:53,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:33:53,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:53,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:53,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:53,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:53,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:33:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:53,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228651865] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:53,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:53,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:33:53,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500054103] [2022-01-18 05:33:53,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:53,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:33:53,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:53,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:33:53,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:33:53,298 INFO L87 Difference]: Start difference. First operand 2587 states and 8643 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:54,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:54,576 INFO L93 Difference]: Finished difference Result 3170 states and 10315 transitions. [2022-01-18 05:33:54,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 05:33:54,576 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:33:54,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:54,582 INFO L225 Difference]: With dead ends: 3170 [2022-01-18 05:33:54,582 INFO L226 Difference]: Without dead ends: 3162 [2022-01-18 05:33:54,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=165, Invalid=1641, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 05:33:54,582 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 137 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 1781 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 2469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 658 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:54,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 190 Invalid, 2469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1781 Invalid, 0 Unknown, 658 Unchecked, 0.7s Time] [2022-01-18 05:33:54,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2022-01-18 05:33:54,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 2577. [2022-01-18 05:33:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2577 states, 2576 states have (on average 3.340062111801242) internal successors, (8604), 2576 states have internal predecessors, (8604), 0 states have call successors, (0), 0 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 05:33:54,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 8604 transitions. [2022-01-18 05:33:54,616 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 8604 transitions. Word has length 24 [2022-01-18 05:33:54,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:54,616 INFO L470 AbstractCegarLoop]: Abstraction has 2577 states and 8604 transitions. [2022-01-18 05:33:54,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:54,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 8604 transitions. [2022-01-18 05:33:54,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:33:54,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:54,619 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] [2022-01-18 05:33:54,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2022-01-18 05:33:54,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:54,820 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:33:54,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:54,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1867982233, now seen corresponding path program 136 times [2022-01-18 05:33:54,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:54,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423470431] [2022-01-18 05:33:54,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:54,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:55,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:55,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423470431] [2022-01-18 05:33:55,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423470431] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:55,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563245799] [2022-01-18 05:33:55,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:33:55,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:55,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:55,048 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:33:55,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-01-18 05:33:55,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:33:55,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:55,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:33:55,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:55,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:55,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:55,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:55,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:55,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:33:55,360 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:55,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:55,612 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:33:55,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:33:55,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:55,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:55,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:55,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:55,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:33:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:55,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563245799] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:55,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:55,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:33:55,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632303377] [2022-01-18 05:33:55,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:55,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:33:55,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:55,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:33:55,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:33:55,676 INFO L87 Difference]: Start difference. First operand 2577 states and 8604 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:57,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:33:57,085 INFO L93 Difference]: Finished difference Result 3205 states and 10398 transitions. [2022-01-18 05:33:57,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 05:33:57,085 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:33:57,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:33:57,091 INFO L225 Difference]: With dead ends: 3205 [2022-01-18 05:33:57,091 INFO L226 Difference]: Without dead ends: 3196 [2022-01-18 05:33:57,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=200, Invalid=2056, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 05:33:57,091 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 180 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 1655 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 2719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1029 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:33:57,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 173 Invalid, 2719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1655 Invalid, 0 Unknown, 1029 Unchecked, 0.6s Time] [2022-01-18 05:33:57,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2022-01-18 05:33:57,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 2562. [2022-01-18 05:33:57,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2562 states, 2561 states have (on average 3.3389301054275675) internal successors, (8551), 2561 states have internal predecessors, (8551), 0 states have call successors, (0), 0 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 05:33:57,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2562 states to 2562 states and 8551 transitions. [2022-01-18 05:33:57,125 INFO L78 Accepts]: Start accepts. Automaton has 2562 states and 8551 transitions. Word has length 24 [2022-01-18 05:33:57,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:33:57,125 INFO L470 AbstractCegarLoop]: Abstraction has 2562 states and 8551 transitions. [2022-01-18 05:33:57,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:33:57,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2562 states and 8551 transitions. [2022-01-18 05:33:57,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:33:57,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:33:57,128 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] [2022-01-18 05:33:57,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-01-18 05:33:57,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-01-18 05:33:57,329 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:33:57,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:33:57,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1738899514, now seen corresponding path program 20 times [2022-01-18 05:33:57,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:33:57,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293539106] [2022-01-18 05:33:57,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:33:57,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:33:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:33:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:57,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:33:57,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293539106] [2022-01-18 05:33:57,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293539106] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:33:57,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481006810] [2022-01-18 05:33:57,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:33:57,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:33:57,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:33:57,555 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:33:57,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-01-18 05:33:57,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:33:57,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:33:57,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:33:57,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:33:57,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:57,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:33:57,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:57,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:33:57,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 05:33:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:58,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:33:58,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:58,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:33:58,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:33:58,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:33:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:33:58,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481006810] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:33:58,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:33:58,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:33:58,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127562725] [2022-01-18 05:33:58,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:33:58,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:33:58,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:33:58,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:33:58,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:33:58,615 INFO L87 Difference]: Start difference. First operand 2562 states and 8551 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:34:01,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:01,645 INFO L93 Difference]: Finished difference Result 3914 states and 13354 transitions. [2022-01-18 05:34:01,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 05:34:01,645 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:34:01,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:01,652 INFO L225 Difference]: With dead ends: 3914 [2022-01-18 05:34:01,653 INFO L226 Difference]: Without dead ends: 3907 [2022-01-18 05:34:01,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=571, Invalid=4121, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 05:34:01,653 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 160 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 2369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1270 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:01,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 189 Invalid, 2369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1038 Invalid, 0 Unknown, 1270 Unchecked, 0.5s Time] [2022-01-18 05:34:01,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2022-01-18 05:34:01,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 2586. [2022-01-18 05:34:01,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2586 states, 2585 states have (on average 3.34468085106383) internal successors, (8646), 2585 states have internal predecessors, (8646), 0 states have call successors, (0), 0 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 05:34:01,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2586 states to 2586 states and 8646 transitions. [2022-01-18 05:34:01,704 INFO L78 Accepts]: Start accepts. Automaton has 2586 states and 8646 transitions. Word has length 24 [2022-01-18 05:34:01,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:01,704 INFO L470 AbstractCegarLoop]: Abstraction has 2586 states and 8646 transitions. [2022-01-18 05:34:01,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:34:01,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2586 states and 8646 transitions. [2022-01-18 05:34:01,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:34:01,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:01,708 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] [2022-01-18 05:34:01,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-01-18 05:34:01,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:01,908 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:34:01,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:01,909 INFO L85 PathProgramCache]: Analyzing trace with hash 957867473, now seen corresponding path program 137 times [2022-01-18 05:34:01,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:01,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687747277] [2022-01-18 05:34:01,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:01,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:02,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:02,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:02,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687747277] [2022-01-18 05:34:02,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687747277] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:02,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262240496] [2022-01-18 05:34:02,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:34:02,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:02,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:02,143 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:34:02,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-01-18 05:34:02,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 05:34:02,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:34:02,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:34:02,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:02,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:02,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:02,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:02,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:34:02,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 35 [2022-01-18 05:34:02,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:02,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:03,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:03,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:03,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:03,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:03,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2022-01-18 05:34:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:03,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262240496] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:03,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:03,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-01-18 05:34:03,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350605946] [2022-01-18 05:34:03,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:03,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 05:34:03,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:03,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 05:34:03,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:34:03,195 INFO L87 Difference]: Start difference. First operand 2586 states and 8646 transitions. Second operand has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:34:04,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:04,058 INFO L93 Difference]: Finished difference Result 2691 states and 8950 transitions. [2022-01-18 05:34:04,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 05:34:04,058 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:34:04,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:04,063 INFO L225 Difference]: With dead ends: 2691 [2022-01-18 05:34:04,063 INFO L226 Difference]: Without dead ends: 2684 [2022-01-18 05:34:04,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=251, Invalid=2005, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 05:34:04,063 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 64 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 415 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:04,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 110 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 649 Invalid, 0 Unknown, 415 Unchecked, 0.2s Time] [2022-01-18 05:34:04,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2684 states. [2022-01-18 05:34:04,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2684 to 2587. [2022-01-18 05:34:04,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2587 states, 2586 states have (on average 3.3437741686001545) internal successors, (8647), 2586 states have internal predecessors, (8647), 0 states have call successors, (0), 0 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 05:34:04,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2587 states to 2587 states and 8647 transitions. [2022-01-18 05:34:04,104 INFO L78 Accepts]: Start accepts. Automaton has 2587 states and 8647 transitions. Word has length 24 [2022-01-18 05:34:04,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:04,104 INFO L470 AbstractCegarLoop]: Abstraction has 2587 states and 8647 transitions. [2022-01-18 05:34:04,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:34:04,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2587 states and 8647 transitions. [2022-01-18 05:34:04,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:34:04,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:04,107 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] [2022-01-18 05:34:04,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-01-18 05:34:04,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-01-18 05:34:04,308 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:34:04,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:04,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1861458294, now seen corresponding path program 22 times [2022-01-18 05:34:04,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:04,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390975648] [2022-01-18 05:34:04,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:04,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:04,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:04,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390975648] [2022-01-18 05:34:04,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390975648] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:04,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167813086] [2022-01-18 05:34:04,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:34:04,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:04,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:04,533 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:34:04,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-01-18 05:34:04,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:34:04,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:34:04,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:34:04,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:04,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:04,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:04,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:04,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:04,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2022-01-18 05:34:04,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:04,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:05,034 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:34:05,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:34:05,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:05,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:05,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:05,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:05,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:34:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:05,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167813086] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:05,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:05,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:34:05,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561450838] [2022-01-18 05:34:05,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:05,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:34:05,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:05,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:34:05,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:34:05,098 INFO L87 Difference]: Start difference. First operand 2587 states and 8647 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:06,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:06,083 INFO L93 Difference]: Finished difference Result 2853 states and 9514 transitions. [2022-01-18 05:34:06,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 05:34:06,083 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:34:06,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:06,089 INFO L225 Difference]: With dead ends: 2853 [2022-01-18 05:34:06,089 INFO L226 Difference]: Without dead ends: 2845 [2022-01-18 05:34:06,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=1544, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 05:34:06,089 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 70 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:06,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 78 Invalid, 1614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1476 Invalid, 0 Unknown, 117 Unchecked, 0.5s Time] [2022-01-18 05:34:06,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2845 states. [2022-01-18 05:34:06,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2845 to 2579. [2022-01-18 05:34:06,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2579 states, 2578 states have (on average 3.342901474010861) internal successors, (8618), 2578 states have internal predecessors, (8618), 0 states have call successors, (0), 0 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 05:34:06,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2579 states to 2579 states and 8618 transitions. [2022-01-18 05:34:06,122 INFO L78 Accepts]: Start accepts. Automaton has 2579 states and 8618 transitions. Word has length 24 [2022-01-18 05:34:06,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:06,122 INFO L470 AbstractCegarLoop]: Abstraction has 2579 states and 8618 transitions. [2022-01-18 05:34:06,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:06,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2579 states and 8618 transitions. [2022-01-18 05:34:06,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:34:06,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:06,125 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] [2022-01-18 05:34:06,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2022-01-18 05:34:06,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-01-18 05:34:06,326 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:34:06,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:06,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1245375153, now seen corresponding path program 138 times [2022-01-18 05:34:06,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:06,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950581084] [2022-01-18 05:34:06,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:06,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:06,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:06,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950581084] [2022-01-18 05:34:06,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950581084] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:06,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287139005] [2022-01-18 05:34:06,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:34:06,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:06,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:06,570 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:34:06,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-01-18 05:34:06,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 05:34:06,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:34:06,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:34:06,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:06,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:06,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:34:06,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2022-01-18 05:34:07,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:07,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:07,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:07,423 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:34:07,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 55 [2022-01-18 05:34:07,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:07,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287139005] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:07,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:07,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-18 05:34:07,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098683992] [2022-01-18 05:34:07,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:07,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:34:07,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:07,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:34:07,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:34:07,520 INFO L87 Difference]: Start difference. First operand 2579 states and 8618 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:09,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:09,122 INFO L93 Difference]: Finished difference Result 2959 states and 9749 transitions. [2022-01-18 05:34:09,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 05:34:09,122 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:34:09,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:09,127 INFO L225 Difference]: With dead ends: 2959 [2022-01-18 05:34:09,127 INFO L226 Difference]: Without dead ends: 2948 [2022-01-18 05:34:09,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=294, Invalid=2058, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 05:34:09,128 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 136 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 2008 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 2650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 598 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:09,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 139 Invalid, 2650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2008 Invalid, 0 Unknown, 598 Unchecked, 0.8s Time] [2022-01-18 05:34:09,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2948 states. [2022-01-18 05:34:09,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2948 to 2588. [2022-01-18 05:34:09,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2588 states, 2587 states have (on average 3.342481638964051) internal successors, (8647), 2587 states have internal predecessors, (8647), 0 states have call successors, (0), 0 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 05:34:09,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2588 states to 2588 states and 8647 transitions. [2022-01-18 05:34:09,171 INFO L78 Accepts]: Start accepts. Automaton has 2588 states and 8647 transitions. Word has length 24 [2022-01-18 05:34:09,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:09,172 INFO L470 AbstractCegarLoop]: Abstraction has 2588 states and 8647 transitions. [2022-01-18 05:34:09,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:09,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2588 states and 8647 transitions. [2022-01-18 05:34:09,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:34:09,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:09,175 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] [2022-01-18 05:34:09,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2022-01-18 05:34:09,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:09,375 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:34:09,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:09,376 INFO L85 PathProgramCache]: Analyzing trace with hash 436461757, now seen corresponding path program 139 times [2022-01-18 05:34:09,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:09,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802904663] [2022-01-18 05:34:09,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:09,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:09,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:09,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802904663] [2022-01-18 05:34:09,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802904663] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:09,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139983213] [2022-01-18 05:34:09,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:34:09,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:09,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:09,620 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:34:09,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-01-18 05:34:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:09,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:34:09,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:09,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:09,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:09,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:09,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:09,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2022-01-18 05:34:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:09,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:10,132 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:34:10,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:34:10,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:10,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:10,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:10,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:10,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:34:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:10,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139983213] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:10,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:10,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:34:10,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749970587] [2022-01-18 05:34:10,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:10,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:34:10,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:10,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:34:10,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:34:10,195 INFO L87 Difference]: Start difference. First operand 2588 states and 8647 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:11,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:11,155 INFO L93 Difference]: Finished difference Result 2858 states and 9526 transitions. [2022-01-18 05:34:11,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 05:34:11,156 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:34:11,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:11,160 INFO L225 Difference]: With dead ends: 2858 [2022-01-18 05:34:11,160 INFO L226 Difference]: Without dead ends: 2850 [2022-01-18 05:34:11,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=174, Invalid=1466, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 05:34:11,160 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 90 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:11,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 78 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1461 Invalid, 0 Unknown, 81 Unchecked, 0.5s Time] [2022-01-18 05:34:11,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2022-01-18 05:34:11,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 2587. [2022-01-18 05:34:11,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2587 states, 2586 states have (on average 3.3445475638051043) internal successors, (8649), 2586 states have internal predecessors, (8649), 0 states have call successors, (0), 0 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 05:34:11,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2587 states to 2587 states and 8649 transitions. [2022-01-18 05:34:11,191 INFO L78 Accepts]: Start accepts. Automaton has 2587 states and 8649 transitions. Word has length 24 [2022-01-18 05:34:11,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:11,191 INFO L470 AbstractCegarLoop]: Abstraction has 2587 states and 8649 transitions. [2022-01-18 05:34:11,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:11,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2587 states and 8649 transitions. [2022-01-18 05:34:11,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:34:11,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:11,194 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] [2022-01-18 05:34:11,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-01-18 05:34:11,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:11,395 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:34:11,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:11,395 INFO L85 PathProgramCache]: Analyzing trace with hash -836471951, now seen corresponding path program 140 times [2022-01-18 05:34:11,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:11,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495989663] [2022-01-18 05:34:11,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:11,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:11,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:11,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:11,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:11,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495989663] [2022-01-18 05:34:11,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495989663] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:11,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161555766] [2022-01-18 05:34:11,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:34:11,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:11,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:11,627 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:34:11,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-01-18 05:34:11,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:34:11,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:34:11,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:34:11,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:11,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:11,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:34:11,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-01-18 05:34:12,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:12,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:12,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:12,481 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:34:12,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 55 [2022-01-18 05:34:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:12,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161555766] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:12,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:12,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-18 05:34:12,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408524143] [2022-01-18 05:34:12,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:12,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:34:12,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:12,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:34:12,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:34:12,578 INFO L87 Difference]: Start difference. First operand 2587 states and 8649 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:14,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:14,571 INFO L93 Difference]: Finished difference Result 2909 states and 9613 transitions. [2022-01-18 05:34:14,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 05:34:14,572 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:34:14,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:14,576 INFO L225 Difference]: With dead ends: 2909 [2022-01-18 05:34:14,577 INFO L226 Difference]: Without dead ends: 2879 [2022-01-18 05:34:14,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=360, Invalid=2946, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 05:34:14,577 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 125 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 2143 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 497 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:14,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 155 Invalid, 2700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2143 Invalid, 0 Unknown, 497 Unchecked, 0.9s Time] [2022-01-18 05:34:14,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2022-01-18 05:34:14,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2584. [2022-01-18 05:34:14,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2584 states, 2583 states have (on average 3.3441734417344176) internal successors, (8638), 2583 states have internal predecessors, (8638), 0 states have call successors, (0), 0 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 05:34:14,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2584 states to 2584 states and 8638 transitions. [2022-01-18 05:34:14,608 INFO L78 Accepts]: Start accepts. Automaton has 2584 states and 8638 transitions. Word has length 24 [2022-01-18 05:34:14,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:14,608 INFO L470 AbstractCegarLoop]: Abstraction has 2584 states and 8638 transitions. [2022-01-18 05:34:14,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:14,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2584 states and 8638 transitions. [2022-01-18 05:34:14,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:34:14,612 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:14,612 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] [2022-01-18 05:34:14,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2022-01-18 05:34:14,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2022-01-18 05:34:14,812 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:34:14,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:14,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1085292758, now seen corresponding path program 23 times [2022-01-18 05:34:14,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:14,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44000547] [2022-01-18 05:34:14,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:14,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:15,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:15,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44000547] [2022-01-18 05:34:15,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44000547] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:15,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939040497] [2022-01-18 05:34:15,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:34:15,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:15,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:15,062 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:34:15,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-01-18 05:34:15,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:34:15,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:34:15,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:34:15,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:15,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:15,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:15,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:15,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:15,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:34:15,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:15,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:15,601 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:34:15,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:34:15,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:15,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:15,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:15,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:15,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:34:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:15,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939040497] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:15,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:15,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:34:15,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809191531] [2022-01-18 05:34:15,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:15,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:34:15,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:15,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:34:15,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:34:15,652 INFO L87 Difference]: Start difference. First operand 2584 states and 8638 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:16,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:16,992 INFO L93 Difference]: Finished difference Result 2900 states and 9639 transitions. [2022-01-18 05:34:16,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 05:34:16,992 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:34:16,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:16,997 INFO L225 Difference]: With dead ends: 2900 [2022-01-18 05:34:16,997 INFO L226 Difference]: Without dead ends: 2892 [2022-01-18 05:34:16,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=210, Invalid=1952, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 05:34:16,997 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 92 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 1788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:16,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 169 Invalid, 1788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1459 Invalid, 0 Unknown, 288 Unchecked, 0.6s Time] [2022-01-18 05:34:16,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2022-01-18 05:34:17,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 2594. [2022-01-18 05:34:17,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2593 states have (on average 3.34631700732742) internal successors, (8677), 2593 states have internal predecessors, (8677), 0 states have call successors, (0), 0 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 05:34:17,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 8677 transitions. [2022-01-18 05:34:17,028 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 8677 transitions. Word has length 24 [2022-01-18 05:34:17,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:17,029 INFO L470 AbstractCegarLoop]: Abstraction has 2594 states and 8677 transitions. [2022-01-18 05:34:17,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:17,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 8677 transitions. [2022-01-18 05:34:17,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:34:17,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:17,032 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] [2022-01-18 05:34:17,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2022-01-18 05:34:17,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2022-01-18 05:34:17,232 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:34:17,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:17,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1238024875, now seen corresponding path program 141 times [2022-01-18 05:34:17,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:17,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487555579] [2022-01-18 05:34:17,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:17,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:17,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:17,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:17,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487555579] [2022-01-18 05:34:17,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487555579] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:17,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715997738] [2022-01-18 05:34:17,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:34:17,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:17,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:17,470 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:34:17,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-01-18 05:34:17,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 05:34:17,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:34:17,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:34:17,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:17,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:17,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:17,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:34:17,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 56 [2022-01-18 05:34:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:18,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:18,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:18,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:18,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:18,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:18,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 9 [2022-01-18 05:34:18,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:18,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715997738] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:18,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:18,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-01-18 05:34:18,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385806612] [2022-01-18 05:34:18,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:18,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:34:18,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:18,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:34:18,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:34:18,472 INFO L87 Difference]: Start difference. First operand 2594 states and 8677 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:22,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:22,082 INFO L93 Difference]: Finished difference Result 3381 states and 11015 transitions. [2022-01-18 05:34:22,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 05:34:22,082 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:34:22,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:22,088 INFO L225 Difference]: With dead ends: 3381 [2022-01-18 05:34:22,088 INFO L226 Difference]: Without dead ends: 3357 [2022-01-18 05:34:22,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=766, Invalid=6890, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 05:34:22,089 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 351 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 2044 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 2998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 818 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:22,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 115 Invalid, 2998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2044 Invalid, 0 Unknown, 818 Unchecked, 0.9s Time] [2022-01-18 05:34:22,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2022-01-18 05:34:22,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 2550. [2022-01-18 05:34:22,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.3428795606120048) internal successors, (8521), 2549 states have internal predecessors, (8521), 0 states have call successors, (0), 0 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 05:34:22,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8521 transitions. [2022-01-18 05:34:22,125 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8521 transitions. Word has length 24 [2022-01-18 05:34:22,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:22,125 INFO L470 AbstractCegarLoop]: Abstraction has 2550 states and 8521 transitions. [2022-01-18 05:34:22,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:22,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8521 transitions. [2022-01-18 05:34:22,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:34:22,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:22,128 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] [2022-01-18 05:34:22,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-01-18 05:34:22,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2022-01-18 05:34:22,329 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:34:22,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:22,329 INFO L85 PathProgramCache]: Analyzing trace with hash -525329485, now seen corresponding path program 142 times [2022-01-18 05:34:22,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:22,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326257083] [2022-01-18 05:34:22,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:22,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:22,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:22,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:22,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326257083] [2022-01-18 05:34:22,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326257083] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:22,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88722402] [2022-01-18 05:34:22,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:34:22,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:22,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:22,579 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:34:22,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-01-18 05:34:22,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:34:22,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:34:22,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:34:22,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:22,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:22,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:22,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:22,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:22,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2022-01-18 05:34:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:22,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:23,091 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:34:23,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:34:23,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:23,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:23,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:23,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:23,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:34:23,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:23,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88722402] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:23,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:23,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:34:23,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567813075] [2022-01-18 05:34:23,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:23,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:34:23,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:23,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:34:23,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:34:23,155 INFO L87 Difference]: Start difference. First operand 2550 states and 8521 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:34:24,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:24,591 INFO L93 Difference]: Finished difference Result 2906 states and 9658 transitions. [2022-01-18 05:34:24,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 05:34:24,592 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:34:24,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:24,597 INFO L225 Difference]: With dead ends: 2906 [2022-01-18 05:34:24,597 INFO L226 Difference]: Without dead ends: 2887 [2022-01-18 05:34:24,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=312, Invalid=2550, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 05:34:24,597 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 153 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:24,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 88 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1369 Invalid, 0 Unknown, 230 Unchecked, 0.5s Time] [2022-01-18 05:34:24,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2022-01-18 05:34:24,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 2563. [2022-01-18 05:34:24,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 3.3454332552693207) internal successors, (8571), 2562 states have internal predecessors, (8571), 0 states have call successors, (0), 0 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 05:34:24,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 8571 transitions. [2022-01-18 05:34:24,630 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 8571 transitions. Word has length 24 [2022-01-18 05:34:24,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:24,630 INFO L470 AbstractCegarLoop]: Abstraction has 2563 states and 8571 transitions. [2022-01-18 05:34:24,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:34:24,631 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 8571 transitions. [2022-01-18 05:34:24,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:34:24,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:24,634 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] [2022-01-18 05:34:24,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-01-18 05:34:24,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:24,834 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:34:24,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:24,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1646928077, now seen corresponding path program 143 times [2022-01-18 05:34:24,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:24,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122741854] [2022-01-18 05:34:24,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:24,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:24,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:25,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:25,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122741854] [2022-01-18 05:34:25,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122741854] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:25,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154400195] [2022-01-18 05:34:25,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:34:25,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:25,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:25,088 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:34:25,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-01-18 05:34:25,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 05:34:25,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:34:25,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 05:34:25,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:25,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:25,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:25,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:25,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:25,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-01-18 05:34:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:25,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:25,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:25,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:25,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:34:25,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2022-01-18 05:34:25,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:25,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:25,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:25,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:25,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:34:25,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:25,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154400195] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:25,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:25,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-18 05:34:25,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608587745] [2022-01-18 05:34:25,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:25,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:34:25,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:25,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:34:25,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:34:25,725 INFO L87 Difference]: Start difference. First operand 2563 states and 8571 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:34:32,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:32,191 INFO L93 Difference]: Finished difference Result 3604 states and 11373 transitions. [2022-01-18 05:34:32,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-18 05:34:32,191 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:34:32,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:32,197 INFO L225 Difference]: With dead ends: 3604 [2022-01-18 05:34:32,197 INFO L226 Difference]: Without dead ends: 3544 [2022-01-18 05:34:32,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4346 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1240, Invalid=12332, Unknown=0, NotChecked=0, Total=13572 [2022-01-18 05:34:32,198 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 467 mSDsluCounter, 3346 mSDsCounter, 0 mSdLazyCounter, 6540 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 6728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 6540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:32,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 522 Invalid, 6728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 6540 Invalid, 0 Unknown, 32 Unchecked, 2.7s Time] [2022-01-18 05:34:32,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3544 states. [2022-01-18 05:34:32,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3544 to 2525. [2022-01-18 05:34:32,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2525 states, 2524 states have (on average 3.340729001584786) internal successors, (8432), 2524 states have internal predecessors, (8432), 0 states have call successors, (0), 0 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 05:34:32,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2525 states to 2525 states and 8432 transitions. [2022-01-18 05:34:32,236 INFO L78 Accepts]: Start accepts. Automaton has 2525 states and 8432 transitions. Word has length 24 [2022-01-18 05:34:32,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:32,236 INFO L470 AbstractCegarLoop]: Abstraction has 2525 states and 8432 transitions. [2022-01-18 05:34:32,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:34:32,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2525 states and 8432 transitions. [2022-01-18 05:34:32,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:34:32,239 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:32,239 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] [2022-01-18 05:34:32,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2022-01-18 05:34:32,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable231 [2022-01-18 05:34:32,440 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:34:32,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:32,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1367037485, now seen corresponding path program 144 times [2022-01-18 05:34:32,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:32,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080514840] [2022-01-18 05:34:32,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:32,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:32,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:32,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:32,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080514840] [2022-01-18 05:34:32,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080514840] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:32,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623692905] [2022-01-18 05:34:32,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:34:32,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:32,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:32,653 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:34:32,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-01-18 05:34:32,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:34:32,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:34:32,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:34:32,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:32,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:32,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:32,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:32,894 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:34:32,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 05:34:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:33,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:33,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:33,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:33,616 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:34:33,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 57 [2022-01-18 05:34:33,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:33,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623692905] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:33,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:33,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-18 05:34:33,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56306508] [2022-01-18 05:34:33,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:33,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:34:33,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:33,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:34:33,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:34:33,690 INFO L87 Difference]: Start difference. First operand 2525 states and 8432 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:34:35,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:35,693 INFO L93 Difference]: Finished difference Result 3768 states and 12835 transitions. [2022-01-18 05:34:35,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 05:34:35,693 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:34:35,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:35,701 INFO L225 Difference]: With dead ends: 3768 [2022-01-18 05:34:35,701 INFO L226 Difference]: Without dead ends: 3748 [2022-01-18 05:34:35,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=436, Invalid=3724, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 05:34:35,701 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 153 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1245 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:35,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 203 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1634 Invalid, 0 Unknown, 1245 Unchecked, 0.7s Time] [2022-01-18 05:34:35,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2022-01-18 05:34:35,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 2537. [2022-01-18 05:34:35,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 2536 states have (on average 3.345031545741325) internal successors, (8483), 2536 states have internal predecessors, (8483), 0 states have call successors, (0), 0 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 05:34:35,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 8483 transitions. [2022-01-18 05:34:35,740 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 8483 transitions. Word has length 24 [2022-01-18 05:34:35,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:35,741 INFO L470 AbstractCegarLoop]: Abstraction has 2537 states and 8483 transitions. [2022-01-18 05:34:35,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:34:35,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 8483 transitions. [2022-01-18 05:34:35,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:34:35,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:35,744 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] [2022-01-18 05:34:35,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Forceful destruction successful, exit code 0 [2022-01-18 05:34:35,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-01-18 05:34:35,959 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:34:35,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:35,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1427388839, now seen corresponding path program 145 times [2022-01-18 05:34:35,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:35,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764318605] [2022-01-18 05:34:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:35,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:36,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:36,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764318605] [2022-01-18 05:34:36,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764318605] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:36,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915371824] [2022-01-18 05:34:36,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:34:36,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:36,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:36,184 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:34:36,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-01-18 05:34:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:36,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:34:36,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:36,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:36,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:36,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:36,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:36,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:34:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:36,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:36,695 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:34:36,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:34:36,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:36,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:36,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:36,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:36,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:34:36,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:36,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915371824] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:36,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:36,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:34:36,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442681567] [2022-01-18 05:34:36,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:36,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:34:36,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:36,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:34:36,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:34:36,758 INFO L87 Difference]: Start difference. First operand 2537 states and 8483 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 05:34:37,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:37,582 INFO L93 Difference]: Finished difference Result 2868 states and 9604 transitions. [2022-01-18 05:34:37,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:34:37,582 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:34:37,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:37,588 INFO L225 Difference]: With dead ends: 2868 [2022-01-18 05:34:37,588 INFO L226 Difference]: Without dead ends: 2864 [2022-01-18 05:34:37,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 05:34:37,588 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 67 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:37,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 99 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1058 Invalid, 0 Unknown, 218 Unchecked, 0.4s Time] [2022-01-18 05:34:37,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2022-01-18 05:34:37,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 2570. [2022-01-18 05:34:37,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2570 states, 2569 states have (on average 3.3588945114830673) internal successors, (8629), 2569 states have internal predecessors, (8629), 0 states have call successors, (0), 0 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 05:34:37,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 8629 transitions. [2022-01-18 05:34:37,620 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 8629 transitions. Word has length 24 [2022-01-18 05:34:37,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:37,621 INFO L470 AbstractCegarLoop]: Abstraction has 2570 states and 8629 transitions. [2022-01-18 05:34:37,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 05:34:37,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 8629 transitions. [2022-01-18 05:34:37,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:34:37,624 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:37,624 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] [2022-01-18 05:34:37,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Forceful destruction successful, exit code 0 [2022-01-18 05:34:37,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2022-01-18 05:34:37,824 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:34:37,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:37,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1456017990, now seen corresponding path program 24 times [2022-01-18 05:34:37,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:37,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900893450] [2022-01-18 05:34:37,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:37,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:38,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:38,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900893450] [2022-01-18 05:34:38,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900893450] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:38,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994451286] [2022-01-18 05:34:38,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:34:38,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:38,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:38,035 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:34:38,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-01-18 05:34:38,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:34:38,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:34:38,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:34:38,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:38,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:38,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:38,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:38,275 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:34:38,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 05:34:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:38,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:38,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:38,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:38,914 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:34:38,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 57 [2022-01-18 05:34:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:39,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994451286] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:39,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:39,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-18 05:34:39,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79925279] [2022-01-18 05:34:39,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:39,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:34:39,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:39,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:34:39,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:34:39,056 INFO L87 Difference]: Start difference. First operand 2570 states and 8629 transitions. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:39,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:39,825 INFO L93 Difference]: Finished difference Result 2899 states and 9820 transitions. [2022-01-18 05:34:39,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 05:34:39,825 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:34:39,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:39,830 INFO L225 Difference]: With dead ends: 2899 [2022-01-18 05:34:39,830 INFO L226 Difference]: Without dead ends: 2893 [2022-01-18 05:34:39,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=220, Invalid=1760, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 05:34:39,831 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:39,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 87 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 582 Invalid, 0 Unknown, 310 Unchecked, 0.2s Time] [2022-01-18 05:34:39,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2022-01-18 05:34:39,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 2582. [2022-01-18 05:34:39,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2582 states, 2581 states have (on average 3.3607129019759783) internal successors, (8674), 2581 states have internal predecessors, (8674), 0 states have call successors, (0), 0 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 05:34:39,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2582 states to 2582 states and 8674 transitions. [2022-01-18 05:34:39,863 INFO L78 Accepts]: Start accepts. Automaton has 2582 states and 8674 transitions. Word has length 24 [2022-01-18 05:34:39,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:39,863 INFO L470 AbstractCegarLoop]: Abstraction has 2582 states and 8674 transitions. [2022-01-18 05:34:39,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:39,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2582 states and 8674 transitions. [2022-01-18 05:34:39,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:34:39,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:39,866 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] [2022-01-18 05:34:39,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2022-01-18 05:34:40,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-01-18 05:34:40,067 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:34:40,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:40,067 INFO L85 PathProgramCache]: Analyzing trace with hash -380065624, now seen corresponding path program 21 times [2022-01-18 05:34:40,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:40,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132957615] [2022-01-18 05:34:40,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:40,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:40,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:40,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:40,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132957615] [2022-01-18 05:34:40,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132957615] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:40,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879752135] [2022-01-18 05:34:40,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:34:40,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:40,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:40,289 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:34:40,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-01-18 05:34:40,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:34:40,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:34:40,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:34:40,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:40,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:40,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:40,526 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:34:40,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 61 [2022-01-18 05:34:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:40,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:41,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:41,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:41,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:41,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:41,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2022-01-18 05:34:41,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:41,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879752135] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:41,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:41,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-01-18 05:34:41,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755684816] [2022-01-18 05:34:41,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:41,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:34:41,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:41,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:34:41,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:34:41,210 INFO L87 Difference]: Start difference. First operand 2582 states and 8674 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:44,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:44,587 INFO L93 Difference]: Finished difference Result 3767 states and 12249 transitions. [2022-01-18 05:34:44,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 05:34:44,587 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:34:44,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:44,593 INFO L225 Difference]: With dead ends: 3767 [2022-01-18 05:34:44,593 INFO L226 Difference]: Without dead ends: 3741 [2022-01-18 05:34:44,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=604, Invalid=4798, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 05:34:44,593 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 319 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 3445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1004 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:44,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 177 Invalid, 3445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2337 Invalid, 0 Unknown, 1004 Unchecked, 1.0s Time] [2022-01-18 05:34:44,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3741 states. [2022-01-18 05:34:44,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3741 to 2620. [2022-01-18 05:34:44,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2620 states, 2619 states have (on average 3.3680794196258113) internal successors, (8821), 2619 states have internal predecessors, (8821), 0 states have call successors, (0), 0 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 05:34:44,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 8821 transitions. [2022-01-18 05:34:44,628 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 8821 transitions. Word has length 24 [2022-01-18 05:34:44,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:44,629 INFO L470 AbstractCegarLoop]: Abstraction has 2620 states and 8821 transitions. [2022-01-18 05:34:44,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:34:44,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 8821 transitions. [2022-01-18 05:34:44,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:34:44,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:44,632 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] [2022-01-18 05:34:44,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2022-01-18 05:34:44,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:44,832 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:34:44,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:44,832 INFO L85 PathProgramCache]: Analyzing trace with hash 2133522032, now seen corresponding path program 25 times [2022-01-18 05:34:44,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:44,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994498493] [2022-01-18 05:34:44,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:44,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:45,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:45,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994498493] [2022-01-18 05:34:45,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994498493] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:45,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569387942] [2022-01-18 05:34:45,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:34:45,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:45,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:45,042 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:34:45,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-01-18 05:34:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:45,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:34:45,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:45,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:45,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:45,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:45,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:45,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:34:45,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:45,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:45,520 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:34:45,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:34:45,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:45,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:45,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:45,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:45,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:34:45,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:45,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569387942] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:45,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:45,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-01-18 05:34:45,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779931601] [2022-01-18 05:34:45,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:45,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 05:34:45,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:45,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 05:34:45,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:34:45,583 INFO L87 Difference]: Start difference. First operand 2620 states and 8821 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 05:34:46,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:46,837 INFO L93 Difference]: Finished difference Result 3004 states and 10039 transitions. [2022-01-18 05:34:46,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 05:34:46,837 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:34:46,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:46,843 INFO L225 Difference]: With dead ends: 3004 [2022-01-18 05:34:46,843 INFO L226 Difference]: Without dead ends: 2989 [2022-01-18 05:34:46,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=270, Invalid=2180, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 05:34:46,843 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 161 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:46,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 71 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1278 Invalid, 0 Unknown, 388 Unchecked, 0.5s Time] [2022-01-18 05:34:46,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2022-01-18 05:34:46,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 2633. [2022-01-18 05:34:46,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2633 states, 2632 states have (on average 3.367401215805471) internal successors, (8863), 2632 states have internal predecessors, (8863), 0 states have call successors, (0), 0 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 05:34:46,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2633 states to 2633 states and 8863 transitions. [2022-01-18 05:34:46,892 INFO L78 Accepts]: Start accepts. Automaton has 2633 states and 8863 transitions. Word has length 24 [2022-01-18 05:34:46,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:46,892 INFO L470 AbstractCegarLoop]: Abstraction has 2633 states and 8863 transitions. [2022-01-18 05:34:46,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 05:34:46,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2633 states and 8863 transitions. [2022-01-18 05:34:46,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:34:46,896 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:46,896 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:34:46,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-01-18 05:34:47,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:47,097 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:34:47,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:47,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1636225050, now seen corresponding path program 1 times [2022-01-18 05:34:47,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:47,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161599783] [2022-01-18 05:34:47,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:47,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:47,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:47,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161599783] [2022-01-18 05:34:47,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161599783] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:47,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733562903] [2022-01-18 05:34:47,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:47,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:47,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:47,282 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:34:47,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-01-18 05:34:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:47,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:34:47,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:47,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:47,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:47,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:47,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:47,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:34:47,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:47,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:47,835 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:34:47,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:34:47,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:47,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:47,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:47,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:47,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:34:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:47,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733562903] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:47,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:47,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:34:47,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095105516] [2022-01-18 05:34:47,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:47,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:34:47,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:47,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:34:47,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:34:47,897 INFO L87 Difference]: Start difference. First operand 2633 states and 8863 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:34:49,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:49,399 INFO L93 Difference]: Finished difference Result 3345 states and 11076 transitions. [2022-01-18 05:34:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 05:34:49,400 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:34:49,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:49,406 INFO L225 Difference]: With dead ends: 3345 [2022-01-18 05:34:49,406 INFO L226 Difference]: Without dead ends: 3339 [2022-01-18 05:34:49,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=263, Invalid=2493, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 05:34:49,407 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 168 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 1977 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 2668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 657 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:49,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 206 Invalid, 2668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1977 Invalid, 0 Unknown, 657 Unchecked, 0.7s Time] [2022-01-18 05:34:49,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2022-01-18 05:34:49,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 2651. [2022-01-18 05:34:49,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2651 states, 2650 states have (on average 3.361509433962264) internal successors, (8908), 2650 states have internal predecessors, (8908), 0 states have call successors, (0), 0 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 05:34:49,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2651 states to 2651 states and 8908 transitions. [2022-01-18 05:34:49,457 INFO L78 Accepts]: Start accepts. Automaton has 2651 states and 8908 transitions. Word has length 24 [2022-01-18 05:34:49,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:49,457 INFO L470 AbstractCegarLoop]: Abstraction has 2651 states and 8908 transitions. [2022-01-18 05:34:49,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:34:49,457 INFO L276 IsEmpty]: Start isEmpty. Operand 2651 states and 8908 transitions. [2022-01-18 05:34:49,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:34:49,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:49,460 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:34:49,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2022-01-18 05:34:49,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2022-01-18 05:34:49,661 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:34:49,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:49,661 INFO L85 PathProgramCache]: Analyzing trace with hash -517823038, now seen corresponding path program 2 times [2022-01-18 05:34:49,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:49,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881063799] [2022-01-18 05:34:49,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:49,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:49,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:49,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881063799] [2022-01-18 05:34:49,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881063799] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:49,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136411572] [2022-01-18 05:34:49,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:34:49,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:49,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:49,841 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:34:49,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-01-18 05:34:49,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:34:49,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:34:49,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:34:49,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:50,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:50,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:50,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:50,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:50,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 05:34:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:50,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:50,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:50,698 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:34:50,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-01-18 05:34:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:50,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136411572] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:50,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:50,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-01-18 05:34:50,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685446004] [2022-01-18 05:34:50,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:50,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:34:50,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:50,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:34:50,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:34:50,773 INFO L87 Difference]: Start difference. First operand 2651 states and 8908 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:34:52,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:52,318 INFO L93 Difference]: Finished difference Result 3376 states and 11002 transitions. [2022-01-18 05:34:52,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 05:34:52,318 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:34:52,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:52,324 INFO L225 Difference]: With dead ends: 3376 [2022-01-18 05:34:52,324 INFO L226 Difference]: Without dead ends: 3352 [2022-01-18 05:34:52,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=385, Invalid=3521, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 05:34:52,325 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 175 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 2186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 634 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:52,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 332 Invalid, 2186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1501 Invalid, 0 Unknown, 634 Unchecked, 0.6s Time] [2022-01-18 05:34:52,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3352 states. [2022-01-18 05:34:52,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3352 to 2676. [2022-01-18 05:34:52,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2676 states, 2675 states have (on average 3.3517757009345797) internal successors, (8966), 2675 states have internal predecessors, (8966), 0 states have call successors, (0), 0 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 05:34:52,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 8966 transitions. [2022-01-18 05:34:52,363 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 8966 transitions. Word has length 24 [2022-01-18 05:34:52,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:52,363 INFO L470 AbstractCegarLoop]: Abstraction has 2676 states and 8966 transitions. [2022-01-18 05:34:52,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:34:52,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 8966 transitions. [2022-01-18 05:34:52,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:34:52,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:52,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:34:52,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2022-01-18 05:34:52,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2022-01-18 05:34:52,574 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:34:52,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:52,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1782268612, now seen corresponding path program 3 times [2022-01-18 05:34:52,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:52,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448656005] [2022-01-18 05:34:52,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:52,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:52,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:52,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448656005] [2022-01-18 05:34:52,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448656005] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:52,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623552988] [2022-01-18 05:34:52,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:34:52,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:52,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:52,756 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:34:52,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-01-18 05:34:52,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:34:52,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:34:52,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:34:52,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:53,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:53,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:53,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:53,062 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:34:53,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 05:34:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:53,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:53,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:53,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:53,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:34:53,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:34:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:53,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623552988] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:53,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:53,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-01-18 05:34:53,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098857670] [2022-01-18 05:34:53,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:53,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:34:53,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:53,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:34:53,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:34:53,761 INFO L87 Difference]: Start difference. First operand 2676 states and 8966 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:34:56,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:56,241 INFO L93 Difference]: Finished difference Result 4696 states and 15925 transitions. [2022-01-18 05:34:56,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 05:34:56,241 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:34:56,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:56,250 INFO L225 Difference]: With dead ends: 4696 [2022-01-18 05:34:56,250 INFO L226 Difference]: Without dead ends: 4691 [2022-01-18 05:34:56,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1393 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=561, Invalid=4841, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 05:34:56,251 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 222 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 2973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2078 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:56,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 228 Invalid, 2973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 859 Invalid, 0 Unknown, 2078 Unchecked, 0.3s Time] [2022-01-18 05:34:56,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2022-01-18 05:34:56,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 2706. [2022-01-18 05:34:56,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2706 states, 2705 states have (on average 3.343438077634011) internal successors, (9044), 2705 states have internal predecessors, (9044), 0 states have call successors, (0), 0 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 05:34:56,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2706 states to 2706 states and 9044 transitions. [2022-01-18 05:34:56,299 INFO L78 Accepts]: Start accepts. Automaton has 2706 states and 9044 transitions. Word has length 24 [2022-01-18 05:34:56,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:56,299 INFO L470 AbstractCegarLoop]: Abstraction has 2706 states and 9044 transitions. [2022-01-18 05:34:56,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:34:56,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2706 states and 9044 transitions. [2022-01-18 05:34:56,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:34:56,302 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:56,302 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:34:56,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Forceful destruction successful, exit code 0 [2022-01-18 05:34:56,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:56,503 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:34:56,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:56,503 INFO L85 PathProgramCache]: Analyzing trace with hash 857387454, now seen corresponding path program 4 times [2022-01-18 05:34:56,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:56,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934107288] [2022-01-18 05:34:56,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:56,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:56,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:56,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:56,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934107288] [2022-01-18 05:34:56,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934107288] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:56,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372838604] [2022-01-18 05:34:56,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:34:56,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:56,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:56,684 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:34:56,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-01-18 05:34:56,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:34:56,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:34:56,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:34:56,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:56,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:56,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:56,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:56,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:56,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:34:56,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:56,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:57,224 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:34:57,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:34:57,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:57,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:57,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:57,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:57,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:34:57,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:57,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372838604] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:57,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:57,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:34:57,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507343610] [2022-01-18 05:34:57,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:57,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:34:57,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:57,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:34:57,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:34:57,288 INFO L87 Difference]: Start difference. First operand 2706 states and 9044 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:34:58,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:34:58,365 INFO L93 Difference]: Finished difference Result 3335 states and 10880 transitions. [2022-01-18 05:34:58,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 05:34:58,365 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:34:58,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:34:58,371 INFO L225 Difference]: With dead ends: 3335 [2022-01-18 05:34:58,371 INFO L226 Difference]: Without dead ends: 3331 [2022-01-18 05:34:58,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=217, Invalid=2135, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 05:34:58,372 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 126 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 2170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 597 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:34:58,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 258 Invalid, 2170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1552 Invalid, 0 Unknown, 597 Unchecked, 0.5s Time] [2022-01-18 05:34:58,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3331 states. [2022-01-18 05:34:58,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3331 to 2695. [2022-01-18 05:34:58,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2695 states, 2694 states have (on average 3.3496659242761693) internal successors, (9024), 2694 states have internal predecessors, (9024), 0 states have call successors, (0), 0 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 05:34:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2695 states to 2695 states and 9024 transitions. [2022-01-18 05:34:58,410 INFO L78 Accepts]: Start accepts. Automaton has 2695 states and 9024 transitions. Word has length 24 [2022-01-18 05:34:58,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:34:58,410 INFO L470 AbstractCegarLoop]: Abstraction has 2695 states and 9024 transitions. [2022-01-18 05:34:58,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:34:58,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states and 9024 transitions. [2022-01-18 05:34:58,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:34:58,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:34:58,414 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:34:58,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2022-01-18 05:34:58,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:58,614 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:34:58,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:34:58,615 INFO L85 PathProgramCache]: Analyzing trace with hash -735920548, now seen corresponding path program 5 times [2022-01-18 05:34:58,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:34:58,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788196044] [2022-01-18 05:34:58,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:34:58,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:34:58,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:34:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:58,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:34:58,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788196044] [2022-01-18 05:34:58,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788196044] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:34:58,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488630969] [2022-01-18 05:34:58,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:34:58,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:34:58,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:34:58,795 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:34:58,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-01-18 05:34:58,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:34:58,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:34:58,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:34:58,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:34:59,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:59,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:59,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:59,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:59,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:34:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:59,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:34:59,339 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:34:59,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:34:59,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:59,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:34:59,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:59,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:34:59,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:34:59,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:34:59,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488630969] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:34:59,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:34:59,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:34:59,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004139654] [2022-01-18 05:34:59,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:34:59,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:34:59,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:34:59,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:34:59,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:34:59,403 INFO L87 Difference]: Start difference. First operand 2695 states and 9024 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:35:00,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:00,871 INFO L93 Difference]: Finished difference Result 3440 states and 11288 transitions. [2022-01-18 05:35:00,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 05:35:00,871 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:35:00,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:00,877 INFO L225 Difference]: With dead ends: 3440 [2022-01-18 05:35:00,878 INFO L226 Difference]: Without dead ends: 3435 [2022-01-18 05:35:00,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=248, Invalid=2302, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 05:35:00,878 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 192 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 1977 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 2537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 524 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:00,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 209 Invalid, 2537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1977 Invalid, 0 Unknown, 524 Unchecked, 0.7s Time] [2022-01-18 05:35:00,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2022-01-18 05:35:00,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 2700. [2022-01-18 05:35:00,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2700 states, 2699 states have (on average 3.347906632085958) internal successors, (9036), 2699 states have internal predecessors, (9036), 0 states have call successors, (0), 0 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 05:35:00,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2700 states to 2700 states and 9036 transitions. [2022-01-18 05:35:00,916 INFO L78 Accepts]: Start accepts. Automaton has 2700 states and 9036 transitions. Word has length 24 [2022-01-18 05:35:00,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:00,916 INFO L470 AbstractCegarLoop]: Abstraction has 2700 states and 9036 transitions. [2022-01-18 05:35:00,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:35:00,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2700 states and 9036 transitions. [2022-01-18 05:35:00,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:35:00,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:00,920 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:35:00,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2022-01-18 05:35:01,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:01,120 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:35:01,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:01,121 INFO L85 PathProgramCache]: Analyzing trace with hash -922618564, now seen corresponding path program 6 times [2022-01-18 05:35:01,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:01,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636404968] [2022-01-18 05:35:01,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:01,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:01,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:01,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636404968] [2022-01-18 05:35:01,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636404968] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:01,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276669375] [2022-01-18 05:35:01,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:35:01,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:01,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:01,302 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:35:01,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-01-18 05:35:01,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:35:01,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:01,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:35:01,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:01,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:01,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:01,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:01,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:35:01,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 51 [2022-01-18 05:35:01,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:01,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:02,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:02,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:02,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:02,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:02,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2022-01-18 05:35:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:02,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276669375] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:02,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:02,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-01-18 05:35:02,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264972831] [2022-01-18 05:35:02,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:02,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:35:02,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:02,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:35:02,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:35:02,245 INFO L87 Difference]: Start difference. First operand 2700 states and 9036 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:35:06,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:06,158 INFO L93 Difference]: Finished difference Result 4885 states and 16240 transitions. [2022-01-18 05:35:06,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 05:35:06,158 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:35:06,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:06,167 INFO L225 Difference]: With dead ends: 4885 [2022-01-18 05:35:06,167 INFO L226 Difference]: Without dead ends: 4875 [2022-01-18 05:35:06,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 32 SyntacticMatches, 9 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3307 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=948, Invalid=9354, Unknown=0, NotChecked=0, Total=10302 [2022-01-18 05:35:06,168 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 228 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 2170 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 3563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1290 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:06,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 285 Invalid, 3563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2170 Invalid, 0 Unknown, 1290 Unchecked, 0.9s Time] [2022-01-18 05:35:06,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-01-18 05:35:06,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 2715. [2022-01-18 05:35:06,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2715 states, 2714 states have (on average 3.347457627118644) internal successors, (9085), 2714 states have internal predecessors, (9085), 0 states have call successors, (0), 0 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 05:35:06,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2715 states to 2715 states and 9085 transitions. [2022-01-18 05:35:06,217 INFO L78 Accepts]: Start accepts. Automaton has 2715 states and 9085 transitions. Word has length 24 [2022-01-18 05:35:06,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:06,217 INFO L470 AbstractCegarLoop]: Abstraction has 2715 states and 9085 transitions. [2022-01-18 05:35:06,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:35:06,217 INFO L276 IsEmpty]: Start isEmpty. Operand 2715 states and 9085 transitions. [2022-01-18 05:35:06,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:35:06,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:06,220 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:35:06,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-01-18 05:35:06,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:06,421 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:35:06,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:06,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1717037502, now seen corresponding path program 7 times [2022-01-18 05:35:06,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:06,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415467198] [2022-01-18 05:35:06,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:06,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:06,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:06,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:06,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415467198] [2022-01-18 05:35:06,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415467198] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:06,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263448766] [2022-01-18 05:35:06,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:35:06,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:06,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:06,600 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:35:06,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-01-18 05:35:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:06,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:35:06,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:06,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:06,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:06,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:06,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:06,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:35:06,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:06,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:07,109 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:35:07,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:35:07,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:07,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:07,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:07,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:07,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:35:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:07,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263448766] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:07,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:07,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:35:07,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989902400] [2022-01-18 05:35:07,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:07,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:35:07,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:07,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:35:07,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:35:07,176 INFO L87 Difference]: Start difference. First operand 2715 states and 9085 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:35:08,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:08,604 INFO L93 Difference]: Finished difference Result 4179 states and 13864 transitions. [2022-01-18 05:35:08,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 05:35:08,604 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:35:08,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:08,612 INFO L225 Difference]: With dead ends: 4179 [2022-01-18 05:35:08,612 INFO L226 Difference]: Without dead ends: 4173 [2022-01-18 05:35:08,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=319, Invalid=2761, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 05:35:08,613 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 199 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 2141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 497 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:08,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 231 Invalid, 2141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1586 Invalid, 0 Unknown, 497 Unchecked, 0.6s Time] [2022-01-18 05:35:08,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4173 states. [2022-01-18 05:35:08,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4173 to 2710. [2022-01-18 05:35:08,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2710 states, 2709 states have (on average 3.349575489110373) internal successors, (9074), 2709 states have internal predecessors, (9074), 0 states have call successors, (0), 0 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 05:35:08,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2710 states to 2710 states and 9074 transitions. [2022-01-18 05:35:08,660 INFO L78 Accepts]: Start accepts. Automaton has 2710 states and 9074 transitions. Word has length 24 [2022-01-18 05:35:08,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:08,660 INFO L470 AbstractCegarLoop]: Abstraction has 2710 states and 9074 transitions. [2022-01-18 05:35:08,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:35:08,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2710 states and 9074 transitions. [2022-01-18 05:35:08,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:35:08,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:08,663 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:35:08,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-01-18 05:35:08,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2022-01-18 05:35:08,864 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:35:08,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:08,864 INFO L85 PathProgramCache]: Analyzing trace with hash -348066496, now seen corresponding path program 8 times [2022-01-18 05:35:08,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:08,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328150838] [2022-01-18 05:35:08,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:08,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:09,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:09,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328150838] [2022-01-18 05:35:09,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328150838] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:09,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943963586] [2022-01-18 05:35:09,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:35:09,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:09,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:09,054 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:35:09,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-01-18 05:35:09,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:35:09,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:09,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:35:09,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:09,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:09,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:09,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:09,401 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:35:09,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 51 [2022-01-18 05:35:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:09,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:10,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:10,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:10,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:10,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:10,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2022-01-18 05:35:10,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:10,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943963586] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:10,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:10,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-01-18 05:35:10,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916036835] [2022-01-18 05:35:10,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:10,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:35:10,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:10,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:35:10,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:35:10,037 INFO L87 Difference]: Start difference. First operand 2710 states and 9074 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:35:11,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:11,808 INFO L93 Difference]: Finished difference Result 3515 states and 11562 transitions. [2022-01-18 05:35:11,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 05:35:11,808 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:35:11,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:11,814 INFO L225 Difference]: With dead ends: 3515 [2022-01-18 05:35:11,815 INFO L226 Difference]: Without dead ends: 3510 [2022-01-18 05:35:11,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=347, Invalid=3313, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 05:35:11,815 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 226 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 1635 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 3611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1932 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:11,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 274 Invalid, 3611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1635 Invalid, 0 Unknown, 1932 Unchecked, 0.6s Time] [2022-01-18 05:35:11,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3510 states. [2022-01-18 05:35:11,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3510 to 2686. [2022-01-18 05:35:11,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2686 states, 2685 states have (on average 3.3579143389199255) internal successors, (9016), 2685 states have internal predecessors, (9016), 0 states have call successors, (0), 0 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 05:35:11,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2686 states to 2686 states and 9016 transitions. [2022-01-18 05:35:11,853 INFO L78 Accepts]: Start accepts. Automaton has 2686 states and 9016 transitions. Word has length 24 [2022-01-18 05:35:11,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:11,853 INFO L470 AbstractCegarLoop]: Abstraction has 2686 states and 9016 transitions. [2022-01-18 05:35:11,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:35:11,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2686 states and 9016 transitions. [2022-01-18 05:35:11,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:35:11,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:11,856 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:35:11,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Forceful destruction successful, exit code 0 [2022-01-18 05:35:12,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:12,057 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:35:12,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:12,057 INFO L85 PathProgramCache]: Analyzing trace with hash 704223460, now seen corresponding path program 9 times [2022-01-18 05:35:12,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:12,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060752844] [2022-01-18 05:35:12,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:12,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:12,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:12,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060752844] [2022-01-18 05:35:12,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060752844] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:12,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501947271] [2022-01-18 05:35:12,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:35:12,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:12,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:12,251 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:35:12,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-01-18 05:35:12,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:35:12,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:12,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:35:12,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:12,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:12,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:12,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:12,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:35:12,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 05:35:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:12,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:13,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:13,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:13,217 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:35:13,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:35:13,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:13,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501947271] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:13,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:13,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-01-18 05:35:13,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307998275] [2022-01-18 05:35:13,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:13,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:35:13,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:13,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:35:13,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:35:13,369 INFO L87 Difference]: Start difference. First operand 2686 states and 9016 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:35:14,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:14,439 INFO L93 Difference]: Finished difference Result 3703 states and 12695 transitions. [2022-01-18 05:35:14,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 05:35:14,440 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:35:14,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:14,447 INFO L225 Difference]: With dead ends: 3703 [2022-01-18 05:35:14,447 INFO L226 Difference]: Without dead ends: 3701 [2022-01-18 05:35:14,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=335, Invalid=2017, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 05:35:14,447 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 84 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 558 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:14,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 173 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 262 Invalid, 0 Unknown, 558 Unchecked, 0.1s Time] [2022-01-18 05:35:14,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3701 states. [2022-01-18 05:35:14,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3701 to 2691. [2022-01-18 05:35:14,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2691 states, 2690 states have (on average 3.3557620817843867) internal successors, (9027), 2690 states have internal predecessors, (9027), 0 states have call successors, (0), 0 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 05:35:14,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2691 states to 2691 states and 9027 transitions. [2022-01-18 05:35:14,487 INFO L78 Accepts]: Start accepts. Automaton has 2691 states and 9027 transitions. Word has length 24 [2022-01-18 05:35:14,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:14,487 INFO L470 AbstractCegarLoop]: Abstraction has 2691 states and 9027 transitions. [2022-01-18 05:35:14,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:35:14,487 INFO L276 IsEmpty]: Start isEmpty. Operand 2691 states and 9027 transitions. [2022-01-18 05:35:14,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:35:14,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:14,490 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:35:14,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2022-01-18 05:35:14,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-01-18 05:35:14,693 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:35:14,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:14,693 INFO L85 PathProgramCache]: Analyzing trace with hash -560222114, now seen corresponding path program 10 times [2022-01-18 05:35:14,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:14,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325636884] [2022-01-18 05:35:14,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:14,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:14,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:14,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325636884] [2022-01-18 05:35:14,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325636884] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:14,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806087001] [2022-01-18 05:35:14,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:35:14,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:14,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:14,885 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:35:14,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-01-18 05:35:14,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:35:14,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:14,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:35:14,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:15,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:15,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:15,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:15,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:15,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:35:15,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:15,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:15,444 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:35:15,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:35:15,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:15,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:15,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:15,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:15,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:35:15,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:15,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806087001] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:15,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:15,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:35:15,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665412809] [2022-01-18 05:35:15,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:15,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:35:15,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:15,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:35:15,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:35:15,506 INFO L87 Difference]: Start difference. First operand 2691 states and 9027 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:35:16,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:16,778 INFO L93 Difference]: Finished difference Result 3064 states and 10166 transitions. [2022-01-18 05:35:16,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 05:35:16,778 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:35:16,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:16,784 INFO L225 Difference]: With dead ends: 3064 [2022-01-18 05:35:16,784 INFO L226 Difference]: Without dead ends: 3058 [2022-01-18 05:35:16,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=237, Invalid=2213, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 05:35:16,785 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 124 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 1805 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 2117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:16,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 162 Invalid, 2117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1805 Invalid, 0 Unknown, 279 Unchecked, 0.6s Time] [2022-01-18 05:35:16,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3058 states. [2022-01-18 05:35:16,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3058 to 2695. [2022-01-18 05:35:16,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2695 states, 2694 states have (on average 3.35449146250928) internal successors, (9037), 2694 states have internal predecessors, (9037), 0 states have call successors, (0), 0 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 05:35:16,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2695 states to 2695 states and 9037 transitions. [2022-01-18 05:35:16,820 INFO L78 Accepts]: Start accepts. Automaton has 2695 states and 9037 transitions. Word has length 24 [2022-01-18 05:35:16,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:16,820 INFO L470 AbstractCegarLoop]: Abstraction has 2695 states and 9037 transitions. [2022-01-18 05:35:16,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:35:16,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states and 9037 transitions. [2022-01-18 05:35:16,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:35:16,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:16,824 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:35:16,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2022-01-18 05:35:17,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2022-01-18 05:35:17,027 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:35:17,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:17,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1092727899, now seen corresponding path program 1 times [2022-01-18 05:35:17,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:17,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130027400] [2022-01-18 05:35:17,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:17,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:17,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:17,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130027400] [2022-01-18 05:35:17,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130027400] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:17,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613592925] [2022-01-18 05:35:17,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:17,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:17,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:17,218 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:35:17,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-01-18 05:35:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:17,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:35:17,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:17,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:17,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:17,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:17,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:17,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:35:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:17,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:17,780 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:35:17,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:35:17,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:17,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:17,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:17,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:17,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:35:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:17,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613592925] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:17,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:17,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:35:17,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428302799] [2022-01-18 05:35:17,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:17,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:35:17,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:17,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:35:17,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:35:17,842 INFO L87 Difference]: Start difference. First operand 2695 states and 9037 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:35:19,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:19,130 INFO L93 Difference]: Finished difference Result 3168 states and 10462 transitions. [2022-01-18 05:35:19,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 05:35:19,131 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:35:19,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:19,136 INFO L225 Difference]: With dead ends: 3168 [2022-01-18 05:35:19,137 INFO L226 Difference]: Without dead ends: 3162 [2022-01-18 05:35:19,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=252, Invalid=2298, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 05:35:19,137 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 170 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 1700 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 2925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1193 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:19,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 173 Invalid, 2925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1700 Invalid, 0 Unknown, 1193 Unchecked, 0.6s Time] [2022-01-18 05:35:19,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2022-01-18 05:35:19,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 2692. [2022-01-18 05:35:19,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2692 states, 2691 states have (on average 3.3552582683017467) internal successors, (9029), 2691 states have internal predecessors, (9029), 0 states have call successors, (0), 0 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 05:35:19,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 9029 transitions. [2022-01-18 05:35:19,173 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 9029 transitions. Word has length 24 [2022-01-18 05:35:19,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:19,173 INFO L470 AbstractCegarLoop]: Abstraction has 2692 states and 9029 transitions. [2022-01-18 05:35:19,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:35:19,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 9029 transitions. [2022-01-18 05:35:19,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:35:19,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:19,176 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:35:19,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2022-01-18 05:35:19,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2022-01-18 05:35:19,377 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:35:19,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:19,377 INFO L85 PathProgramCache]: Analyzing trace with hash 161966204, now seen corresponding path program 11 times [2022-01-18 05:35:19,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:19,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766089756] [2022-01-18 05:35:19,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:19,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:19,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:19,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766089756] [2022-01-18 05:35:19,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766089756] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:19,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784002817] [2022-01-18 05:35:19,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:35:19,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:19,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:19,585 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:35:19,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-01-18 05:35:19,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:35:19,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:19,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:35:19,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:19,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:19,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:19,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:19,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:19,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:35:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:19,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:20,120 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:35:20,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:35:20,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:20,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:20,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:20,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:20,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:35:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:20,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784002817] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:20,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:20,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:35:20,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82428162] [2022-01-18 05:35:20,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:20,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:35:20,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:20,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:35:20,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:35:20,181 INFO L87 Difference]: Start difference. First operand 2692 states and 9029 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:35:21,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:21,012 INFO L93 Difference]: Finished difference Result 3042 states and 10151 transitions. [2022-01-18 05:35:21,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 05:35:21,012 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:35:21,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:21,018 INFO L225 Difference]: With dead ends: 3042 [2022-01-18 05:35:21,018 INFO L226 Difference]: Without dead ends: 3036 [2022-01-18 05:35:21,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 05:35:21,018 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 92 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 513 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:21,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 159 Invalid, 1863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1320 Invalid, 0 Unknown, 513 Unchecked, 0.5s Time] [2022-01-18 05:35:21,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2022-01-18 05:35:21,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 2695. [2022-01-18 05:35:21,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2695 states, 2694 states have (on average 3.3537490720118783) internal successors, (9035), 2694 states have internal predecessors, (9035), 0 states have call successors, (0), 0 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 05:35:21,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2695 states to 2695 states and 9035 transitions. [2022-01-18 05:35:21,053 INFO L78 Accepts]: Start accepts. Automaton has 2695 states and 9035 transitions. Word has length 24 [2022-01-18 05:35:21,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:21,053 INFO L470 AbstractCegarLoop]: Abstraction has 2695 states and 9035 transitions. [2022-01-18 05:35:21,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:35:21,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states and 9035 transitions. [2022-01-18 05:35:21,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:35:21,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:21,057 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:35:21,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2022-01-18 05:35:21,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:21,257 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:35:21,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:21,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1493345026, now seen corresponding path program 12 times [2022-01-18 05:35:21,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:21,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080978585] [2022-01-18 05:35:21,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:21,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:21,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:21,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080978585] [2022-01-18 05:35:21,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080978585] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:21,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468207631] [2022-01-18 05:35:21,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:35:21,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:21,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:21,466 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:35:21,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-01-18 05:35:21,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:35:21,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:21,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:35:21,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:21,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:21,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:21,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:21,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:35:21,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2022-01-18 05:35:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:21,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:22,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:22,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:22,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:22,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:22,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2022-01-18 05:35:22,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:22,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468207631] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:22,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:22,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-01-18 05:35:22,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200126040] [2022-01-18 05:35:22,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:22,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:35:22,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:22,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:35:22,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:35:22,420 INFO L87 Difference]: Start difference. First operand 2695 states and 9035 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:35:23,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:23,806 INFO L93 Difference]: Finished difference Result 3280 states and 10877 transitions. [2022-01-18 05:35:23,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 05:35:23,806 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:35:23,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:23,812 INFO L225 Difference]: With dead ends: 3280 [2022-01-18 05:35:23,812 INFO L226 Difference]: Without dead ends: 3272 [2022-01-18 05:35:23,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=346, Invalid=3194, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 05:35:23,813 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 148 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 728 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:23,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 193 Invalid, 1685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 910 Invalid, 0 Unknown, 728 Unchecked, 0.4s Time] [2022-01-18 05:35:23,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2022-01-18 05:35:23,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 2700. [2022-01-18 05:35:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2700 states, 2699 states have (on average 3.3519822156354206) internal successors, (9047), 2699 states have internal predecessors, (9047), 0 states have call successors, (0), 0 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 05:35:23,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2700 states to 2700 states and 9047 transitions. [2022-01-18 05:35:23,849 INFO L78 Accepts]: Start accepts. Automaton has 2700 states and 9047 transitions. Word has length 24 [2022-01-18 05:35:23,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:23,849 INFO L470 AbstractCegarLoop]: Abstraction has 2700 states and 9047 transitions. [2022-01-18 05:35:23,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:35:23,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2700 states and 9047 transitions. [2022-01-18 05:35:23,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:35:23,852 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:23,852 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:35:23,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2022-01-18 05:35:24,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:24,067 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:35:24,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:24,068 INFO L85 PathProgramCache]: Analyzing trace with hash -2106276388, now seen corresponding path program 13 times [2022-01-18 05:35:24,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:24,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894975598] [2022-01-18 05:35:24,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:24,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:24,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:24,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:24,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894975598] [2022-01-18 05:35:24,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894975598] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:24,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272661613] [2022-01-18 05:35:24,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:35:24,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:24,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:24,293 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:35:24,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-01-18 05:35:24,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:24,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:35:24,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:24,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:24,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:24,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:24,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:24,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:35:24,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:24,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:24,837 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:35:24,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:35:24,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:24,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:24,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:24,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:24,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:35:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:24,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272661613] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:24,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:24,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:35:24,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746290889] [2022-01-18 05:35:24,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:24,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:35:24,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:24,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:35:24,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:35:24,893 INFO L87 Difference]: Start difference. First operand 2700 states and 9047 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:35:25,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:25,564 INFO L93 Difference]: Finished difference Result 3046 states and 10128 transitions. [2022-01-18 05:35:25,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 05:35:25,564 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:35:25,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:25,569 INFO L225 Difference]: With dead ends: 3046 [2022-01-18 05:35:25,569 INFO L226 Difference]: Without dead ends: 3040 [2022-01-18 05:35:25,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=171, Invalid=1311, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 05:35:25,570 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 86 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 619 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:25,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 173 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 997 Invalid, 0 Unknown, 619 Unchecked, 0.4s Time] [2022-01-18 05:35:25,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3040 states. [2022-01-18 05:35:25,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3040 to 2711. [2022-01-18 05:35:25,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2710 states have (on average 3.347970479704797) internal successors, (9073), 2710 states have internal predecessors, (9073), 0 states have call successors, (0), 0 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 05:35:25,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 9073 transitions. [2022-01-18 05:35:25,605 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 9073 transitions. Word has length 24 [2022-01-18 05:35:25,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:25,605 INFO L470 AbstractCegarLoop]: Abstraction has 2711 states and 9073 transitions. [2022-01-18 05:35:25,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:35:25,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 9073 transitions. [2022-01-18 05:35:25,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:35:25,608 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:25,608 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:35:25,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2022-01-18 05:35:25,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:25,809 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:35:25,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:25,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1245023274, now seen corresponding path program 14 times [2022-01-18 05:35:25,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:25,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097188242] [2022-01-18 05:35:25,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:25,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:26,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:26,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097188242] [2022-01-18 05:35:26,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097188242] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:26,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650603304] [2022-01-18 05:35:26,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:35:26,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:26,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:26,018 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:35:26,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-01-18 05:35:26,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:35:26,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:26,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:35:26,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:26,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:26,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:26,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:26,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:35:26,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 05:35:26,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:26,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:26,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:26,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:26,929 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:35:26,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:35:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:26,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650603304] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:26,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:26,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:35:26,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062608730] [2022-01-18 05:35:26,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:26,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:35:26,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:26,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:35:26,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:35:26,999 INFO L87 Difference]: Start difference. First operand 2711 states and 9073 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 05:35:28,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:28,350 INFO L93 Difference]: Finished difference Result 3799 states and 13030 transitions. [2022-01-18 05:35:28,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 05:35:28,351 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:35:28,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:28,357 INFO L225 Difference]: With dead ends: 3799 [2022-01-18 05:35:28,357 INFO L226 Difference]: Without dead ends: 3794 [2022-01-18 05:35:28,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=410, Invalid=2782, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 05:35:28,358 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 120 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1051 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:28,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 146 Invalid, 1551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 471 Invalid, 0 Unknown, 1051 Unchecked, 0.2s Time] [2022-01-18 05:35:28,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3794 states. [2022-01-18 05:35:28,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3794 to 2716. [2022-01-18 05:35:28,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 3.347329650092081) internal successors, (9088), 2715 states have internal predecessors, (9088), 0 states have call successors, (0), 0 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 05:35:28,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 9088 transitions. [2022-01-18 05:35:28,401 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 9088 transitions. Word has length 24 [2022-01-18 05:35:28,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:28,401 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 9088 transitions. [2022-01-18 05:35:28,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 05:35:28,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 9088 transitions. [2022-01-18 05:35:28,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:35:28,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:28,404 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:35:28,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Forceful destruction successful, exit code 0 [2022-01-18 05:35:28,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:28,605 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:35:28,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:28,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1242489559, now seen corresponding path program 2 times [2022-01-18 05:35:28,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:28,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662155533] [2022-01-18 05:35:28,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:28,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:28,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:28,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662155533] [2022-01-18 05:35:28,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662155533] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:28,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757829400] [2022-01-18 05:35:28,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:35:28,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:28,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:28,834 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:35:28,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-01-18 05:35:28,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:35:28,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:28,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:35:28,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:29,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:29,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:29,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:29,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:35:29,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 05:35:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:29,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:29,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:29,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:29,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:35:29,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:35:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:29,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757829400] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:29,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:29,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:35:29,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054927530] [2022-01-18 05:35:29,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:29,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:35:29,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:29,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:35:29,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:35:29,828 INFO L87 Difference]: Start difference. First operand 2716 states and 9088 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 05:35:30,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:30,736 INFO L93 Difference]: Finished difference Result 3740 states and 12792 transitions. [2022-01-18 05:35:30,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 05:35:30,737 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:35:30,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:30,744 INFO L225 Difference]: With dead ends: 3740 [2022-01-18 05:35:30,744 INFO L226 Difference]: Without dead ends: 3735 [2022-01-18 05:35:30,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=289, Invalid=1781, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:35:30,744 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 805 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:30,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 178 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 462 Invalid, 0 Unknown, 805 Unchecked, 0.2s Time] [2022-01-18 05:35:30,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3735 states. [2022-01-18 05:35:30,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3735 to 2724. [2022-01-18 05:35:30,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2723 states have (on average 3.345207491737055) internal successors, (9109), 2723 states have internal predecessors, (9109), 0 states have call successors, (0), 0 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 05:35:30,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 9109 transitions. [2022-01-18 05:35:30,785 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 9109 transitions. Word has length 24 [2022-01-18 05:35:30,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:30,785 INFO L470 AbstractCegarLoop]: Abstraction has 2724 states and 9109 transitions. [2022-01-18 05:35:30,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 05:35:30,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 9109 transitions. [2022-01-18 05:35:30,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:35:30,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:30,788 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:35:30,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2022-01-18 05:35:30,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:30,989 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:35:30,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:30,989 INFO L85 PathProgramCache]: Analyzing trace with hash 2037251490, now seen corresponding path program 15 times [2022-01-18 05:35:30,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:30,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022137927] [2022-01-18 05:35:30,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:30,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:31,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:31,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022137927] [2022-01-18 05:35:31,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022137927] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:31,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740141154] [2022-01-18 05:35:31,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:35:31,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:31,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:31,211 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:35:31,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-01-18 05:35:31,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:35:31,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:31,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:35:31,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:31,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:31,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:31,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:31,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-01-18 05:35:31,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:31,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:31,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:31,983 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:35:31,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-01-18 05:35:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:32,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740141154] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:32,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:32,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:35:32,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533496084] [2022-01-18 05:35:32,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:32,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:35:32,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:32,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:35:32,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:35:32,071 INFO L87 Difference]: Start difference. First operand 2724 states and 9109 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:35:32,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:32,964 INFO L93 Difference]: Finished difference Result 3059 states and 10170 transitions. [2022-01-18 05:35:32,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 05:35:32,965 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:35:32,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:32,970 INFO L225 Difference]: With dead ends: 3059 [2022-01-18 05:35:32,970 INFO L226 Difference]: Without dead ends: 3057 [2022-01-18 05:35:32,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=215, Invalid=1677, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 05:35:32,971 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:32,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 134 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 953 Invalid, 0 Unknown, 363 Unchecked, 0.4s Time] [2022-01-18 05:35:32,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3057 states. [2022-01-18 05:35:32,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3057 to 2724. [2022-01-18 05:35:33,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2723 states have (on average 3.345207491737055) internal successors, (9109), 2723 states have internal predecessors, (9109), 0 states have call successors, (0), 0 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 05:35:33,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 9109 transitions. [2022-01-18 05:35:33,006 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 9109 transitions. Word has length 24 [2022-01-18 05:35:33,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:33,007 INFO L470 AbstractCegarLoop]: Abstraction has 2724 states and 9109 transitions. [2022-01-18 05:35:33,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:35:33,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 9109 transitions. [2022-01-18 05:35:33,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:35:33,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:33,010 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:35:33,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Forceful destruction successful, exit code 0 [2022-01-18 05:35:33,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:33,211 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:35:33,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:33,211 INFO L85 PathProgramCache]: Analyzing trace with hash 229797027, now seen corresponding path program 3 times [2022-01-18 05:35:33,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:33,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551479269] [2022-01-18 05:35:33,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:33,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:33,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:33,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551479269] [2022-01-18 05:35:33,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551479269] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:33,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999632676] [2022-01-18 05:35:33,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:35:33,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:33,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:33,432 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:35:33,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-01-18 05:35:33,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:35:33,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:33,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:35:33,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:33,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:33,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:33,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:33,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:33,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-01-18 05:35:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:33,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:34,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:34,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:35:34,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-01-18 05:35:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:34,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999632676] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:34,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:34,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:35:34,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13314290] [2022-01-18 05:35:34,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:34,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:35:34,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:34,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:35:34,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:35:34,316 INFO L87 Difference]: Start difference. First operand 2724 states and 9109 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:35:35,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:35,511 INFO L93 Difference]: Finished difference Result 3203 states and 10673 transitions. [2022-01-18 05:35:35,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 05:35:35,512 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:35:35,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:35,518 INFO L225 Difference]: With dead ends: 3203 [2022-01-18 05:35:35,518 INFO L226 Difference]: Without dead ends: 3198 [2022-01-18 05:35:35,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=293, Invalid=2059, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 05:35:35,519 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 139 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 2068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 745 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:35,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 160 Invalid, 2068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1275 Invalid, 0 Unknown, 745 Unchecked, 0.5s Time] [2022-01-18 05:35:35,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2022-01-18 05:35:35,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 2721. [2022-01-18 05:35:35,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2721 states, 2720 states have (on average 3.3459558823529414) internal successors, (9101), 2720 states have internal predecessors, (9101), 0 states have call successors, (0), 0 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 05:35:35,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2721 states to 2721 states and 9101 transitions. [2022-01-18 05:35:35,557 INFO L78 Accepts]: Start accepts. Automaton has 2721 states and 9101 transitions. Word has length 24 [2022-01-18 05:35:35,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:35,557 INFO L470 AbstractCegarLoop]: Abstraction has 2721 states and 9101 transitions. [2022-01-18 05:35:35,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:35:35,557 INFO L276 IsEmpty]: Start isEmpty. Operand 2721 states and 9101 transitions. [2022-01-18 05:35:35,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:35:35,561 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:35,561 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:35:35,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Ended with exit code 0 [2022-01-18 05:35:35,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:35,762 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:35:35,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:35,763 INFO L85 PathProgramCache]: Analyzing trace with hash 290200096, now seen corresponding path program 16 times [2022-01-18 05:35:35,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:35,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6684361] [2022-01-18 05:35:35,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:35,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:35,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:35,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6684361] [2022-01-18 05:35:35,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6684361] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:35,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299245635] [2022-01-18 05:35:35,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:35:35,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:35,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:35,989 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:35:35,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-01-18 05:35:36,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:35:36,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:36,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:35:36,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:36,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:36,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:36,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:36,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:36,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:35:36,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:36,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:36,496 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:35:36,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:35:36,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:36,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:36,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:36,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:36,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:35:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:36,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299245635] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:36,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:36,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:35:36,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770555242] [2022-01-18 05:35:36,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:36,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:35:36,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:36,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:35:36,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:35:36,553 INFO L87 Difference]: Start difference. First operand 2721 states and 9101 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:35:37,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:37,538 INFO L93 Difference]: Finished difference Result 3085 states and 10266 transitions. [2022-01-18 05:35:37,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:35:37,539 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:35:37,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:37,545 INFO L225 Difference]: With dead ends: 3085 [2022-01-18 05:35:37,545 INFO L226 Difference]: Without dead ends: 3079 [2022-01-18 05:35:37,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=224, Invalid=1668, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 05:35:37,545 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 85 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:37,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 151 Invalid, 1538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1267 Invalid, 0 Unknown, 233 Unchecked, 0.5s Time] [2022-01-18 05:35:37,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3079 states. [2022-01-18 05:35:37,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3079 to 2722. [2022-01-18 05:35:37,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2721 states have (on average 3.3454612274898934) internal successors, (9103), 2721 states have internal predecessors, (9103), 0 states have call successors, (0), 0 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 05:35:37,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 9103 transitions. [2022-01-18 05:35:37,582 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 9103 transitions. Word has length 24 [2022-01-18 05:35:37,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:37,582 INFO L470 AbstractCegarLoop]: Abstraction has 2722 states and 9103 transitions. [2022-01-18 05:35:37,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:35:37,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 9103 transitions. [2022-01-18 05:35:37,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:35:37,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:37,585 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:35:37,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Ended with exit code 0 [2022-01-18 05:35:37,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2022-01-18 05:35:37,788 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:35:37,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:37,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1596395592, now seen corresponding path program 17 times [2022-01-18 05:35:37,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:37,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597695792] [2022-01-18 05:35:37,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:37,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:38,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:38,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597695792] [2022-01-18 05:35:38,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597695792] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:38,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920842689] [2022-01-18 05:35:38,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:35:38,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:38,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:38,007 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:35:38,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-01-18 05:35:38,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:35:38,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:38,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:35:38,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:38,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:38,252 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:35:38,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-01-18 05:35:38,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:38,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:38,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:38,794 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:35:38,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-01-18 05:35:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:38,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920842689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:38,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:38,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:35:38,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122256378] [2022-01-18 05:35:38,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:38,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:35:38,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:38,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:35:38,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:35:38,888 INFO L87 Difference]: Start difference. First operand 2722 states and 9103 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:39,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:39,709 INFO L93 Difference]: Finished difference Result 2948 states and 9837 transitions. [2022-01-18 05:35:39,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:35:39,709 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:35:39,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:39,714 INFO L225 Difference]: With dead ends: 2948 [2022-01-18 05:35:39,714 INFO L226 Difference]: Without dead ends: 2942 [2022-01-18 05:35:39,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=1241, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:35:39,715 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 56 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 329 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:39,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 128 Invalid, 1721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1382 Invalid, 0 Unknown, 329 Unchecked, 0.5s Time] [2022-01-18 05:35:39,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2022-01-18 05:35:39,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 2724. [2022-01-18 05:35:39,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2723 states have (on average 3.3444730077120823) internal successors, (9107), 2723 states have internal predecessors, (9107), 0 states have call successors, (0), 0 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 05:35:39,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 9107 transitions. [2022-01-18 05:35:39,748 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 9107 transitions. Word has length 24 [2022-01-18 05:35:39,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:39,749 INFO L470 AbstractCegarLoop]: Abstraction has 2724 states and 9107 transitions. [2022-01-18 05:35:39,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:35:39,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 9107 transitions. [2022-01-18 05:35:39,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:35:39,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:39,752 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:35:39,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Forceful destruction successful, exit code 0 [2022-01-18 05:35:39,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-01-18 05:35:39,953 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:35:39,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:39,953 INFO L85 PathProgramCache]: Analyzing trace with hash -528106916, now seen corresponding path program 18 times [2022-01-18 05:35:39,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:39,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430261833] [2022-01-18 05:35:39,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:39,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:40,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:40,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430261833] [2022-01-18 05:35:40,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430261833] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:40,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073434738] [2022-01-18 05:35:40,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:35:40,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:40,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:40,176 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:35:40,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-01-18 05:35:40,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:35:40,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:40,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 05:35:40,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:40,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:40,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:40,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:40,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:35:40,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 42 [2022-01-18 05:35:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:40,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:41,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:41,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:41,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:41,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:41,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 7 [2022-01-18 05:35:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:41,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073434738] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:41,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:41,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-01-18 05:35:41,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450132432] [2022-01-18 05:35:41,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:41,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:35:41,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:41,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:35:41,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:35:41,454 INFO L87 Difference]: Start difference. First operand 2724 states and 9107 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:35:42,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:42,339 INFO L93 Difference]: Finished difference Result 2971 states and 9838 transitions. [2022-01-18 05:35:42,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 05:35:42,340 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:35:42,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:42,345 INFO L225 Difference]: With dead ends: 2971 [2022-01-18 05:35:42,345 INFO L226 Difference]: Without dead ends: 2965 [2022-01-18 05:35:42,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=185, Invalid=1707, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 05:35:42,346 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 85 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:42,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 128 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1066 Invalid, 0 Unknown, 263 Unchecked, 0.4s Time] [2022-01-18 05:35:42,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2022-01-18 05:35:42,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2725. [2022-01-18 05:35:42,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 3.3443465491923643) internal successors, (9110), 2724 states have internal predecessors, (9110), 0 states have call successors, (0), 0 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 05:35:42,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 9110 transitions. [2022-01-18 05:35:42,380 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 9110 transitions. Word has length 24 [2022-01-18 05:35:42,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:42,380 INFO L470 AbstractCegarLoop]: Abstraction has 2725 states and 9110 transitions. [2022-01-18 05:35:42,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:35:42,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 9110 transitions. [2022-01-18 05:35:42,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:35:42,384 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:42,384 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:35:42,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2022-01-18 05:35:42,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-01-18 05:35:42,585 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:35:42,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:42,585 INFO L85 PathProgramCache]: Analyzing trace with hash 205459606, now seen corresponding path program 19 times [2022-01-18 05:35:42,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:42,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957577373] [2022-01-18 05:35:42,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:42,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:42,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:42,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957577373] [2022-01-18 05:35:42,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957577373] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:42,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351417628] [2022-01-18 05:35:42,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:35:42,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:42,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:42,801 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:35:42,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-01-18 05:35:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:42,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:35:42,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:43,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:43,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:43,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:43,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:43,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-01-18 05:35:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:43,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:43,313 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:35:43,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:35:43,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:43,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:43,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:43,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:43,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:35:43,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:43,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351417628] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:43,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:43,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 26 [2022-01-18 05:35:43,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690698591] [2022-01-18 05:35:43,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:43,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 05:35:43,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:43,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 05:35:43,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:35:43,364 INFO L87 Difference]: Start difference. First operand 2725 states and 9110 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:35:44,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:44,051 INFO L93 Difference]: Finished difference Result 3010 states and 10068 transitions. [2022-01-18 05:35:44,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 05:35:44,052 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:35:44,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:44,070 INFO L225 Difference]: With dead ends: 3010 [2022-01-18 05:35:44,070 INFO L226 Difference]: Without dead ends: 3003 [2022-01-18 05:35:44,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:35:44,070 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 71 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 446 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:44,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 78 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 979 Invalid, 0 Unknown, 446 Unchecked, 0.4s Time] [2022-01-18 05:35:44,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2022-01-18 05:35:44,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 2722. [2022-01-18 05:35:44,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2721 states have (on average 3.3454612274898934) internal successors, (9103), 2721 states have internal predecessors, (9103), 0 states have call successors, (0), 0 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 05:35:44,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 9103 transitions. [2022-01-18 05:35:44,103 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 9103 transitions. Word has length 24 [2022-01-18 05:35:44,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:44,103 INFO L470 AbstractCegarLoop]: Abstraction has 2722 states and 9103 transitions. [2022-01-18 05:35:44,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:35:44,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 9103 transitions. [2022-01-18 05:35:44,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:35:44,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:44,106 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:35:44,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Ended with exit code 0 [2022-01-18 05:35:44,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:44,307 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:35:44,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:44,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1151190437, now seen corresponding path program 1 times [2022-01-18 05:35:44,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:44,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388815442] [2022-01-18 05:35:44,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:44,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:44,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:44,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:44,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388815442] [2022-01-18 05:35:44,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388815442] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:44,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20465388] [2022-01-18 05:35:44,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:44,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:44,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:44,491 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:35:44,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-01-18 05:35:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:44,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:35:44,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:44,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:44,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:44,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:44,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:44,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:35:44,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:44,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:45,018 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:35:45,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:35:45,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:45,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:45,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:45,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:45,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:35:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:45,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20465388] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:45,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:45,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:35:45,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132452762] [2022-01-18 05:35:45,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:45,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:35:45,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:45,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:35:45,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:35:45,076 INFO L87 Difference]: Start difference. First operand 2722 states and 9103 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:35:46,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:46,570 INFO L93 Difference]: Finished difference Result 3685 states and 12161 transitions. [2022-01-18 05:35:46,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 05:35:46,570 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:35:46,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:46,577 INFO L225 Difference]: With dead ends: 3685 [2022-01-18 05:35:46,577 INFO L226 Difference]: Without dead ends: 3677 [2022-01-18 05:35:46,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=281, Invalid=2689, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 05:35:46,578 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 231 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 2719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 867 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:46,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 222 Invalid, 2719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1821 Invalid, 0 Unknown, 867 Unchecked, 0.7s Time] [2022-01-18 05:35:46,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3677 states. [2022-01-18 05:35:46,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3677 to 2742. [2022-01-18 05:35:46,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2742 states, 2741 states have (on average 3.3363735862823787) internal successors, (9145), 2741 states have internal predecessors, (9145), 0 states have call successors, (0), 0 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 05:35:46,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2742 states to 2742 states and 9145 transitions. [2022-01-18 05:35:46,632 INFO L78 Accepts]: Start accepts. Automaton has 2742 states and 9145 transitions. Word has length 24 [2022-01-18 05:35:46,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:46,632 INFO L470 AbstractCegarLoop]: Abstraction has 2742 states and 9145 transitions. [2022-01-18 05:35:46,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:35:46,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2742 states and 9145 transitions. [2022-01-18 05:35:46,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:35:46,635 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:46,635 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:35:46,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2022-01-18 05:35:46,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2022-01-18 05:35:46,836 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:35:46,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:46,836 INFO L85 PathProgramCache]: Analyzing trace with hash -274716803, now seen corresponding path program 2 times [2022-01-18 05:35:46,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:46,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982160097] [2022-01-18 05:35:46,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:46,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:47,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:47,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982160097] [2022-01-18 05:35:47,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982160097] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:47,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53841642] [2022-01-18 05:35:47,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:35:47,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:47,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:47,018 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:35:47,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-01-18 05:35:47,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:35:47,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:47,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:35:47,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:47,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:47,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:47,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:47,357 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:35:47,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2022-01-18 05:35:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:47,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:47,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:47,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:47,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:47,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:47,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2022-01-18 05:35:47,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:47,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53841642] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:47,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:47,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-01-18 05:35:47,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186822553] [2022-01-18 05:35:47,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:47,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:35:47,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:47,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:35:47,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:35:47,980 INFO L87 Difference]: Start difference. First operand 2742 states and 9145 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:35:50,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:50,006 INFO L93 Difference]: Finished difference Result 3536 states and 11657 transitions. [2022-01-18 05:35:50,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 05:35:50,007 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:35:50,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:50,014 INFO L225 Difference]: With dead ends: 3536 [2022-01-18 05:35:50,014 INFO L226 Difference]: Without dead ends: 3530 [2022-01-18 05:35:50,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=436, Invalid=3986, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 05:35:50,014 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 165 mSDsluCounter, 1195 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 2721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1214 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:50,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 228 Invalid, 2721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1453 Invalid, 0 Unknown, 1214 Unchecked, 0.6s Time] [2022-01-18 05:35:50,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3530 states. [2022-01-18 05:35:50,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3530 to 2744. [2022-01-18 05:35:50,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2743 states have (on average 3.3357637623040466) internal successors, (9150), 2743 states have internal predecessors, (9150), 0 states have call successors, (0), 0 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 05:35:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 9150 transitions. [2022-01-18 05:35:50,056 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 9150 transitions. Word has length 24 [2022-01-18 05:35:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:50,056 INFO L470 AbstractCegarLoop]: Abstraction has 2744 states and 9150 transitions. [2022-01-18 05:35:50,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:35:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 9150 transitions. [2022-01-18 05:35:50,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:35:50,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:50,060 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:35:50,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Ended with exit code 0 [2022-01-18 05:35:50,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2022-01-18 05:35:50,260 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:35:50,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:50,261 INFO L85 PathProgramCache]: Analyzing trace with hash -145634084, now seen corresponding path program 1 times [2022-01-18 05:35:50,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:50,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581797005] [2022-01-18 05:35:50,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:50,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:50,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:50,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581797005] [2022-01-18 05:35:50,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581797005] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:50,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884385593] [2022-01-18 05:35:50,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:50,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:50,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:50,443 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:35:50,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-01-18 05:35:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:50,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:35:50,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:50,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:50,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:50,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:50,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:50,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:35:50,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:50,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:50,989 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:35:50,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:35:51,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:51,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:51,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:51,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:51,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:35:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:51,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884385593] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:51,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:51,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:35:51,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714796846] [2022-01-18 05:35:51,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:51,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:35:51,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:51,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:35:51,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:35:51,054 INFO L87 Difference]: Start difference. First operand 2744 states and 9150 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:35:52,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:52,430 INFO L93 Difference]: Finished difference Result 3704 states and 12061 transitions. [2022-01-18 05:35:52,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 05:35:52,430 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:35:52,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:52,437 INFO L225 Difference]: With dead ends: 3704 [2022-01-18 05:35:52,437 INFO L226 Difference]: Without dead ends: 3702 [2022-01-18 05:35:52,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=242, Invalid=2514, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 05:35:52,437 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 220 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 1814 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 2435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 584 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:52,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 267 Invalid, 2435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1814 Invalid, 0 Unknown, 584 Unchecked, 0.7s Time] [2022-01-18 05:35:52,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-01-18 05:35:52,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 2746. [2022-01-18 05:35:52,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2746 states, 2745 states have (on average 3.336976320582878) internal successors, (9160), 2745 states have internal predecessors, (9160), 0 states have call successors, (0), 0 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 05:35:52,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2746 states to 2746 states and 9160 transitions. [2022-01-18 05:35:52,479 INFO L78 Accepts]: Start accepts. Automaton has 2746 states and 9160 transitions. Word has length 24 [2022-01-18 05:35:52,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:52,479 INFO L470 AbstractCegarLoop]: Abstraction has 2746 states and 9160 transitions. [2022-01-18 05:35:52,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:35:52,479 INFO L276 IsEmpty]: Start isEmpty. Operand 2746 states and 9160 transitions. [2022-01-18 05:35:52,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:35:52,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:52,482 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:35:52,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Ended with exit code 0 [2022-01-18 05:35:52,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:52,683 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:35:52,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:52,683 INFO L85 PathProgramCache]: Analyzing trace with hash -2083192027, now seen corresponding path program 3 times [2022-01-18 05:35:52,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:52,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561573538] [2022-01-18 05:35:52,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:52,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:52,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:52,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:52,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561573538] [2022-01-18 05:35:52,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561573538] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:52,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469369430] [2022-01-18 05:35:52,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:35:52,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:52,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:52,873 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:35:52,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-01-18 05:35:52,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:35:52,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:52,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:35:52,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:53,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:53,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:53,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:53,187 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:35:53,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 05:35:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:53,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:53,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:53,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:53,815 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:35:53,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:35:53,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:53,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469369430] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:53,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:53,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-01-18 05:35:53,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091596590] [2022-01-18 05:35:53,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:53,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:35:53,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:53,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:35:53,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:35:53,908 INFO L87 Difference]: Start difference. First operand 2746 states and 9160 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:35:56,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:56,559 INFO L93 Difference]: Finished difference Result 3932 states and 13282 transitions. [2022-01-18 05:35:56,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 05:35:56,559 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:35:56,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:56,567 INFO L225 Difference]: With dead ends: 3932 [2022-01-18 05:35:56,567 INFO L226 Difference]: Without dead ends: 3928 [2022-01-18 05:35:56,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=612, Invalid=4644, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 05:35:56,567 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 175 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 2332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1478 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:56,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 181 Invalid, 2332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 814 Invalid, 0 Unknown, 1478 Unchecked, 0.3s Time] [2022-01-18 05:35:56,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3928 states. [2022-01-18 05:35:56,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3928 to 2769. [2022-01-18 05:35:56,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2769 states, 2768 states have (on average 3.328757225433526) internal successors, (9214), 2768 states have internal predecessors, (9214), 0 states have call successors, (0), 0 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 05:35:56,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2769 states to 2769 states and 9214 transitions. [2022-01-18 05:35:56,610 INFO L78 Accepts]: Start accepts. Automaton has 2769 states and 9214 transitions. Word has length 24 [2022-01-18 05:35:56,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:56,610 INFO L470 AbstractCegarLoop]: Abstraction has 2769 states and 9214 transitions. [2022-01-18 05:35:56,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:35:56,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2769 states and 9214 transitions. [2022-01-18 05:35:56,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:35:56,614 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:56,614 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:35:56,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Ended with exit code 0 [2022-01-18 05:35:56,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:56,815 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:35:56,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:56,815 INFO L85 PathProgramCache]: Analyzing trace with hash -707981535, now seen corresponding path program 4 times [2022-01-18 05:35:56,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:56,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117537102] [2022-01-18 05:35:56,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:56,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:57,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:57,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:57,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117537102] [2022-01-18 05:35:57,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117537102] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:57,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066587575] [2022-01-18 05:35:57,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:35:57,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:57,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:57,008 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:35:57,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-01-18 05:35:57,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:35:57,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:57,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:35:57,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:57,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:57,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:57,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:57,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:57,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:35:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:57,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:57,569 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:35:57,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:35:57,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:57,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:57,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:57,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:57,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:35:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:57,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066587575] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:57,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:57,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:35:57,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121129530] [2022-01-18 05:35:57,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:57,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:35:57,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:57,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:35:57,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:35:57,623 INFO L87 Difference]: Start difference. First operand 2769 states and 9214 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:35:58,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:35:58,420 INFO L93 Difference]: Finished difference Result 3161 states and 10431 transitions. [2022-01-18 05:35:58,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 05:35:58,420 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:35:58,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:35:58,426 INFO L225 Difference]: With dead ends: 3161 [2022-01-18 05:35:58,426 INFO L226 Difference]: Without dead ends: 3155 [2022-01-18 05:35:58,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=169, Invalid=1637, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 05:35:58,427 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 105 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 629 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:35:58,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 173 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1113 Invalid, 0 Unknown, 629 Unchecked, 0.4s Time] [2022-01-18 05:35:58,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3155 states. [2022-01-18 05:35:58,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3155 to 2773. [2022-01-18 05:35:58,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2773 states, 2772 states have (on average 3.327200577200577) internal successors, (9223), 2772 states have internal predecessors, (9223), 0 states have call successors, (0), 0 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 05:35:58,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2773 states to 2773 states and 9223 transitions. [2022-01-18 05:35:58,465 INFO L78 Accepts]: Start accepts. Automaton has 2773 states and 9223 transitions. Word has length 24 [2022-01-18 05:35:58,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:35:58,465 INFO L470 AbstractCegarLoop]: Abstraction has 2773 states and 9223 transitions. [2022-01-18 05:35:58,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:35:58,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2773 states and 9223 transitions. [2022-01-18 05:35:58,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:35:58,469 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:35:58,469 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:35:58,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Forceful destruction successful, exit code 0 [2022-01-18 05:35:58,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:58,669 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:35:58,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:35:58,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1132045153, now seen corresponding path program 5 times [2022-01-18 05:35:58,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:35:58,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494732065] [2022-01-18 05:35:58,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:35:58,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:35:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:35:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:58,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:35:58,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494732065] [2022-01-18 05:35:58,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494732065] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:35:58,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252411296] [2022-01-18 05:35:58,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:35:58,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:35:58,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:35:58,865 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:35:58,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-01-18 05:35:58,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:35:58,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:35:58,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:35:58,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:35:59,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:59,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:59,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:59,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:59,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:35:59,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:59,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:35:59,393 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:35:59,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:35:59,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:59,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:35:59,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:59,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:35:59,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:35:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:35:59,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252411296] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:35:59,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:35:59,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:35:59,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669670750] [2022-01-18 05:35:59,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:35:59,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:35:59,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:35:59,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:35:59,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:35:59,455 INFO L87 Difference]: Start difference. First operand 2773 states and 9223 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:36:00,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:00,517 INFO L93 Difference]: Finished difference Result 3090 states and 10233 transitions. [2022-01-18 05:36:00,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:36:00,518 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:36:00,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:00,523 INFO L225 Difference]: With dead ends: 3090 [2022-01-18 05:36:00,523 INFO L226 Difference]: Without dead ends: 3085 [2022-01-18 05:36:00,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=1454, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 05:36:00,523 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 115 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:00,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 101 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 960 Invalid, 0 Unknown, 166 Unchecked, 0.7s Time] [2022-01-18 05:36:00,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2022-01-18 05:36:00,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 2774. [2022-01-18 05:36:00,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2774 states, 2773 states have (on average 3.326721961774252) internal successors, (9225), 2773 states have internal predecessors, (9225), 0 states have call successors, (0), 0 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 05:36:00,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 9225 transitions. [2022-01-18 05:36:00,558 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 9225 transitions. Word has length 24 [2022-01-18 05:36:00,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:00,558 INFO L470 AbstractCegarLoop]: Abstraction has 2774 states and 9225 transitions. [2022-01-18 05:36:00,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:36:00,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 9225 transitions. [2022-01-18 05:36:00,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:36:00,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:00,562 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:36:00,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2022-01-18 05:36:00,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:00,762 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:36:00,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:00,763 INFO L85 PathProgramCache]: Analyzing trace with hash -675409310, now seen corresponding path program 2 times [2022-01-18 05:36:00,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:00,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029919131] [2022-01-18 05:36:00,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:00,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:00,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:00,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:00,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029919131] [2022-01-18 05:36:00,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029919131] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:00,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650696241] [2022-01-18 05:36:00,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:36:00,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:00,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:00,955 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:36:00,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-01-18 05:36:00,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:36:00,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:00,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:36:00,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:01,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:01,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:01,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:01,488 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:36:01,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 43 [2022-01-18 05:36:01,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:01,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:02,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:02,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:02,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:02,271 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:36:02,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 46 [2022-01-18 05:36:02,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:02,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650696241] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:02,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:02,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-01-18 05:36:02,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254930620] [2022-01-18 05:36:02,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:02,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:36:02,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:02,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:36:02,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:36:02,359 INFO L87 Difference]: Start difference. First operand 2774 states and 9225 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:03,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:03,050 INFO L93 Difference]: Finished difference Result 3203 states and 10594 transitions. [2022-01-18 05:36:03,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 05:36:03,051 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:36:03,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:03,056 INFO L225 Difference]: With dead ends: 3203 [2022-01-18 05:36:03,056 INFO L226 Difference]: Without dead ends: 3193 [2022-01-18 05:36:03,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=269, Invalid=1453, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 05:36:03,057 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 90 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 727 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:03,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 159 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 517 Invalid, 0 Unknown, 727 Unchecked, 0.2s Time] [2022-01-18 05:36:03,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3193 states. [2022-01-18 05:36:03,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3193 to 2816. [2022-01-18 05:36:03,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2815 states have (on average 3.3232682060390766) internal successors, (9355), 2815 states have internal predecessors, (9355), 0 states have call successors, (0), 0 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 05:36:03,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 9355 transitions. [2022-01-18 05:36:03,093 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 9355 transitions. Word has length 24 [2022-01-18 05:36:03,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:03,093 INFO L470 AbstractCegarLoop]: Abstraction has 2816 states and 9355 transitions. [2022-01-18 05:36:03,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:03,094 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 9355 transitions. [2022-01-18 05:36:03,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:36:03,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:03,097 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:36:03,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2022-01-18 05:36:03,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-01-18 05:36:03,297 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:36:03,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:03,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1669518013, now seen corresponding path program 6 times [2022-01-18 05:36:03,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:03,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261834364] [2022-01-18 05:36:03,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:03,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:03,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:03,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:03,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261834364] [2022-01-18 05:36:03,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261834364] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:03,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049389335] [2022-01-18 05:36:03,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:36:03,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:03,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:03,506 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:36:03,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-01-18 05:36:03,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:36:03,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:03,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:36:03,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:03,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:03,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:03,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:03,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:36:03,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2022-01-18 05:36:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:03,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:04,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:04,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:04,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:04,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:04,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2022-01-18 05:36:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:04,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049389335] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:04,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:04,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-01-18 05:36:04,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821115792] [2022-01-18 05:36:04,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:04,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:36:04,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:04,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:36:04,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:36:04,477 INFO L87 Difference]: Start difference. First operand 2816 states and 9355 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:36:06,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:06,140 INFO L93 Difference]: Finished difference Result 3691 states and 12172 transitions. [2022-01-18 05:36:06,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 05:36:06,140 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:36:06,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:06,147 INFO L225 Difference]: With dead ends: 3691 [2022-01-18 05:36:06,147 INFO L226 Difference]: Without dead ends: 3679 [2022-01-18 05:36:06,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=396, Invalid=3264, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 05:36:06,148 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 248 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 951 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:06,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 159 Invalid, 2290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1247 Invalid, 0 Unknown, 951 Unchecked, 0.5s Time] [2022-01-18 05:36:06,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3679 states. [2022-01-18 05:36:06,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3679 to 2821. [2022-01-18 05:36:06,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2821 states, 2820 states have (on average 3.322340425531915) internal successors, (9369), 2820 states have internal predecessors, (9369), 0 states have call successors, (0), 0 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 05:36:06,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2821 states to 2821 states and 9369 transitions. [2022-01-18 05:36:06,188 INFO L78 Accepts]: Start accepts. Automaton has 2821 states and 9369 transitions. Word has length 24 [2022-01-18 05:36:06,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:06,189 INFO L470 AbstractCegarLoop]: Abstraction has 2821 states and 9369 transitions. [2022-01-18 05:36:06,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:36:06,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2821 states and 9369 transitions. [2022-01-18 05:36:06,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:36:06,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:06,192 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:36:06,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2022-01-18 05:36:06,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-01-18 05:36:06,393 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:36:06,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:06,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1797751905, now seen corresponding path program 7 times [2022-01-18 05:36:06,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:06,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230749338] [2022-01-18 05:36:06,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:06,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:06,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:06,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230749338] [2022-01-18 05:36:06,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230749338] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:06,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168769642] [2022-01-18 05:36:06,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:36:06,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:06,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:06,617 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:36:06,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-01-18 05:36:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:06,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:36:06,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:06,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:06,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:06,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:06,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:06,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:36:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:06,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:07,145 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:36:07,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:36:07,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:07,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:07,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:07,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:07,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:36:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:07,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168769642] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:07,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:07,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:36:07,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805641471] [2022-01-18 05:36:07,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:07,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:36:07,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:07,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:36:07,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:36:07,209 INFO L87 Difference]: Start difference. First operand 2821 states and 9369 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:36:08,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:08,534 INFO L93 Difference]: Finished difference Result 3239 states and 10730 transitions. [2022-01-18 05:36:08,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 05:36:08,534 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:36:08,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:08,540 INFO L225 Difference]: With dead ends: 3239 [2022-01-18 05:36:08,540 INFO L226 Difference]: Without dead ends: 3233 [2022-01-18 05:36:08,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=291, Invalid=2159, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 05:36:08,540 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 97 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:08,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 155 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1730 Invalid, 0 Unknown, 187 Unchecked, 0.7s Time] [2022-01-18 05:36:08,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3233 states. [2022-01-18 05:36:08,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3233 to 2824. [2022-01-18 05:36:08,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2824 states, 2823 states have (on average 3.3209351753453773) internal successors, (9375), 2823 states have internal predecessors, (9375), 0 states have call successors, (0), 0 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 05:36:08,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 9375 transitions. [2022-01-18 05:36:08,575 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 9375 transitions. Word has length 24 [2022-01-18 05:36:08,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:08,575 INFO L470 AbstractCegarLoop]: Abstraction has 2824 states and 9375 transitions. [2022-01-18 05:36:08,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:36:08,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 9375 transitions. [2022-01-18 05:36:08,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:36:08,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:08,578 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:36:08,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2022-01-18 05:36:08,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:08,780 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:36:08,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:08,780 INFO L85 PathProgramCache]: Analyzing trace with hash -88843783, now seen corresponding path program 8 times [2022-01-18 05:36:08,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:08,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119831032] [2022-01-18 05:36:08,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:08,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:09,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:09,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119831032] [2022-01-18 05:36:09,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119831032] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:09,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303511410] [2022-01-18 05:36:09,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:36:09,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:09,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:09,001 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:36:09,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-01-18 05:36:09,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:36:09,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:09,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:36:09,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:09,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:09,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:09,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:09,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:36:09,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2022-01-18 05:36:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:09,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:09,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:09,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:09,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:36:09,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:36:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:10,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303511410] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:10,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:10,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:36:10,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714991392] [2022-01-18 05:36:10,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:10,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:36:10,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:10,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:36:10,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:36:10,049 INFO L87 Difference]: Start difference. First operand 2824 states and 9375 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:36:11,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:11,516 INFO L93 Difference]: Finished difference Result 3894 states and 13205 transitions. [2022-01-18 05:36:11,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 05:36:11,517 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:36:11,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:11,524 INFO L225 Difference]: With dead ends: 3894 [2022-01-18 05:36:11,524 INFO L226 Difference]: Without dead ends: 3884 [2022-01-18 05:36:11,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=388, Invalid=2264, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 05:36:11,525 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 969 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:11,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 177 Invalid, 2001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1015 Invalid, 0 Unknown, 969 Unchecked, 0.4s Time] [2022-01-18 05:36:11,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3884 states. [2022-01-18 05:36:11,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3884 to 2829. [2022-01-18 05:36:11,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2829 states, 2828 states have (on average 3.3185997171145685) internal successors, (9385), 2828 states have internal predecessors, (9385), 0 states have call successors, (0), 0 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 05:36:11,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2829 states to 2829 states and 9385 transitions. [2022-01-18 05:36:11,567 INFO L78 Accepts]: Start accepts. Automaton has 2829 states and 9385 transitions. Word has length 24 [2022-01-18 05:36:11,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:11,567 INFO L470 AbstractCegarLoop]: Abstraction has 2829 states and 9385 transitions. [2022-01-18 05:36:11,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:36:11,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2829 states and 9385 transitions. [2022-01-18 05:36:11,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:36:11,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:11,570 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:36:11,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Forceful destruction successful, exit code 0 [2022-01-18 05:36:11,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-01-18 05:36:11,783 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:36:11,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:11,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1169351643, now seen corresponding path program 9 times [2022-01-18 05:36:11,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:11,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679221300] [2022-01-18 05:36:11,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:11,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:12,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:12,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679221300] [2022-01-18 05:36:12,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679221300] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:12,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568750971] [2022-01-18 05:36:12,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:36:12,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:12,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:12,005 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:36:12,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-01-18 05:36:12,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:36:12,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:12,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:36:12,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:12,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:12,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:12,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:12,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:12,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-01-18 05:36:12,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:12,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:12,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:12,717 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:36:12,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-01-18 05:36:12,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:12,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568750971] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:12,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:12,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:36:12,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496818565] [2022-01-18 05:36:12,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:12,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:36:12,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:12,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:36:12,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:36:12,803 INFO L87 Difference]: Start difference. First operand 2829 states and 9385 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:13,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:13,679 INFO L93 Difference]: Finished difference Result 3115 states and 10344 transitions. [2022-01-18 05:36:13,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 05:36:13,679 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:36:13,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:13,685 INFO L225 Difference]: With dead ends: 3115 [2022-01-18 05:36:13,686 INFO L226 Difference]: Without dead ends: 3109 [2022-01-18 05:36:13,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=226, Invalid=1496, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 05:36:13,686 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 84 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 920 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:13,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 129 Invalid, 2166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1238 Invalid, 0 Unknown, 920 Unchecked, 0.4s Time] [2022-01-18 05:36:13,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2022-01-18 05:36:13,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 2831. [2022-01-18 05:36:13,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2831 states, 2830 states have (on average 3.317667844522968) internal successors, (9389), 2830 states have internal predecessors, (9389), 0 states have call successors, (0), 0 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 05:36:13,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2831 states to 2831 states and 9389 transitions. [2022-01-18 05:36:13,729 INFO L78 Accepts]: Start accepts. Automaton has 2831 states and 9389 transitions. Word has length 24 [2022-01-18 05:36:13,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:13,729 INFO L470 AbstractCegarLoop]: Abstraction has 2831 states and 9389 transitions. [2022-01-18 05:36:13,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:13,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2831 states and 9389 transitions. [2022-01-18 05:36:13,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:36:13,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:13,733 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:36:13,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Forceful destruction successful, exit code 0 [2022-01-18 05:36:13,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2022-01-18 05:36:13,934 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:36:13,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:13,934 INFO L85 PathProgramCache]: Analyzing trace with hash 979444893, now seen corresponding path program 10 times [2022-01-18 05:36:13,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:13,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709047885] [2022-01-18 05:36:13,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:13,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:14,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:14,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709047885] [2022-01-18 05:36:14,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709047885] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:14,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217144362] [2022-01-18 05:36:14,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:36:14,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:14,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:14,157 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:36:14,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-01-18 05:36:14,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:36:14,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:14,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:36:14,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:14,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:14,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:14,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:14,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:14,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-01-18 05:36:14,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:14,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:14,678 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:36:14,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:36:14,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:14,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:14,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:14,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:14,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:36:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:14,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217144362] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:14,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:14,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:36:14,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382398052] [2022-01-18 05:36:14,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:14,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:36:14,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:14,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:36:14,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:36:14,736 INFO L87 Difference]: Start difference. First operand 2831 states and 9389 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:15,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:15,636 INFO L93 Difference]: Finished difference Result 3104 states and 10273 transitions. [2022-01-18 05:36:15,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 05:36:15,636 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:36:15,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:15,642 INFO L225 Difference]: With dead ends: 3104 [2022-01-18 05:36:15,642 INFO L226 Difference]: Without dead ends: 3090 [2022-01-18 05:36:15,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 05:36:15,642 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 95 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 458 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:15,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 109 Invalid, 1795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1319 Invalid, 0 Unknown, 458 Unchecked, 0.5s Time] [2022-01-18 05:36:15,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3090 states. [2022-01-18 05:36:15,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3090 to 2827. [2022-01-18 05:36:15,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2827 states, 2826 states have (on average 3.319532908704883) internal successors, (9381), 2826 states have internal predecessors, (9381), 0 states have call successors, (0), 0 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 05:36:15,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 9381 transitions. [2022-01-18 05:36:15,679 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 9381 transitions. Word has length 24 [2022-01-18 05:36:15,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:15,679 INFO L470 AbstractCegarLoop]: Abstraction has 2827 states and 9381 transitions. [2022-01-18 05:36:15,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:36:15,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 9381 transitions. [2022-01-18 05:36:15,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:36:15,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:15,683 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:36:15,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Forceful destruction successful, exit code 0 [2022-01-18 05:36:15,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:15,883 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:36:15,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:15,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1715641972, now seen corresponding path program 20 times [2022-01-18 05:36:15,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:15,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564684301] [2022-01-18 05:36:15,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:15,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:16,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:16,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564684301] [2022-01-18 05:36:16,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564684301] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:16,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476500718] [2022-01-18 05:36:16,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:36:16,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:16,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:16,065 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:36:16,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-01-18 05:36:16,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:36:16,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:16,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:36:16,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:16,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:16,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:16,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:16,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:16,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-01-18 05:36:16,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:16,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:16,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:16,943 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:36:16,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-01-18 05:36:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:17,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476500718] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:17,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:17,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-01-18 05:36:17,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056929267] [2022-01-18 05:36:17,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:17,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:36:17,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:17,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:36:17,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:36:17,018 INFO L87 Difference]: Start difference. First operand 2827 states and 9381 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:36:18,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:18,774 INFO L93 Difference]: Finished difference Result 3858 states and 12515 transitions. [2022-01-18 05:36:18,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 05:36:18,774 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:36:18,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:18,781 INFO L225 Difference]: With dead ends: 3858 [2022-01-18 05:36:18,782 INFO L226 Difference]: Without dead ends: 3854 [2022-01-18 05:36:18,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=347, Invalid=2959, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 05:36:18,782 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 169 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 2120 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 3147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1013 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:18,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 305 Invalid, 3147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2120 Invalid, 0 Unknown, 1013 Unchecked, 0.8s Time] [2022-01-18 05:36:18,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3854 states. [2022-01-18 05:36:18,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3854 to 2849. [2022-01-18 05:36:18,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2848 states have (on average 3.315308988764045) internal successors, (9442), 2848 states have internal predecessors, (9442), 0 states have call successors, (0), 0 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 05:36:18,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 9442 transitions. [2022-01-18 05:36:18,826 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 9442 transitions. Word has length 24 [2022-01-18 05:36:18,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:18,826 INFO L470 AbstractCegarLoop]: Abstraction has 2849 states and 9442 transitions. [2022-01-18 05:36:18,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:36:18,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 9442 transitions. [2022-01-18 05:36:18,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:36:18,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:18,830 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:36:18,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Forceful destruction successful, exit code 0 [2022-01-18 05:36:19,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2022-01-18 05:36:19,031 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:36:19,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:19,031 INFO L85 PathProgramCache]: Analyzing trace with hash 425277236, now seen corresponding path program 21 times [2022-01-18 05:36:19,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:19,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120570369] [2022-01-18 05:36:19,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:19,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:19,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:19,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120570369] [2022-01-18 05:36:19,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120570369] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:19,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336661866] [2022-01-18 05:36:19,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:36:19,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:19,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:19,216 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:36:19,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-01-18 05:36:19,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:36:19,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:19,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:36:19,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:19,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:19,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:19,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:19,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:36:19,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 05:36:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:19,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:20,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:20,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:20,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:36:20,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:36:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:20,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336661866] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:20,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:20,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-01-18 05:36:20,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114256428] [2022-01-18 05:36:20,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:20,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:36:20,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:20,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:36:20,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:36:20,236 INFO L87 Difference]: Start difference. First operand 2849 states and 9442 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:36:22,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:22,663 INFO L93 Difference]: Finished difference Result 4571 states and 14831 transitions. [2022-01-18 05:36:22,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-18 05:36:22,663 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:36:22,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:22,671 INFO L225 Difference]: With dead ends: 4571 [2022-01-18 05:36:22,671 INFO L226 Difference]: Without dead ends: 4548 [2022-01-18 05:36:22,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2187 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=609, Invalid=6701, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 05:36:22,672 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 243 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 3505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1898 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:22,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 334 Invalid, 3505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1570 Invalid, 0 Unknown, 1898 Unchecked, 0.6s Time] [2022-01-18 05:36:22,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4548 states. [2022-01-18 05:36:22,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4548 to 2893. [2022-01-18 05:36:22,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2893 states, 2892 states have (on average 3.3029045643153525) internal successors, (9552), 2892 states have internal predecessors, (9552), 0 states have call successors, (0), 0 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 05:36:22,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2893 states to 2893 states and 9552 transitions. [2022-01-18 05:36:22,721 INFO L78 Accepts]: Start accepts. Automaton has 2893 states and 9552 transitions. Word has length 24 [2022-01-18 05:36:22,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:22,721 INFO L470 AbstractCegarLoop]: Abstraction has 2893 states and 9552 transitions. [2022-01-18 05:36:22,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:36:22,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2893 states and 9552 transitions. [2022-01-18 05:36:22,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:36:22,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:22,725 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:36:22,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Ended with exit code 0 [2022-01-18 05:36:22,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:22,926 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:36:22,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:22,926 INFO L85 PathProgramCache]: Analyzing trace with hash -839168338, now seen corresponding path program 22 times [2022-01-18 05:36:22,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:22,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185170727] [2022-01-18 05:36:22,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:22,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:23,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:23,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185170727] [2022-01-18 05:36:23,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185170727] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:23,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852556620] [2022-01-18 05:36:23,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:36:23,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:23,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:23,105 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:36:23,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-01-18 05:36:23,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:36:23,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:23,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:36:23,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:23,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:23,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:23,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:23,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:23,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:36:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:23,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:23,643 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:36:23,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:36:23,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:23,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:23,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:23,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:23,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:36:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:23,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852556620] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:23,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:23,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:36:23,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602703743] [2022-01-18 05:36:23,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:23,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:36:23,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:23,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:36:23,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:36:23,709 INFO L87 Difference]: Start difference. First operand 2893 states and 9552 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:36:25,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:25,258 INFO L93 Difference]: Finished difference Result 3909 states and 12712 transitions. [2022-01-18 05:36:25,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 05:36:25,259 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:36:25,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:25,266 INFO L225 Difference]: With dead ends: 3909 [2022-01-18 05:36:25,266 INFO L226 Difference]: Without dead ends: 3903 [2022-01-18 05:36:25,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=259, Invalid=2393, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 05:36:25,266 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 203 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 3470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1388 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:25,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 272 Invalid, 3470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2051 Invalid, 0 Unknown, 1388 Unchecked, 0.8s Time] [2022-01-18 05:36:25,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3903 states. [2022-01-18 05:36:25,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3903 to 2884. [2022-01-18 05:36:25,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2884 states, 2883 states have (on average 3.3066250433576134) internal successors, (9533), 2883 states have internal predecessors, (9533), 0 states have call successors, (0), 0 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 05:36:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2884 states to 2884 states and 9533 transitions. [2022-01-18 05:36:25,311 INFO L78 Accepts]: Start accepts. Automaton has 2884 states and 9533 transitions. Word has length 24 [2022-01-18 05:36:25,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:25,311 INFO L470 AbstractCegarLoop]: Abstraction has 2884 states and 9533 transitions. [2022-01-18 05:36:25,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:36:25,311 INFO L276 IsEmpty]: Start isEmpty. Operand 2884 states and 9533 transitions. [2022-01-18 05:36:25,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:36:25,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:25,315 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:36:25,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Ended with exit code 0 [2022-01-18 05:36:25,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:25,515 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:36:25,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:25,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1168030766, now seen corresponding path program 23 times [2022-01-18 05:36:25,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:25,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818559940] [2022-01-18 05:36:25,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:25,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:25,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:25,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818559940] [2022-01-18 05:36:25,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818559940] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:25,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760908349] [2022-01-18 05:36:25,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:36:25,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:25,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:25,695 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:36:25,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-01-18 05:36:25,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:36:25,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:25,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:36:25,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:25,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:25,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:25,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:25,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:25,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:36:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:26,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:26,237 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:36:26,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:36:26,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:26,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:26,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:26,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:26,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:36:26,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:26,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760908349] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:26,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:26,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:36:26,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668656493] [2022-01-18 05:36:26,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:26,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:36:26,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:26,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:36:26,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:36:26,292 INFO L87 Difference]: Start difference. First operand 2884 states and 9533 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:36:27,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:27,536 INFO L93 Difference]: Finished difference Result 3563 states and 11679 transitions. [2022-01-18 05:36:27,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 05:36:27,537 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:36:27,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:27,543 INFO L225 Difference]: With dead ends: 3563 [2022-01-18 05:36:27,543 INFO L226 Difference]: Without dead ends: 3559 [2022-01-18 05:36:27,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=243, Invalid=2307, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 05:36:27,544 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 167 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 1640 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 2652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 984 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:27,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 255 Invalid, 2652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1640 Invalid, 0 Unknown, 984 Unchecked, 0.6s Time] [2022-01-18 05:36:27,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3559 states. [2022-01-18 05:36:27,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3559 to 2881. [2022-01-18 05:36:27,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 2880 states have (on average 3.3072916666666665) internal successors, (9525), 2880 states have internal predecessors, (9525), 0 states have call successors, (0), 0 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 05:36:27,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 9525 transitions. [2022-01-18 05:36:27,585 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 9525 transitions. Word has length 24 [2022-01-18 05:36:27,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:27,585 INFO L470 AbstractCegarLoop]: Abstraction has 2881 states and 9525 transitions. [2022-01-18 05:36:27,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:36:27,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 9525 transitions. [2022-01-18 05:36:27,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:36:27,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:27,588 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:36:27,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Ended with exit code 0 [2022-01-18 05:36:27,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:27,789 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:36:27,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:27,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1862490956, now seen corresponding path program 24 times [2022-01-18 05:36:27,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:27,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782269685] [2022-01-18 05:36:27,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:27,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:27,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:27,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782269685] [2022-01-18 05:36:27,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782269685] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:27,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790325864] [2022-01-18 05:36:27,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:36:27,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:27,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:27,969 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:36:27,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-01-18 05:36:27,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:36:27,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:27,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 05:36:27,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:28,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:28,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:28,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:36:28,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 53 [2022-01-18 05:36:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:28,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:29,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:29,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:29,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:29,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:29,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 7 [2022-01-18 05:36:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:29,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790325864] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:29,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:29,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-01-18 05:36:29,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953651177] [2022-01-18 05:36:29,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:29,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:36:29,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:29,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:36:29,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:36:29,398 INFO L87 Difference]: Start difference. First operand 2881 states and 9525 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:36:30,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:30,447 INFO L93 Difference]: Finished difference Result 3552 states and 11594 transitions. [2022-01-18 05:36:30,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 05:36:30,447 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:36:30,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:30,453 INFO L225 Difference]: With dead ends: 3552 [2022-01-18 05:36:30,453 INFO L226 Difference]: Without dead ends: 3550 [2022-01-18 05:36:30,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=208, Invalid=1862, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:36:30,453 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 175 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1224 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:30,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 241 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 967 Invalid, 0 Unknown, 1224 Unchecked, 0.4s Time] [2022-01-18 05:36:30,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2022-01-18 05:36:30,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2881. [2022-01-18 05:36:30,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 2880 states have (on average 3.307986111111111) internal successors, (9527), 2880 states have internal predecessors, (9527), 0 states have call successors, (0), 0 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 05:36:30,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 9527 transitions. [2022-01-18 05:36:30,489 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 9527 transitions. Word has length 24 [2022-01-18 05:36:30,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:30,489 INFO L470 AbstractCegarLoop]: Abstraction has 2881 states and 9527 transitions. [2022-01-18 05:36:30,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:36:30,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 9527 transitions. [2022-01-18 05:36:30,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:36:30,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:30,492 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:36:30,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2022-01-18 05:36:30,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:30,693 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:36:30,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:30,693 INFO L85 PathProgramCache]: Analyzing trace with hash 2073766699, now seen corresponding path program 11 times [2022-01-18 05:36:30,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:30,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698887471] [2022-01-18 05:36:30,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:30,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:30,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:30,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698887471] [2022-01-18 05:36:30,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698887471] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:30,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059397709] [2022-01-18 05:36:30,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:36:30,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:30,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:30,873 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:36:30,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-01-18 05:36:30,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:36:30,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:30,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:36:30,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:31,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:31,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:31,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:31,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:31,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:36:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:31,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:31,400 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:36:31,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:36:31,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:31,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:31,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:31,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:31,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:36:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:31,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059397709] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:31,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:31,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:36:31,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122221060] [2022-01-18 05:36:31,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:31,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:36:31,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:31,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:36:31,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:36:31,461 INFO L87 Difference]: Start difference. First operand 2881 states and 9527 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:36:33,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:33,029 INFO L93 Difference]: Finished difference Result 3635 states and 11750 transitions. [2022-01-18 05:36:33,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 05:36:33,030 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:36:33,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:33,036 INFO L225 Difference]: With dead ends: 3635 [2022-01-18 05:36:33,036 INFO L226 Difference]: Without dead ends: 3629 [2022-01-18 05:36:33,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=255, Invalid=2397, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 05:36:33,037 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 141 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 2216 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 2579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 334 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:33,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 246 Invalid, 2579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2216 Invalid, 0 Unknown, 334 Unchecked, 0.8s Time] [2022-01-18 05:36:33,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3629 states. [2022-01-18 05:36:33,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3629 to 2899. [2022-01-18 05:36:33,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2899 states, 2898 states have (on average 3.303312629399586) internal successors, (9573), 2898 states have internal predecessors, (9573), 0 states have call successors, (0), 0 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 05:36:33,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2899 states to 2899 states and 9573 transitions. [2022-01-18 05:36:33,081 INFO L78 Accepts]: Start accepts. Automaton has 2899 states and 9573 transitions. Word has length 24 [2022-01-18 05:36:33,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:33,081 INFO L470 AbstractCegarLoop]: Abstraction has 2899 states and 9573 transitions. [2022-01-18 05:36:33,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:36:33,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2899 states and 9573 transitions. [2022-01-18 05:36:33,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:36:33,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:33,085 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:36:33,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Forceful destruction successful, exit code 0 [2022-01-18 05:36:33,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2022-01-18 05:36:33,285 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:36:33,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:33,285 INFO L85 PathProgramCache]: Analyzing trace with hash -80281389, now seen corresponding path program 12 times [2022-01-18 05:36:33,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:33,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139897674] [2022-01-18 05:36:33,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:33,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:33,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:33,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:33,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139897674] [2022-01-18 05:36:33,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139897674] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:33,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069612010] [2022-01-18 05:36:33,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:36:33,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:33,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:33,467 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:36:33,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-01-18 05:36:33,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:36:33,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:33,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:36:33,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:33,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:33,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:33,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:33,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:33,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:36:33,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:33,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:34,000 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:36:34,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:36:34,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:34,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:34,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:34,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:34,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:36:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:34,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069612010] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:34,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:34,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:36:34,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443210469] [2022-01-18 05:36:34,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:34,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:36:34,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:34,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:36:34,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:36:34,065 INFO L87 Difference]: Start difference. First operand 2899 states and 9573 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:36:35,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:35,557 INFO L93 Difference]: Finished difference Result 3653 states and 11797 transitions. [2022-01-18 05:36:35,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 05:36:35,557 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:36:35,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:35,563 INFO L225 Difference]: With dead ends: 3653 [2022-01-18 05:36:35,563 INFO L226 Difference]: Without dead ends: 3649 [2022-01-18 05:36:35,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=248, Invalid=2302, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 05:36:35,564 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 183 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 1991 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 2772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 740 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:35,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 223 Invalid, 2772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1991 Invalid, 0 Unknown, 740 Unchecked, 0.7s Time] [2022-01-18 05:36:35,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3649 states. [2022-01-18 05:36:35,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3649 to 2897. [2022-01-18 05:36:35,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2897 states, 2896 states have (on average 3.304558011049724) internal successors, (9570), 2896 states have internal predecessors, (9570), 0 states have call successors, (0), 0 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 05:36:35,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2897 states to 2897 states and 9570 transitions. [2022-01-18 05:36:35,603 INFO L78 Accepts]: Start accepts. Automaton has 2897 states and 9570 transitions. Word has length 24 [2022-01-18 05:36:35,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:35,604 INFO L470 AbstractCegarLoop]: Abstraction has 2897 states and 9570 transitions. [2022-01-18 05:36:35,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:36:35,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2897 states and 9570 transitions. [2022-01-18 05:36:35,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:36:35,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:35,607 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:36:35,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Forceful destruction successful, exit code 0 [2022-01-18 05:36:35,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:35,807 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:36:35,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:35,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1344726963, now seen corresponding path program 13 times [2022-01-18 05:36:35,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:35,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386013] [2022-01-18 05:36:35,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:35,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:36,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:36,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386013] [2022-01-18 05:36:36,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386013] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:36,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569402373] [2022-01-18 05:36:36,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:36:36,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:36,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:36,009 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:36:36,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:36,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:36:36,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:36,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-01-18 05:36:36,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:36,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:36,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:36,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:36,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:36:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:36,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:36,559 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:36:36,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:36:36,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:36,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:36,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:36,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:36,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:36:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:36,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569402373] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:36,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:36,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:36:36,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925211180] [2022-01-18 05:36:36,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:36,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:36:36,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:36,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:36:36,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:36:36,617 INFO L87 Difference]: Start difference. First operand 2897 states and 9570 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:36:38,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:38,222 INFO L93 Difference]: Finished difference Result 3770 states and 12207 transitions. [2022-01-18 05:36:38,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 05:36:38,223 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:36:38,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:38,230 INFO L225 Difference]: With dead ends: 3770 [2022-01-18 05:36:38,230 INFO L226 Difference]: Without dead ends: 3765 [2022-01-18 05:36:38,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=264, Invalid=2492, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 05:36:38,230 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 174 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 2140 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 2722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 548 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:38,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 250 Invalid, 2722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2140 Invalid, 0 Unknown, 548 Unchecked, 0.8s Time] [2022-01-18 05:36:38,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3765 states. [2022-01-18 05:36:38,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3765 to 2894. [2022-01-18 05:36:38,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2894 states, 2893 states have (on average 3.3066021431040444) internal successors, (9566), 2893 states have internal predecessors, (9566), 0 states have call successors, (0), 0 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 05:36:38,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 9566 transitions. [2022-01-18 05:36:38,273 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 9566 transitions. Word has length 24 [2022-01-18 05:36:38,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:38,273 INFO L470 AbstractCegarLoop]: Abstraction has 2894 states and 9566 transitions. [2022-01-18 05:36:38,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:36:38,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 9566 transitions. [2022-01-18 05:36:38,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:36:38,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:38,277 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:36:38,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Ended with exit code 0 [2022-01-18 05:36:38,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-01-18 05:36:38,478 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:36:38,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:38,478 INFO L85 PathProgramCache]: Analyzing trace with hash -298378899, now seen corresponding path program 14 times [2022-01-18 05:36:38,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:38,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367632105] [2022-01-18 05:36:38,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:38,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:38,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:38,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367632105] [2022-01-18 05:36:38,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367632105] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:38,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426323340] [2022-01-18 05:36:38,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:36:38,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:38,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:38,658 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:36:38,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-01-18 05:36:38,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:36:38,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:38,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:36:38,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:38,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:38,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:38,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:39,002 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:36:39,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2022-01-18 05:36:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:39,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:39,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:39,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:39,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:39,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:39,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2022-01-18 05:36:39,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:39,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426323340] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:39,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:39,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-01-18 05:36:39,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113945433] [2022-01-18 05:36:39,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:39,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:36:39,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:39,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:36:39,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:36:39,628 INFO L87 Difference]: Start difference. First operand 2894 states and 9566 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:36:41,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:41,439 INFO L93 Difference]: Finished difference Result 3599 states and 11791 transitions. [2022-01-18 05:36:41,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 05:36:41,439 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:36:41,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:41,446 INFO L225 Difference]: With dead ends: 3599 [2022-01-18 05:36:41,446 INFO L226 Difference]: Without dead ends: 3588 [2022-01-18 05:36:41,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=399, Invalid=3761, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 05:36:41,447 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 187 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 2288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 736 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:41,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 226 Invalid, 2288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1504 Invalid, 0 Unknown, 736 Unchecked, 0.6s Time] [2022-01-18 05:36:41,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3588 states. [2022-01-18 05:36:41,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3588 to 2903. [2022-01-18 05:36:41,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2903 states, 2902 states have (on average 3.304272915230875) internal successors, (9589), 2902 states have internal predecessors, (9589), 0 states have call successors, (0), 0 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 05:36:41,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 9589 transitions. [2022-01-18 05:36:41,488 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 9589 transitions. Word has length 24 [2022-01-18 05:36:41,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:41,488 INFO L470 AbstractCegarLoop]: Abstraction has 2903 states and 9589 transitions. [2022-01-18 05:36:41,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:36:41,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 9589 transitions. [2022-01-18 05:36:41,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:36:41,491 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:41,492 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:36:41,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Forceful destruction successful, exit code 0 [2022-01-18 05:36:41,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-01-18 05:36:41,692 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:36:41,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:41,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2095330258, now seen corresponding path program 3 times [2022-01-18 05:36:41,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:41,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144901374] [2022-01-18 05:36:41,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:41,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:41,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:41,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144901374] [2022-01-18 05:36:41,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144901374] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:41,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284720671] [2022-01-18 05:36:41,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:36:41,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:41,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:41,888 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:36:41,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-01-18 05:36:41,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:36:41,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:41,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:36:41,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:42,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:42,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:42,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:42,217 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:36:42,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 05:36:42,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:42,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:42,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:42,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:42,843 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:36:42,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:36:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:42,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284720671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:42,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:42,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-01-18 05:36:42,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560415620] [2022-01-18 05:36:42,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:42,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:36:42,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:42,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:36:42,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:36:42,922 INFO L87 Difference]: Start difference. First operand 2903 states and 9589 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:36:45,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:45,400 INFO L93 Difference]: Finished difference Result 4287 states and 14504 transitions. [2022-01-18 05:36:45,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 05:36:45,401 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:36:45,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:45,408 INFO L225 Difference]: With dead ends: 4287 [2022-01-18 05:36:45,408 INFO L226 Difference]: Without dead ends: 4283 [2022-01-18 05:36:45,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1343 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=534, Invalid=4722, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 05:36:45,409 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 156 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 2193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1308 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:45,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 187 Invalid, 2193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 839 Invalid, 0 Unknown, 1308 Unchecked, 0.3s Time] [2022-01-18 05:36:45,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4283 states. [2022-01-18 05:36:45,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4283 to 2917. [2022-01-18 05:36:45,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2917 states, 2916 states have (on average 3.300068587105624) internal successors, (9623), 2916 states have internal predecessors, (9623), 0 states have call successors, (0), 0 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 05:36:45,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2917 states to 2917 states and 9623 transitions. [2022-01-18 05:36:45,452 INFO L78 Accepts]: Start accepts. Automaton has 2917 states and 9623 transitions. Word has length 24 [2022-01-18 05:36:45,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:45,452 INFO L470 AbstractCegarLoop]: Abstraction has 2917 states and 9623 transitions. [2022-01-18 05:36:45,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:36:45,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2917 states and 9623 transitions. [2022-01-18 05:36:45,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:36:45,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:45,456 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:36:45,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2022-01-18 05:36:45,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2022-01-18 05:36:45,656 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:36:45,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:45,656 INFO L85 PathProgramCache]: Analyzing trace with hash -485076915, now seen corresponding path program 15 times [2022-01-18 05:36:45,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:45,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106105432] [2022-01-18 05:36:45,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:45,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:45,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:45,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106105432] [2022-01-18 05:36:45,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106105432] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:45,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27805084] [2022-01-18 05:36:45,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:36:45,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:45,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:45,835 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:36:45,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-01-18 05:36:45,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:36:45,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:45,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:36:45,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:46,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:46,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:46,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:46,131 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:36:46,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 05:36:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:46,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:46,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:46,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:46,732 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:36:46,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:36:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:46,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27805084] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:46,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:46,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:36:46,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266755752] [2022-01-18 05:36:46,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:46,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:36:46,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:46,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:36:46,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:36:46,802 INFO L87 Difference]: Start difference. First operand 2917 states and 9623 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:36:47,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:47,493 INFO L93 Difference]: Finished difference Result 4262 states and 14510 transitions. [2022-01-18 05:36:47,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 05:36:47,494 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:36:47,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:47,501 INFO L225 Difference]: With dead ends: 4262 [2022-01-18 05:36:47,501 INFO L226 Difference]: Without dead ends: 4257 [2022-01-18 05:36:47,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=250, Invalid=1730, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 05:36:47,501 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 164 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1343 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:47,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 212 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 452 Invalid, 0 Unknown, 1343 Unchecked, 0.2s Time] [2022-01-18 05:36:47,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4257 states. [2022-01-18 05:36:47,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4257 to 2954. [2022-01-18 05:36:47,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 2953 states have (on average 3.3064679986454455) internal successors, (9764), 2953 states have internal predecessors, (9764), 0 states have call successors, (0), 0 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 05:36:47,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 9764 transitions. [2022-01-18 05:36:47,546 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 9764 transitions. Word has length 24 [2022-01-18 05:36:47,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:47,546 INFO L470 AbstractCegarLoop]: Abstraction has 2954 states and 9764 transitions. [2022-01-18 05:36:47,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:36:47,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 9764 transitions. [2022-01-18 05:36:47,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:36:47,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:47,550 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:36:47,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Forceful destruction successful, exit code 0 [2022-01-18 05:36:47,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:47,750 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:36:47,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:47,751 INFO L85 PathProgramCache]: Analyzing trace with hash 932179860, now seen corresponding path program 4 times [2022-01-18 05:36:47,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:47,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146971168] [2022-01-18 05:36:47,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:47,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:47,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:47,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:47,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146971168] [2022-01-18 05:36:47,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146971168] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:47,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226801385] [2022-01-18 05:36:47,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:36:47,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:47,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:47,937 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:36:47,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-01-18 05:36:47,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:36:47,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:47,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:36:47,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:48,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:48,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:48,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:48,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:48,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:36:48,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:48,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:48,483 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:36:48,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:36:48,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:48,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:48,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:48,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:48,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:36:48,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:48,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226801385] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:48,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:48,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:36:48,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393461247] [2022-01-18 05:36:48,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:48,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:36:48,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:48,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:36:48,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:36:48,548 INFO L87 Difference]: Start difference. First operand 2954 states and 9764 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:36:50,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:50,039 INFO L93 Difference]: Finished difference Result 3975 states and 12950 transitions. [2022-01-18 05:36:50,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 05:36:50,039 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:36:50,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:50,046 INFO L225 Difference]: With dead ends: 3975 [2022-01-18 05:36:50,046 INFO L226 Difference]: Without dead ends: 3969 [2022-01-18 05:36:50,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=264, Invalid=2492, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 05:36:50,046 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 219 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 1859 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 3090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1199 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:50,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 221 Invalid, 3090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1859 Invalid, 0 Unknown, 1199 Unchecked, 0.7s Time] [2022-01-18 05:36:50,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3969 states. [2022-01-18 05:36:50,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3969 to 2940. [2022-01-18 05:36:50,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2940 states, 2939 states have (on average 3.307587614834978) internal successors, (9721), 2939 states have internal predecessors, (9721), 0 states have call successors, (0), 0 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 05:36:50,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2940 states to 2940 states and 9721 transitions. [2022-01-18 05:36:50,088 INFO L78 Accepts]: Start accepts. Automaton has 2940 states and 9721 transitions. Word has length 24 [2022-01-18 05:36:50,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:50,088 INFO L470 AbstractCegarLoop]: Abstraction has 2940 states and 9721 transitions. [2022-01-18 05:36:50,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:36:50,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2940 states and 9721 transitions. [2022-01-18 05:36:50,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:36:50,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:50,092 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:36:50,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Ended with exit code 0 [2022-01-18 05:36:50,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:50,293 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:36:50,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:50,293 INFO L85 PathProgramCache]: Analyzing trace with hash -611607669, now seen corresponding path program 16 times [2022-01-18 05:36:50,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:50,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212229795] [2022-01-18 05:36:50,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:50,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:50,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:50,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212229795] [2022-01-18 05:36:50,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212229795] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:50,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472274419] [2022-01-18 05:36:50,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:36:50,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:50,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:50,491 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:36:50,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-01-18 05:36:50,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:36:50,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:50,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:36:50,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:50,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:50,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:50,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:50,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:50,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:36:50,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:50,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:51,008 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:36:51,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:36:51,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:51,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:51,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:51,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:51,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:36:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:51,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472274419] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:51,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:51,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:36:51,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221177501] [2022-01-18 05:36:51,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:51,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:36:51,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:51,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:36:51,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:36:51,064 INFO L87 Difference]: Start difference. First operand 2940 states and 9721 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:36:52,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:52,567 INFO L93 Difference]: Finished difference Result 4059 states and 13380 transitions. [2022-01-18 05:36:52,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 05:36:52,567 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:36:52,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:52,574 INFO L225 Difference]: With dead ends: 4059 [2022-01-18 05:36:52,574 INFO L226 Difference]: Without dead ends: 4053 [2022-01-18 05:36:52,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=369, Invalid=2823, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 05:36:52,574 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 174 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:52,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 176 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1258 Invalid, 0 Unknown, 193 Unchecked, 0.5s Time] [2022-01-18 05:36:52,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4053 states. [2022-01-18 05:36:52,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4053 to 2954. [2022-01-18 05:36:52,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 2953 states have (on average 3.304436166610227) internal successors, (9758), 2953 states have internal predecessors, (9758), 0 states have call successors, (0), 0 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 05:36:52,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 9758 transitions. [2022-01-18 05:36:52,616 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 9758 transitions. Word has length 24 [2022-01-18 05:36:52,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:52,616 INFO L470 AbstractCegarLoop]: Abstraction has 2954 states and 9758 transitions. [2022-01-18 05:36:52,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:36:52,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 9758 transitions. [2022-01-18 05:36:52,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:36:52,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:52,620 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:36:52,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Forceful destruction successful, exit code 0 [2022-01-18 05:36:52,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:52,820 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:36:52,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:52,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1875905164, now seen corresponding path program 5 times [2022-01-18 05:36:52,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:52,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859138120] [2022-01-18 05:36:52,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:52,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:53,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:53,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859138120] [2022-01-18 05:36:53,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859138120] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:53,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523601786] [2022-01-18 05:36:53,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:36:53,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:53,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:53,019 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:36:53,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-01-18 05:36:53,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:36:53,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:53,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:36:53,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:53,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:53,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:53,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:53,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:53,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:36:53,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:53,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:53,547 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:36:53,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:36:53,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:53,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:53,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:53,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:53,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:36:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:53,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523601786] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:53,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:53,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:36:53,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12142491] [2022-01-18 05:36:53,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:53,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:36:53,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:53,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:36:53,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:36:53,614 INFO L87 Difference]: Start difference. First operand 2954 states and 9758 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:36:55,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:55,045 INFO L93 Difference]: Finished difference Result 4296 states and 14293 transitions. [2022-01-18 05:36:55,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 05:36:55,045 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:36:55,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:55,053 INFO L225 Difference]: With dead ends: 4296 [2022-01-18 05:36:55,053 INFO L226 Difference]: Without dead ends: 4286 [2022-01-18 05:36:55,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=301, Invalid=2779, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 05:36:55,053 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 192 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 740 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:55,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 259 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1489 Invalid, 0 Unknown, 740 Unchecked, 0.6s Time] [2022-01-18 05:36:55,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4286 states. [2022-01-18 05:36:55,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4286 to 2949. [2022-01-18 05:36:55,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2948 states have (on average 3.305291723202171) internal successors, (9744), 2948 states have internal predecessors, (9744), 0 states have call successors, (0), 0 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 05:36:55,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 9744 transitions. [2022-01-18 05:36:55,097 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 9744 transitions. Word has length 24 [2022-01-18 05:36:55,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:55,097 INFO L470 AbstractCegarLoop]: Abstraction has 2949 states and 9744 transitions. [2022-01-18 05:36:55,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:36:55,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 9744 transitions. [2022-01-18 05:36:55,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:36:55,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:55,101 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:36:55,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Ended with exit code 0 [2022-01-18 05:36:55,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:55,302 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:36:55,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:55,302 INFO L85 PathProgramCache]: Analyzing trace with hash 545643768, now seen corresponding path program 25 times [2022-01-18 05:36:55,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:55,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649780189] [2022-01-18 05:36:55,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:55,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:55,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:55,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:55,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649780189] [2022-01-18 05:36:55,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649780189] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:55,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030740348] [2022-01-18 05:36:55,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:36:55,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:55,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:55,483 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:36:55,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-01-18 05:36:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:55,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:36:55,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:55,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:55,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:55,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:55,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:55,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:36:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:55,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:56,028 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:36:56,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:36:56,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:56,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:56,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:56,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:56,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:36:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:56,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030740348] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:56,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:56,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:36:56,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063553990] [2022-01-18 05:36:56,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:56,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:36:56,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:56,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:36:56,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:36:56,082 INFO L87 Difference]: Start difference. First operand 2949 states and 9744 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:36:57,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:36:57,710 INFO L93 Difference]: Finished difference Result 3471 states and 11419 transitions. [2022-01-18 05:36:57,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 05:36:57,711 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:36:57,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:36:57,717 INFO L225 Difference]: With dead ends: 3471 [2022-01-18 05:36:57,717 INFO L226 Difference]: Without dead ends: 3465 [2022-01-18 05:36:57,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=298, Invalid=3008, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 05:36:57,717 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 171 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 2069 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 2764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 658 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:36:57,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 191 Invalid, 2764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2069 Invalid, 0 Unknown, 658 Unchecked, 0.8s Time] [2022-01-18 05:36:57,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3465 states. [2022-01-18 05:36:57,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3465 to 2959. [2022-01-18 05:36:57,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2959 states, 2958 states have (on average 3.3045977011494254) internal successors, (9775), 2958 states have internal predecessors, (9775), 0 states have call successors, (0), 0 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 05:36:57,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2959 states to 2959 states and 9775 transitions. [2022-01-18 05:36:57,757 INFO L78 Accepts]: Start accepts. Automaton has 2959 states and 9775 transitions. Word has length 24 [2022-01-18 05:36:57,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:36:57,757 INFO L470 AbstractCegarLoop]: Abstraction has 2959 states and 9775 transitions. [2022-01-18 05:36:57,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:36:57,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2959 states and 9775 transitions. [2022-01-18 05:36:57,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:36:57,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:36:57,761 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:36:57,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Ended with exit code 0 [2022-01-18 05:36:57,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:57,961 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:36:57,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:36:57,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1251307591, now seen corresponding path program 4 times [2022-01-18 05:36:57,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:36:57,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245305592] [2022-01-18 05:36:57,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:36:57,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:36:57,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:36:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:58,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:36:58,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245305592] [2022-01-18 05:36:58,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245305592] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:36:58,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262993512] [2022-01-18 05:36:58,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:36:58,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:36:58,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:36:58,144 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:36:58,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-01-18 05:36:58,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:36:58,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:36:58,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:36:58,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:36:58,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:58,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:58,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:58,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:58,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:36:58,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:58,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:36:58,700 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:36:58,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:36:58,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:58,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:36:58,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:58,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:36:58,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:36:58,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:36:58,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262993512] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:36:58,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:36:58,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:36:58,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563421632] [2022-01-18 05:36:58,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:36:58,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:36:58,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:36:58,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:36:58,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:36:58,754 INFO L87 Difference]: Start difference. First operand 2959 states and 9775 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:37:00,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:00,497 INFO L93 Difference]: Finished difference Result 3567 states and 11758 transitions. [2022-01-18 05:37:00,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 05:37:00,497 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:37:00,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:00,503 INFO L225 Difference]: With dead ends: 3567 [2022-01-18 05:37:00,503 INFO L226 Difference]: Without dead ends: 3561 [2022-01-18 05:37:00,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=297, Invalid=2895, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 05:37:00,504 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 139 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 2329 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 3114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 751 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:00,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 181 Invalid, 3114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2329 Invalid, 0 Unknown, 751 Unchecked, 0.8s Time] [2022-01-18 05:37:00,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2022-01-18 05:37:00,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2967. [2022-01-18 05:37:00,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2967 states, 2966 states have (on average 3.3031018206338505) internal successors, (9797), 2966 states have internal predecessors, (9797), 0 states have call successors, (0), 0 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 05:37:00,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 9797 transitions. [2022-01-18 05:37:00,543 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 9797 transitions. Word has length 24 [2022-01-18 05:37:00,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:00,543 INFO L470 AbstractCegarLoop]: Abstraction has 2967 states and 9797 transitions. [2022-01-18 05:37:00,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:37:00,543 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 9797 transitions. [2022-01-18 05:37:00,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:37:00,546 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:00,546 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:37:00,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Ended with exit code 0 [2022-01-18 05:37:00,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2022-01-18 05:37:00,747 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:37:00,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:00,747 INFO L85 PathProgramCache]: Analyzing trace with hash 123902901, now seen corresponding path program 5 times [2022-01-18 05:37:00,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:00,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207418306] [2022-01-18 05:37:00,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:00,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:00,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:00,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207418306] [2022-01-18 05:37:00,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207418306] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:00,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455740055] [2022-01-18 05:37:00,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:37:00,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:00,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:00,927 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:37:00,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-01-18 05:37:00,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:37:00,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:37:00,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:37:00,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:01,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:01,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:01,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:01,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:01,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:37:01,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:01,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:01,474 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:37:01,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:37:01,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:01,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:01,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:01,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:01,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:37:01,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:01,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455740055] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:01,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:01,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:37:01,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125038340] [2022-01-18 05:37:01,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:01,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:37:01,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:01,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:37:01,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:37:01,536 INFO L87 Difference]: Start difference. First operand 2967 states and 9797 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:37:02,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:02,608 INFO L93 Difference]: Finished difference Result 3430 states and 11290 transitions. [2022-01-18 05:37:02,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 05:37:02,608 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:37:02,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:02,614 INFO L225 Difference]: With dead ends: 3430 [2022-01-18 05:37:02,614 INFO L226 Difference]: Without dead ends: 3428 [2022-01-18 05:37:02,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=236, Invalid=2314, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 05:37:02,615 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 110 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 395 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:02,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 140 Invalid, 1634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1212 Invalid, 0 Unknown, 395 Unchecked, 0.4s Time] [2022-01-18 05:37:02,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3428 states. [2022-01-18 05:37:02,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3428 to 2966. [2022-01-18 05:37:02,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2966 states, 2965 states have (on average 3.303204047217538) internal successors, (9794), 2965 states have internal predecessors, (9794), 0 states have call successors, (0), 0 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 05:37:02,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2966 states to 2966 states and 9794 transitions. [2022-01-18 05:37:02,652 INFO L78 Accepts]: Start accepts. Automaton has 2966 states and 9794 transitions. Word has length 24 [2022-01-18 05:37:02,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:02,652 INFO L470 AbstractCegarLoop]: Abstraction has 2966 states and 9794 transitions. [2022-01-18 05:37:02,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:37:02,652 INFO L276 IsEmpty]: Start isEmpty. Operand 2966 states and 9794 transitions. [2022-01-18 05:37:02,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:37:02,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:02,656 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:37:02,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Forceful destruction successful, exit code 0 [2022-01-18 05:37:02,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2022-01-18 05:37:02,856 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:37:02,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:02,856 INFO L85 PathProgramCache]: Analyzing trace with hash 674726487, now seen corresponding path program 17 times [2022-01-18 05:37:02,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:02,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984037994] [2022-01-18 05:37:02,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:02,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:02,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:03,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:03,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:03,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984037994] [2022-01-18 05:37:03,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984037994] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:03,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753246945] [2022-01-18 05:37:03,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:37:03,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:03,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:03,045 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:37:03,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-01-18 05:37:03,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:37:03,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:37:03,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:37:03,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:03,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:03,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:03,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:03,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:03,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:37:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:03,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:03,591 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:37:03,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:37:03,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:03,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:03,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:03,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:03,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:37:03,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:03,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753246945] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:03,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:03,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:37:03,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884788552] [2022-01-18 05:37:03,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:03,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:37:03,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:03,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:37:03,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:37:03,653 INFO L87 Difference]: Start difference. First operand 2966 states and 9794 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:37:04,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:04,571 INFO L93 Difference]: Finished difference Result 3474 states and 11435 transitions. [2022-01-18 05:37:04,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 05:37:04,572 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:37:04,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:04,578 INFO L225 Difference]: With dead ends: 3474 [2022-01-18 05:37:04,578 INFO L226 Difference]: Without dead ends: 3468 [2022-01-18 05:37:04,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=173, Invalid=1633, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 05:37:04,578 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 116 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:04,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 187 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1348 Invalid, 0 Unknown, 269 Unchecked, 0.5s Time] [2022-01-18 05:37:04,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3468 states. [2022-01-18 05:37:04,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3468 to 2969. [2022-01-18 05:37:04,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2969 states, 2968 states have (on average 3.30222371967655) internal successors, (9801), 2968 states have internal predecessors, (9801), 0 states have call successors, (0), 0 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 05:37:04,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2969 states to 2969 states and 9801 transitions. [2022-01-18 05:37:04,619 INFO L78 Accepts]: Start accepts. Automaton has 2969 states and 9801 transitions. Word has length 24 [2022-01-18 05:37:04,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:04,635 INFO L470 AbstractCegarLoop]: Abstraction has 2969 states and 9801 transitions. [2022-01-18 05:37:04,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:37:04,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2969 states and 9801 transitions. [2022-01-18 05:37:04,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:37:04,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:04,639 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:37:04,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Ended with exit code 0 [2022-01-18 05:37:04,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-01-18 05:37:04,840 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:37:04,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:04,840 INFO L85 PathProgramCache]: Analyzing trace with hash -589719087, now seen corresponding path program 18 times [2022-01-18 05:37:04,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:04,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196437644] [2022-01-18 05:37:04,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:04,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:04,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:05,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:05,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196437644] [2022-01-18 05:37:05,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196437644] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:05,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471005298] [2022-01-18 05:37:05,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:37:05,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:05,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:05,018 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:37:05,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-01-18 05:37:05,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:37:05,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:37:05,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 05:37:05,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:05,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:05,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:05,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:37:05,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 49 [2022-01-18 05:37:05,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:05,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:06,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:06,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:06,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:06,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:06,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 7 [2022-01-18 05:37:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:06,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471005298] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:06,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:06,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-01-18 05:37:06,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155224308] [2022-01-18 05:37:06,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:06,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:37:06,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:06,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:37:06,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:37:06,466 INFO L87 Difference]: Start difference. First operand 2969 states and 9801 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:37:07,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:07,446 INFO L93 Difference]: Finished difference Result 3533 states and 11572 transitions. [2022-01-18 05:37:07,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 05:37:07,447 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:37:07,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:07,453 INFO L225 Difference]: With dead ends: 3533 [2022-01-18 05:37:07,453 INFO L226 Difference]: Without dead ends: 3523 [2022-01-18 05:37:07,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=232, Invalid=2218, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 05:37:07,453 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 130 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 508 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:07,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 252 Invalid, 1518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 996 Invalid, 0 Unknown, 508 Unchecked, 0.4s Time] [2022-01-18 05:37:07,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3523 states. [2022-01-18 05:37:07,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3523 to 2977. [2022-01-18 05:37:07,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2976 states have (on average 3.3010752688172045) internal successors, (9824), 2976 states have internal predecessors, (9824), 0 states have call successors, (0), 0 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 05:37:07,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 9824 transitions. [2022-01-18 05:37:07,493 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 9824 transitions. Word has length 24 [2022-01-18 05:37:07,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:07,493 INFO L470 AbstractCegarLoop]: Abstraction has 2977 states and 9824 transitions. [2022-01-18 05:37:07,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:37:07,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 9824 transitions. [2022-01-18 05:37:07,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:37:07,497 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:07,497 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:37:07,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Ended with exit code 0 [2022-01-18 05:37:07,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-01-18 05:37:07,697 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:37:07,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:07,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1122224872, now seen corresponding path program 6 times [2022-01-18 05:37:07,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:07,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753066216] [2022-01-18 05:37:07,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:07,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:07,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:07,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:07,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:07,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753066216] [2022-01-18 05:37:07,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753066216] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:07,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553111113] [2022-01-18 05:37:07,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:37:07,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:07,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:07,877 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:37:07,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-01-18 05:37:07,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:37:07,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:37:07,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:37:07,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:08,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:08,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:08,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:08,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:08,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:37:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:08,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:08,418 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:37:08,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:37:08,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:08,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:08,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:08,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:08,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:37:08,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:08,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553111113] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:08,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:08,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:37:08,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371979214] [2022-01-18 05:37:08,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:08,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:37:08,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:08,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:37:08,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:37:08,481 INFO L87 Difference]: Start difference. First operand 2977 states and 9824 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:37:09,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:09,934 INFO L93 Difference]: Finished difference Result 3598 states and 11823 transitions. [2022-01-18 05:37:09,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 05:37:09,934 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:37:09,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:09,941 INFO L225 Difference]: With dead ends: 3598 [2022-01-18 05:37:09,941 INFO L226 Difference]: Without dead ends: 3592 [2022-01-18 05:37:09,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=257, Invalid=2395, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 05:37:09,941 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 210 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1819 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 615 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:09,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 148 Invalid, 2473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1819 Invalid, 0 Unknown, 615 Unchecked, 0.7s Time] [2022-01-18 05:37:09,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3592 states. [2022-01-18 05:37:09,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3592 to 2970. [2022-01-18 05:37:09,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 3.303469181542607) internal successors, (9808), 2969 states have internal predecessors, (9808), 0 states have call successors, (0), 0 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 05:37:09,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 9808 transitions. [2022-01-18 05:37:09,987 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 9808 transitions. Word has length 24 [2022-01-18 05:37:09,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:09,987 INFO L470 AbstractCegarLoop]: Abstraction has 2970 states and 9808 transitions. [2022-01-18 05:37:09,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:37:09,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 9808 transitions. [2022-01-18 05:37:09,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:37:09,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:09,992 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:37:10,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Ended with exit code 0 [2022-01-18 05:37:10,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2022-01-18 05:37:10,192 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:37:10,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:10,192 INFO L85 PathProgramCache]: Analyzing trace with hash -57853730, now seen corresponding path program 26 times [2022-01-18 05:37:10,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:10,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114515547] [2022-01-18 05:37:10,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:10,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:10,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:10,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:10,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:10,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114515547] [2022-01-18 05:37:10,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114515547] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:10,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365859364] [2022-01-18 05:37:10,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:37:10,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:10,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:10,374 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:37:10,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-01-18 05:37:10,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:37:10,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:37:10,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:37:10,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:10,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:10,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:10,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:10,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:37:10,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2022-01-18 05:37:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:10,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:11,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:11,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:11,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:11,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:11,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2022-01-18 05:37:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:11,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365859364] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:11,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:11,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-01-18 05:37:11,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054334677] [2022-01-18 05:37:11,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:11,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:37:11,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:11,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:37:11,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:37:11,324 INFO L87 Difference]: Start difference. First operand 2970 states and 9808 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:37:13,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:13,468 INFO L93 Difference]: Finished difference Result 4051 states and 13632 transitions. [2022-01-18 05:37:13,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 05:37:13,469 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:37:13,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:13,476 INFO L225 Difference]: With dead ends: 4051 [2022-01-18 05:37:13,476 INFO L226 Difference]: Without dead ends: 4039 [2022-01-18 05:37:13,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=509, Invalid=5041, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 05:37:13,477 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 263 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 3000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1510 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:13,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 193 Invalid, 3000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1403 Invalid, 0 Unknown, 1510 Unchecked, 0.6s Time] [2022-01-18 05:37:13,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4039 states. [2022-01-18 05:37:13,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4039 to 2993. [2022-01-18 05:37:13,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2993 states, 2992 states have (on average 3.304812834224599) internal successors, (9888), 2992 states have internal predecessors, (9888), 0 states have call successors, (0), 0 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 05:37:13,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 9888 transitions. [2022-01-18 05:37:13,520 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 9888 transitions. Word has length 24 [2022-01-18 05:37:13,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:13,520 INFO L470 AbstractCegarLoop]: Abstraction has 2993 states and 9888 transitions. [2022-01-18 05:37:13,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:37:13,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 9888 transitions. [2022-01-18 05:37:13,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:37:13,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:13,524 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:37:13,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Ended with exit code 0 [2022-01-18 05:37:13,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:13,724 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:37:13,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:13,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1713164960, now seen corresponding path program 27 times [2022-01-18 05:37:13,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:13,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551438096] [2022-01-18 05:37:13,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:13,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:13,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:13,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:13,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551438096] [2022-01-18 05:37:13,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551438096] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:13,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225741317] [2022-01-18 05:37:13,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:37:13,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:13,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:13,907 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:37:13,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-01-18 05:37:13,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:37:13,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:37:13,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:37:13,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:14,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:14,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:14,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:14,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:14,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 05:37:14,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:14,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:14,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:14,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:37:14,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-01-18 05:37:14,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:14,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225741317] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:14,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:14,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:37:14,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275361290] [2022-01-18 05:37:14,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:14,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:37:14,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:14,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:37:14,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:37:14,756 INFO L87 Difference]: Start difference. First operand 2993 states and 9888 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:37:16,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:16,040 INFO L93 Difference]: Finished difference Result 3720 states and 12312 transitions. [2022-01-18 05:37:16,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 05:37:16,040 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:37:16,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:16,047 INFO L225 Difference]: With dead ends: 3720 [2022-01-18 05:37:16,047 INFO L226 Difference]: Without dead ends: 3714 [2022-01-18 05:37:16,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=309, Invalid=2553, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 05:37:16,048 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 158 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 411 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:16,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 139 Invalid, 1741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1266 Invalid, 0 Unknown, 411 Unchecked, 0.5s Time] [2022-01-18 05:37:16,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3714 states. [2022-01-18 05:37:16,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3714 to 3006. [2022-01-18 05:37:16,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3006 states, 3005 states have (on average 3.304159733777038) internal successors, (9929), 3005 states have internal predecessors, (9929), 0 states have call successors, (0), 0 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 05:37:16,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3006 states to 3006 states and 9929 transitions. [2022-01-18 05:37:16,091 INFO L78 Accepts]: Start accepts. Automaton has 3006 states and 9929 transitions. Word has length 24 [2022-01-18 05:37:16,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:16,091 INFO L470 AbstractCegarLoop]: Abstraction has 3006 states and 9929 transitions. [2022-01-18 05:37:16,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:37:16,091 INFO L276 IsEmpty]: Start isEmpty. Operand 3006 states and 9929 transitions. [2022-01-18 05:37:16,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:37:16,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:16,095 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:37:16,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Ended with exit code 0 [2022-01-18 05:37:16,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2022-01-18 05:37:16,295 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:37:16,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:16,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1968870974, now seen corresponding path program 28 times [2022-01-18 05:37:16,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:16,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585161720] [2022-01-18 05:37:16,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:16,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:16,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:16,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585161720] [2022-01-18 05:37:16,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585161720] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:16,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612684456] [2022-01-18 05:37:16,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:37:16,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:16,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:16,477 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:37:16,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-01-18 05:37:16,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:37:16,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:37:16,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:37:16,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:16,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:16,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:16,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:16,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:16,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:37:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:16,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:17,062 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:37:17,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:37:17,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:17,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:17,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:17,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:17,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:37:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:17,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612684456] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:17,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:17,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:37:17,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993578485] [2022-01-18 05:37:17,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:17,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:37:17,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:17,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:37:17,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:37:17,117 INFO L87 Difference]: Start difference. First operand 3006 states and 9929 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:37:18,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:18,530 INFO L93 Difference]: Finished difference Result 3727 states and 12338 transitions. [2022-01-18 05:37:18,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 05:37:18,530 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:37:18,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:18,537 INFO L225 Difference]: With dead ends: 3727 [2022-01-18 05:37:18,537 INFO L226 Difference]: Without dead ends: 3721 [2022-01-18 05:37:18,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=300, Invalid=2456, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 05:37:18,538 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 149 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1719 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 2159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:18,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 213 Invalid, 2159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1719 Invalid, 0 Unknown, 393 Unchecked, 0.7s Time] [2022-01-18 05:37:18,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2022-01-18 05:37:18,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 2999. [2022-01-18 05:37:18,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2998 states have (on average 3.304202801867912) internal successors, (9906), 2998 states have internal predecessors, (9906), 0 states have call successors, (0), 0 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 05:37:18,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 9906 transitions. [2022-01-18 05:37:18,580 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 9906 transitions. Word has length 24 [2022-01-18 05:37:18,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:18,580 INFO L470 AbstractCegarLoop]: Abstraction has 2999 states and 9906 transitions. [2022-01-18 05:37:18,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:37:18,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 9906 transitions. [2022-01-18 05:37:18,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:37:18,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:18,584 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:37:18,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Ended with exit code 0 [2022-01-18 05:37:18,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2022-01-18 05:37:18,785 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:37:18,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:18,785 INFO L85 PathProgramCache]: Analyzing trace with hash 161416511, now seen corresponding path program 6 times [2022-01-18 05:37:18,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:18,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110544937] [2022-01-18 05:37:18,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:18,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:18,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:18,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110544937] [2022-01-18 05:37:18,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110544937] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:18,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629334150] [2022-01-18 05:37:18,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:37:18,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:18,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:18,968 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:37:18,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-01-18 05:37:18,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:37:18,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:37:18,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:37:18,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:19,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:19,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:19,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:19,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:37:19,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2022-01-18 05:37:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:19,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:19,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:19,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:19,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:19,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:19,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2022-01-18 05:37:19,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:19,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629334150] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:19,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:19,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-01-18 05:37:19,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858858725] [2022-01-18 05:37:19,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:19,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:37:19,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:19,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:37:19,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:37:19,910 INFO L87 Difference]: Start difference. First operand 2999 states and 9906 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:37:23,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:23,277 INFO L93 Difference]: Finished difference Result 4885 states and 16541 transitions. [2022-01-18 05:37:23,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-18 05:37:23,277 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:37:23,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:23,286 INFO L225 Difference]: With dead ends: 4885 [2022-01-18 05:37:23,286 INFO L226 Difference]: Without dead ends: 4875 [2022-01-18 05:37:23,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2510 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=803, Invalid=7753, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 05:37:23,286 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 249 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 1727 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 3011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1180 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:23,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 223 Invalid, 3011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1727 Invalid, 0 Unknown, 1180 Unchecked, 0.8s Time] [2022-01-18 05:37:23,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-01-18 05:37:23,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 3029. [2022-01-18 05:37:23,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 3028 states have (on average 3.3051519154557463) internal successors, (10008), 3028 states have internal predecessors, (10008), 0 states have call successors, (0), 0 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 05:37:23,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 10008 transitions. [2022-01-18 05:37:23,335 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 10008 transitions. Word has length 24 [2022-01-18 05:37:23,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:23,335 INFO L470 AbstractCegarLoop]: Abstraction has 3029 states and 10008 transitions. [2022-01-18 05:37:23,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:37:23,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 10008 transitions. [2022-01-18 05:37:23,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:37:23,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:23,339 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:37:23,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Forceful destruction successful, exit code 0 [2022-01-18 05:37:23,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:23,539 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:37:23,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:23,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1854805089, now seen corresponding path program 19 times [2022-01-18 05:37:23,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:23,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107051671] [2022-01-18 05:37:23,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:23,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:23,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:23,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107051671] [2022-01-18 05:37:23,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107051671] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:23,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945649904] [2022-01-18 05:37:23,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:37:23,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:23,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:23,719 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:37:23,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-01-18 05:37:23,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:23,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:37:23,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:23,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:23,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:23,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:23,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:23,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:37:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:24,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:24,234 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:37:24,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:37:24,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:24,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:24,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:24,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:24,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:37:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:24,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945649904] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:24,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:24,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:37:24,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277675236] [2022-01-18 05:37:24,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:24,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:37:24,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:24,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:37:24,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:37:24,290 INFO L87 Difference]: Start difference. First operand 3029 states and 10008 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:37:25,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:25,724 INFO L93 Difference]: Finished difference Result 4651 states and 15957 transitions. [2022-01-18 05:37:25,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 05:37:25,724 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:37:25,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:25,733 INFO L225 Difference]: With dead ends: 4651 [2022-01-18 05:37:25,733 INFO L226 Difference]: Without dead ends: 4645 [2022-01-18 05:37:25,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=312, Invalid=2444, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 05:37:25,733 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 203 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 1838 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 969 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:25,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 177 Invalid, 2869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1838 Invalid, 0 Unknown, 969 Unchecked, 0.7s Time] [2022-01-18 05:37:25,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4645 states. [2022-01-18 05:37:25,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4645 to 3043. [2022-01-18 05:37:25,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 3042 states have (on average 3.304733727810651) internal successors, (10053), 3042 states have internal predecessors, (10053), 0 states have call successors, (0), 0 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 05:37:25,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 10053 transitions. [2022-01-18 05:37:25,782 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 10053 transitions. Word has length 24 [2022-01-18 05:37:25,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:25,782 INFO L470 AbstractCegarLoop]: Abstraction has 3043 states and 10053 transitions. [2022-01-18 05:37:25,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:37:25,782 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 10053 transitions. [2022-01-18 05:37:25,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:37:25,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:25,786 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:37:25,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Ended with exit code 0 [2022-01-18 05:37:25,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:25,986 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:37:25,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:25,986 INFO L85 PathProgramCache]: Analyzing trace with hash 588337472, now seen corresponding path program 7 times [2022-01-18 05:37:25,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:25,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71213521] [2022-01-18 05:37:25,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:25,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:25,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:26,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:26,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71213521] [2022-01-18 05:37:26,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71213521] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:26,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060302169] [2022-01-18 05:37:26,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:37:26,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:26,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:26,166 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:37:26,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-01-18 05:37:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:26,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:37:26,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:26,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:26,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:26,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:26,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:26,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:37:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:26,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:26,681 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:37:26,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:37:26,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:26,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:26,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:26,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:26,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:37:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:26,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060302169] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:26,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:26,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:37:26,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992604890] [2022-01-18 05:37:26,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:26,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:37:26,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:26,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:37:26,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:37:26,745 INFO L87 Difference]: Start difference. First operand 3043 states and 10053 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:37:28,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:28,712 INFO L93 Difference]: Finished difference Result 4373 states and 14911 transitions. [2022-01-18 05:37:28,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 05:37:28,713 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:37:28,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:28,721 INFO L225 Difference]: With dead ends: 4373 [2022-01-18 05:37:28,721 INFO L226 Difference]: Without dead ends: 4371 [2022-01-18 05:37:28,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=474, Invalid=3948, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 05:37:28,721 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 183 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 1731 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 2491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 672 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:28,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 207 Invalid, 2491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1731 Invalid, 0 Unknown, 672 Unchecked, 0.7s Time] [2022-01-18 05:37:28,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2022-01-18 05:37:28,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 3056. [2022-01-18 05:37:28,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3056 states, 3055 states have (on average 3.3037643207855973) internal successors, (10093), 3055 states have internal predecessors, (10093), 0 states have call successors, (0), 0 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 05:37:28,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3056 states to 3056 states and 10093 transitions. [2022-01-18 05:37:28,768 INFO L78 Accepts]: Start accepts. Automaton has 3056 states and 10093 transitions. Word has length 24 [2022-01-18 05:37:28,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:28,768 INFO L470 AbstractCegarLoop]: Abstraction has 3056 states and 10093 transitions. [2022-01-18 05:37:28,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:37:28,768 INFO L276 IsEmpty]: Start isEmpty. Operand 3056 states and 10093 transitions. [2022-01-18 05:37:28,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:37:28,772 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:28,772 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:37:28,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Forceful destruction successful, exit code 0 [2022-01-18 05:37:28,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:28,972 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:37:28,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:28,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1982548168, now seen corresponding path program 29 times [2022-01-18 05:37:28,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:28,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621484021] [2022-01-18 05:37:28,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:28,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:28,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:29,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:29,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621484021] [2022-01-18 05:37:29,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621484021] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:29,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599255406] [2022-01-18 05:37:29,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:37:29,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:29,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:29,163 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:37:29,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-01-18 05:37:29,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:37:29,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:37:29,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:37:29,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:29,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:29,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:29,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:29,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:29,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:37:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:29,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:29,677 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:37:29,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:37:29,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:29,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:29,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:29,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:29,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:37:29,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:29,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599255406] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:29,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:29,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:37:29,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410239003] [2022-01-18 05:37:29,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:29,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:37:29,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:29,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:37:29,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:37:29,741 INFO L87 Difference]: Start difference. First operand 3056 states and 10093 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:37:31,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:31,430 INFO L93 Difference]: Finished difference Result 4072 states and 13690 transitions. [2022-01-18 05:37:31,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 05:37:31,430 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:37:31,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:31,438 INFO L225 Difference]: With dead ends: 4072 [2022-01-18 05:37:31,438 INFO L226 Difference]: Without dead ends: 4066 [2022-01-18 05:37:31,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=378, Invalid=2928, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 05:37:31,439 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 157 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 1686 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 2281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 527 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:31,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 167 Invalid, 2281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1686 Invalid, 0 Unknown, 527 Unchecked, 0.7s Time] [2022-01-18 05:37:31,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4066 states. [2022-01-18 05:37:31,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4066 to 3081. [2022-01-18 05:37:31,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3081 states, 3080 states have (on average 3.301948051948052) internal successors, (10170), 3080 states have internal predecessors, (10170), 0 states have call successors, (0), 0 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 05:37:31,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 10170 transitions. [2022-01-18 05:37:31,486 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 10170 transitions. Word has length 24 [2022-01-18 05:37:31,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:31,486 INFO L470 AbstractCegarLoop]: Abstraction has 3081 states and 10170 transitions. [2022-01-18 05:37:31,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:37:31,486 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 10170 transitions. [2022-01-18 05:37:31,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:37:31,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:31,490 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:37:31,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Ended with exit code 0 [2022-01-18 05:37:31,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:31,691 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:37:31,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:31,691 INFO L85 PathProgramCache]: Analyzing trace with hash 2115905623, now seen corresponding path program 20 times [2022-01-18 05:37:31,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:31,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391381608] [2022-01-18 05:37:31,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:31,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:31,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:31,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391381608] [2022-01-18 05:37:31,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391381608] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:31,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839297315] [2022-01-18 05:37:31,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:37:31,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:31,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:31,873 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:37:31,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-01-18 05:37:31,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:37:31,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:37:31,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:37:31,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:32,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:32,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:32,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:32,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:32,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2022-01-18 05:37:32,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:32,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:32,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:32,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:32,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:32,675 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:37:32,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 52 [2022-01-18 05:37:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:32,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839297315] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:32,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:32,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-18 05:37:32,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913639242] [2022-01-18 05:37:32,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:32,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:37:32,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:32,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:37:32,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:37:32,757 INFO L87 Difference]: Start difference. First operand 3081 states and 10170 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:37:35,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:35,552 INFO L93 Difference]: Finished difference Result 3823 states and 12504 transitions. [2022-01-18 05:37:35,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 05:37:35,552 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:37:35,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:35,559 INFO L225 Difference]: With dead ends: 3823 [2022-01-18 05:37:35,559 INFO L226 Difference]: Without dead ends: 3811 [2022-01-18 05:37:35,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=636, Invalid=5844, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 05:37:35,559 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 196 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 1904 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 2717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 755 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:35,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 289 Invalid, 2717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1904 Invalid, 0 Unknown, 755 Unchecked, 0.8s Time] [2022-01-18 05:37:35,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3811 states. [2022-01-18 05:37:35,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3811 to 3149. [2022-01-18 05:37:35,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3149 states, 3148 states have (on average 3.3049555273189326) internal successors, (10404), 3148 states have internal predecessors, (10404), 0 states have call successors, (0), 0 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 05:37:35,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3149 states to 3149 states and 10404 transitions. [2022-01-18 05:37:35,603 INFO L78 Accepts]: Start accepts. Automaton has 3149 states and 10404 transitions. Word has length 24 [2022-01-18 05:37:35,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:35,603 INFO L470 AbstractCegarLoop]: Abstraction has 3149 states and 10404 transitions. [2022-01-18 05:37:35,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:37:35,604 INFO L276 IsEmpty]: Start isEmpty. Operand 3149 states and 10404 transitions. [2022-01-18 05:37:35,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:37:35,608 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:35,608 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:37:35,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Ended with exit code 0 [2022-01-18 05:37:35,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2022-01-18 05:37:35,808 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:37:35,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:35,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2007880862, now seen corresponding path program 30 times [2022-01-18 05:37:35,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:35,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125714169] [2022-01-18 05:37:35,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:35,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:35,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:35,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125714169] [2022-01-18 05:37:35,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125714169] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:35,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119048150] [2022-01-18 05:37:35,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:37:35,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:35,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:35,988 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:37:35,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-01-18 05:37:36,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:37:36,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:37:36,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:37:36,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:36,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:36,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:36,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:36,281 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:37:36,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 51 [2022-01-18 05:37:36,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:36,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:36,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:36,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:36,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:36,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:36,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2022-01-18 05:37:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:36,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119048150] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:36,934 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:36,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-01-18 05:37:36,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935896878] [2022-01-18 05:37:36,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:36,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:37:36,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:36,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:37:36,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:37:36,935 INFO L87 Difference]: Start difference. First operand 3149 states and 10404 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:38,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:38,638 INFO L93 Difference]: Finished difference Result 3789 states and 12551 transitions. [2022-01-18 05:37:38,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 05:37:38,639 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:37:38,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:38,646 INFO L225 Difference]: With dead ends: 3789 [2022-01-18 05:37:38,646 INFO L226 Difference]: Without dead ends: 3778 [2022-01-18 05:37:38,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=369, Invalid=3537, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 05:37:38,646 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 158 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 2495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1126 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:38,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 127 Invalid, 2495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1323 Invalid, 0 Unknown, 1126 Unchecked, 0.5s Time] [2022-01-18 05:37:38,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3778 states. [2022-01-18 05:37:38,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3778 to 3166. [2022-01-18 05:37:38,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3166 states, 3165 states have (on average 3.3048973143759874) internal successors, (10460), 3165 states have internal predecessors, (10460), 0 states have call successors, (0), 0 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 05:37:38,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3166 states to 3166 states and 10460 transitions. [2022-01-18 05:37:38,689 INFO L78 Accepts]: Start accepts. Automaton has 3166 states and 10460 transitions. Word has length 24 [2022-01-18 05:37:38,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:38,689 INFO L470 AbstractCegarLoop]: Abstraction has 3166 states and 10460 transitions. [2022-01-18 05:37:38,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:38,689 INFO L276 IsEmpty]: Start isEmpty. Operand 3166 states and 10460 transitions. [2022-01-18 05:37:38,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:37:38,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:38,693 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:37:38,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Ended with exit code 0 [2022-01-18 05:37:38,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:38,893 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:37:38,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:38,894 INFO L85 PathProgramCache]: Analyzing trace with hash 200426399, now seen corresponding path program 21 times [2022-01-18 05:37:38,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:38,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704478199] [2022-01-18 05:37:38,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:38,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:38,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:39,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:39,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:39,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704478199] [2022-01-18 05:37:39,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704478199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:39,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959075777] [2022-01-18 05:37:39,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:37:39,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:39,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:39,075 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:37:39,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-01-18 05:37:39,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:37:39,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:37:39,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:37:39,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:39,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:39,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:39,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:39,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:39,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 05:37:39,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:39,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:39,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:39,803 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:37:39,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-01-18 05:37:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:39,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959075777] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:39,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:39,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-01-18 05:37:39,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611494341] [2022-01-18 05:37:39,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:39,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:37:39,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:39,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:37:39,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:37:39,893 INFO L87 Difference]: Start difference. First operand 3166 states and 10460 transitions. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:41,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:41,195 INFO L93 Difference]: Finished difference Result 4005 states and 13426 transitions. [2022-01-18 05:37:41,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 05:37:41,195 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:37:41,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:41,203 INFO L225 Difference]: With dead ends: 4005 [2022-01-18 05:37:41,203 INFO L226 Difference]: Without dead ends: 3999 [2022-01-18 05:37:41,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=301, Invalid=3005, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 05:37:41,203 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 117 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1399 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 2588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1166 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:41,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 158 Invalid, 2588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1399 Invalid, 0 Unknown, 1166 Unchecked, 0.5s Time] [2022-01-18 05:37:41,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3999 states. [2022-01-18 05:37:41,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3999 to 3180. [2022-01-18 05:37:41,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3180 states, 3179 states have (on average 3.304812834224599) internal successors, (10506), 3179 states have internal predecessors, (10506), 0 states have call successors, (0), 0 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 05:37:41,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3180 states to 3180 states and 10506 transitions. [2022-01-18 05:37:41,249 INFO L78 Accepts]: Start accepts. Automaton has 3180 states and 10506 transitions. Word has length 24 [2022-01-18 05:37:41,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:41,249 INFO L470 AbstractCegarLoop]: Abstraction has 3180 states and 10506 transitions. [2022-01-18 05:37:41,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:41,249 INFO L276 IsEmpty]: Start isEmpty. Operand 3180 states and 10506 transitions. [2022-01-18 05:37:41,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:37:41,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:41,253 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:37:41,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Ended with exit code 0 [2022-01-18 05:37:41,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2022-01-18 05:37:41,454 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:37:41,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:41,454 INFO L85 PathProgramCache]: Analyzing trace with hash -510320264, now seen corresponding path program 31 times [2022-01-18 05:37:41,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:41,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72908468] [2022-01-18 05:37:41,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:41,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:41,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:41,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:41,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72908468] [2022-01-18 05:37:41,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72908468] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:41,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861655106] [2022-01-18 05:37:41,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:37:41,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:41,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:41,634 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:37:41,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-01-18 05:37:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:41,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:37:41,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:41,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:41,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:41,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:41,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:41,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:37:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:41,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:42,148 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:37:42,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:37:42,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:42,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:42,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:42,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:42,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:37:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:42,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861655106] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:42,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:42,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:37:42,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427593265] [2022-01-18 05:37:42,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:42,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:37:42,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:42,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:37:42,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:37:42,203 INFO L87 Difference]: Start difference. First operand 3180 states and 10506 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:43,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:43,749 INFO L93 Difference]: Finished difference Result 3860 states and 12801 transitions. [2022-01-18 05:37:43,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 05:37:43,750 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:37:43,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:43,757 INFO L225 Difference]: With dead ends: 3860 [2022-01-18 05:37:43,757 INFO L226 Difference]: Without dead ends: 3848 [2022-01-18 05:37:43,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=272, Invalid=2590, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 05:37:43,757 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 148 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 1945 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 2417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 432 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:43,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 86 Invalid, 2417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1945 Invalid, 0 Unknown, 432 Unchecked, 0.7s Time] [2022-01-18 05:37:43,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3848 states. [2022-01-18 05:37:43,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3848 to 3222. [2022-01-18 05:37:43,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3222 states, 3221 states have (on average 3.3042533374728347) internal successors, (10643), 3221 states have internal predecessors, (10643), 0 states have call successors, (0), 0 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 05:37:43,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3222 states to 3222 states and 10643 transitions. [2022-01-18 05:37:43,801 INFO L78 Accepts]: Start accepts. Automaton has 3222 states and 10643 transitions. Word has length 24 [2022-01-18 05:37:43,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:43,801 INFO L470 AbstractCegarLoop]: Abstraction has 3222 states and 10643 transitions. [2022-01-18 05:37:43,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:43,801 INFO L276 IsEmpty]: Start isEmpty. Operand 3222 states and 10643 transitions. [2022-01-18 05:37:43,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:37:43,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:43,805 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:37:43,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Ended with exit code 0 [2022-01-18 05:37:44,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2022-01-18 05:37:44,007 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:37:44,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:44,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1232490071, now seen corresponding path program 22 times [2022-01-18 05:37:44,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:44,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459511889] [2022-01-18 05:37:44,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:44,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:44,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:44,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459511889] [2022-01-18 05:37:44,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459511889] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:44,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072123987] [2022-01-18 05:37:44,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:37:44,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:44,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:44,189 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:37:44,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-01-18 05:37:44,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:37:44,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:37:44,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:37:44,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:44,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:44,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:44,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:44,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:44,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:37:44,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:44,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:44,715 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:37:44,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:37:44,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:44,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:44,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:44,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:44,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:37:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:44,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072123987] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:44,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:44,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:37:44,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895212379] [2022-01-18 05:37:44,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:44,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:37:44,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:44,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:37:44,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:37:44,782 INFO L87 Difference]: Start difference. First operand 3222 states and 10643 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:46,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:46,215 INFO L93 Difference]: Finished difference Result 3784 states and 12489 transitions. [2022-01-18 05:37:46,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 05:37:46,215 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:37:46,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:46,222 INFO L225 Difference]: With dead ends: 3784 [2022-01-18 05:37:46,222 INFO L226 Difference]: Without dead ends: 3769 [2022-01-18 05:37:46,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=248, Invalid=2302, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 05:37:46,223 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 123 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1895 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 2582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 658 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:46,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 91 Invalid, 2582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1895 Invalid, 0 Unknown, 658 Unchecked, 0.7s Time] [2022-01-18 05:37:46,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3769 states. [2022-01-18 05:37:46,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3769 to 3224. [2022-01-18 05:37:46,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3224 states, 3223 states have (on average 3.3012721067328576) internal successors, (10640), 3223 states have internal predecessors, (10640), 0 states have call successors, (0), 0 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 05:37:46,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3224 states to 3224 states and 10640 transitions. [2022-01-18 05:37:46,268 INFO L78 Accepts]: Start accepts. Automaton has 3224 states and 10640 transitions. Word has length 24 [2022-01-18 05:37:46,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:46,268 INFO L470 AbstractCegarLoop]: Abstraction has 3224 states and 10640 transitions. [2022-01-18 05:37:46,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:37:46,268 INFO L276 IsEmpty]: Start isEmpty. Operand 3224 states and 10640 transitions. [2022-01-18 05:37:46,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:37:46,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:46,273 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:37:46,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Ended with exit code 0 [2022-01-18 05:37:46,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2022-01-18 05:37:46,473 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:37:46,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:46,473 INFO L85 PathProgramCache]: Analyzing trace with hash -2063031644, now seen corresponding path program 32 times [2022-01-18 05:37:46,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:46,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071494767] [2022-01-18 05:37:46,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:46,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:46,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:46,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:46,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071494767] [2022-01-18 05:37:46,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071494767] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:46,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789237429] [2022-01-18 05:37:46,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:37:46,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:46,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:46,662 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:37:46,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-01-18 05:37:46,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:37:46,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:37:46,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:37:46,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:47,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:47,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:47,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:47,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:47,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 05:37:47,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:47,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:47,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:47,555 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:37:47,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-01-18 05:37:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:47,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789237429] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:47,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:47,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-01-18 05:37:47,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663670220] [2022-01-18 05:37:47,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:47,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:37:47,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:47,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:37:47,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:37:47,635 INFO L87 Difference]: Start difference. First operand 3224 states and 10640 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:37:49,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:49,791 INFO L93 Difference]: Finished difference Result 4392 states and 14519 transitions. [2022-01-18 05:37:49,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 05:37:49,791 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:37:49,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:49,799 INFO L225 Difference]: With dead ends: 4392 [2022-01-18 05:37:49,800 INFO L226 Difference]: Without dead ends: 4375 [2022-01-18 05:37:49,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=431, Invalid=3859, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 05:37:49,800 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 188 mSDsluCounter, 1734 mSDsCounter, 0 mSdLazyCounter, 2874 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 4123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 2874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1197 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:49,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 373 Invalid, 4123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 2874 Invalid, 0 Unknown, 1197 Unchecked, 1.1s Time] [2022-01-18 05:37:49,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4375 states. [2022-01-18 05:37:49,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4375 to 3233. [2022-01-18 05:37:49,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3233 states, 3232 states have (on average 3.2991955445544554) internal successors, (10663), 3232 states have internal predecessors, (10663), 0 states have call successors, (0), 0 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 05:37:49,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3233 states to 3233 states and 10663 transitions. [2022-01-18 05:37:49,851 INFO L78 Accepts]: Start accepts. Automaton has 3233 states and 10663 transitions. Word has length 24 [2022-01-18 05:37:49,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:49,851 INFO L470 AbstractCegarLoop]: Abstraction has 3233 states and 10663 transitions. [2022-01-18 05:37:49,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:37:49,851 INFO L276 IsEmpty]: Start isEmpty. Operand 3233 states and 10663 transitions. [2022-01-18 05:37:49,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:37:49,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:49,855 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:37:49,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Ended with exit code 0 [2022-01-18 05:37:50,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2022-01-18 05:37:50,056 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:37:50,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:50,056 INFO L85 PathProgramCache]: Analyzing trace with hash -48129382, now seen corresponding path program 8 times [2022-01-18 05:37:50,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:50,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269570431] [2022-01-18 05:37:50,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:50,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:50,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:50,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:50,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269570431] [2022-01-18 05:37:50,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269570431] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:50,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854323009] [2022-01-18 05:37:50,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:37:50,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:50,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:50,244 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:37:50,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-01-18 05:37:50,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:37:50,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:37:50,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:37:50,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:50,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:50,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:50,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:50,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:37:50,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2022-01-18 05:37:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:50,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:51,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:51,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:51,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:51,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:51,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2022-01-18 05:37:51,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:51,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854323009] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:51,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:51,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-01-18 05:37:51,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390519168] [2022-01-18 05:37:51,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:51,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:37:51,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:51,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:37:51,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:37:51,219 INFO L87 Difference]: Start difference. First operand 3233 states and 10663 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:37:54,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:54,490 INFO L93 Difference]: Finished difference Result 5020 states and 17012 transitions. [2022-01-18 05:37:54,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-18 05:37:54,491 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:37:54,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:54,500 INFO L225 Difference]: With dead ends: 5020 [2022-01-18 05:37:54,500 INFO L226 Difference]: Without dead ends: 5014 [2022-01-18 05:37:54,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2269 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=751, Invalid=7621, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 05:37:54,501 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 234 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 1733 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 3196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1352 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:54,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 223 Invalid, 3196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1733 Invalid, 0 Unknown, 1352 Unchecked, 0.7s Time] [2022-01-18 05:37:54,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5014 states. [2022-01-18 05:37:54,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5014 to 3227. [2022-01-18 05:37:54,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3227 states, 3226 states have (on average 3.300061996280223) internal successors, (10646), 3226 states have internal predecessors, (10646), 0 states have call successors, (0), 0 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 05:37:54,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3227 states to 3227 states and 10646 transitions. [2022-01-18 05:37:54,556 INFO L78 Accepts]: Start accepts. Automaton has 3227 states and 10646 transitions. Word has length 24 [2022-01-18 05:37:54,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:54,556 INFO L470 AbstractCegarLoop]: Abstraction has 3227 states and 10646 transitions. [2022-01-18 05:37:54,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:37:54,556 INFO L276 IsEmpty]: Start isEmpty. Operand 3227 states and 10646 transitions. [2022-01-18 05:37:54,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:37:54,560 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:54,560 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:37:54,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Forceful destruction successful, exit code 0 [2022-01-18 05:37:54,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:54,761 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:37:54,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:54,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1675952274, now seen corresponding path program 33 times [2022-01-18 05:37:54,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:54,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520491560] [2022-01-18 05:37:54,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:54,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:54,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:54,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:54,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:54,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520491560] [2022-01-18 05:37:54,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520491560] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:54,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462783636] [2022-01-18 05:37:54,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:37:54,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:54,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:54,949 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:37:54,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-01-18 05:37:54,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:37:54,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:37:54,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:37:54,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:55,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:55,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:55,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:55,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:55,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 05:37:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:55,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:55,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:55,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:37:55,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-01-18 05:37:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:55,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462783636] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:55,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:55,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:37:55,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971699946] [2022-01-18 05:37:55,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:55,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:37:55,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:55,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:37:55,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:37:55,830 INFO L87 Difference]: Start difference. First operand 3227 states and 10646 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:37:57,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:37:57,581 INFO L93 Difference]: Finished difference Result 4788 states and 16182 transitions. [2022-01-18 05:37:57,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 05:37:57,581 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:37:57,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:37:57,590 INFO L225 Difference]: With dead ends: 4788 [2022-01-18 05:37:57,590 INFO L226 Difference]: Without dead ends: 4782 [2022-01-18 05:37:57,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 30 SyntacticMatches, 9 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=356, Invalid=2950, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 05:37:57,591 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 196 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 1826 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 872 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:37:57,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 174 Invalid, 2752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1826 Invalid, 0 Unknown, 872 Unchecked, 0.7s Time] [2022-01-18 05:37:57,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4782 states. [2022-01-18 05:37:57,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4782 to 3204. [2022-01-18 05:37:57,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3204 states, 3203 states have (on average 3.3037777083983766) internal successors, (10582), 3203 states have internal predecessors, (10582), 0 states have call successors, (0), 0 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 05:37:57,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3204 states to 3204 states and 10582 transitions. [2022-01-18 05:37:57,643 INFO L78 Accepts]: Start accepts. Automaton has 3204 states and 10582 transitions. Word has length 24 [2022-01-18 05:37:57,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:37:57,643 INFO L470 AbstractCegarLoop]: Abstraction has 3204 states and 10582 transitions. [2022-01-18 05:37:57,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:37:57,643 INFO L276 IsEmpty]: Start isEmpty. Operand 3204 states and 10582 transitions. [2022-01-18 05:37:57,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:37:57,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:37:57,647 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:37:57,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Ended with exit code 0 [2022-01-18 05:37:57,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2022-01-18 05:37:57,848 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:37:57,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:37:57,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1371414008, now seen corresponding path program 34 times [2022-01-18 05:37:57,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:37:57,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922084002] [2022-01-18 05:37:57,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:37:57,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:37:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:37:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:58,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:37:58,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922084002] [2022-01-18 05:37:58,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922084002] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:37:58,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455875686] [2022-01-18 05:37:58,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:37:58,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:37:58,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:37:58,037 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:37:58,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-01-18 05:37:58,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:37:58,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:37:58,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:37:58,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:37:58,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:58,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:58,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:58,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:58,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:37:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:58,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:37:58,579 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:37:58,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:37:58,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:58,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:37:58,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:58,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:37:58,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:37:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:37:58,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455875686] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:37:58,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:37:58,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:37:58,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509545985] [2022-01-18 05:37:58,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:37:58,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:37:58,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:37:58,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:37:58,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:37:58,640 INFO L87 Difference]: Start difference. First operand 3204 states and 10582 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:38:00,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:00,142 INFO L93 Difference]: Finished difference Result 3997 states and 13358 transitions. [2022-01-18 05:38:00,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 05:38:00,142 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:38:00,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:00,150 INFO L225 Difference]: With dead ends: 3997 [2022-01-18 05:38:00,150 INFO L226 Difference]: Without dead ends: 3991 [2022-01-18 05:38:00,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=257, Invalid=2395, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 05:38:00,150 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 148 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 2023 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 3129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1073 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:00,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 149 Invalid, 3129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2023 Invalid, 0 Unknown, 1073 Unchecked, 0.7s Time] [2022-01-18 05:38:00,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3991 states. [2022-01-18 05:38:00,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3991 to 3199. [2022-01-18 05:38:00,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3199 states, 3198 states have (on average 3.3045653533458412) internal successors, (10568), 3198 states have internal predecessors, (10568), 0 states have call successors, (0), 0 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 05:38:00,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3199 states to 3199 states and 10568 transitions. [2022-01-18 05:38:00,196 INFO L78 Accepts]: Start accepts. Automaton has 3199 states and 10568 transitions. Word has length 24 [2022-01-18 05:38:00,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:00,196 INFO L470 AbstractCegarLoop]: Abstraction has 3199 states and 10568 transitions. [2022-01-18 05:38:00,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:38:00,196 INFO L276 IsEmpty]: Start isEmpty. Operand 3199 states and 10568 transitions. [2022-01-18 05:38:00,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:38:00,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:00,200 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:38:00,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Ended with exit code 0 [2022-01-18 05:38:00,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:00,401 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:38:00,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:00,401 INFO L85 PathProgramCache]: Analyzing trace with hash -436040455, now seen corresponding path program 23 times [2022-01-18 05:38:00,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:00,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031321295] [2022-01-18 05:38:00,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:00,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:00,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:00,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031321295] [2022-01-18 05:38:00,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031321295] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:00,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748593035] [2022-01-18 05:38:00,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:38:00,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:00,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:00,589 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:38:00,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-01-18 05:38:00,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:38:00,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:38:00,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:38:00,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:00,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:00,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:00,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:00,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:00,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:38:00,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:00,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:01,124 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:38:01,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:38:01,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:01,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:01,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:01,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:01,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:38:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:01,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748593035] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:01,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:01,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:38:01,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416992586] [2022-01-18 05:38:01,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:01,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:38:01,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:01,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:38:01,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:38:01,186 INFO L87 Difference]: Start difference. First operand 3199 states and 10568 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:38:02,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:02,769 INFO L93 Difference]: Finished difference Result 3842 states and 12687 transitions. [2022-01-18 05:38:02,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 05:38:02,770 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:38:02,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:02,777 INFO L225 Difference]: With dead ends: 3842 [2022-01-18 05:38:02,777 INFO L226 Difference]: Without dead ends: 3836 [2022-01-18 05:38:02,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=303, Invalid=3119, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 05:38:02,777 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 140 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 1754 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 2607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 812 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:02,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 120 Invalid, 2607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1754 Invalid, 0 Unknown, 812 Unchecked, 0.7s Time] [2022-01-18 05:38:02,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3836 states. [2022-01-18 05:38:02,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3836 to 3188. [2022-01-18 05:38:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3188 states, 3187 states have (on average 3.3049890178851586) internal successors, (10533), 3187 states have internal predecessors, (10533), 0 states have call successors, (0), 0 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 05:38:02,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3188 states to 3188 states and 10533 transitions. [2022-01-18 05:38:02,822 INFO L78 Accepts]: Start accepts. Automaton has 3188 states and 10533 transitions. Word has length 24 [2022-01-18 05:38:02,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:02,822 INFO L470 AbstractCegarLoop]: Abstraction has 3188 states and 10533 transitions. [2022-01-18 05:38:02,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:38:02,823 INFO L276 IsEmpty]: Start isEmpty. Operand 3188 states and 10533 transitions. [2022-01-18 05:38:02,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:38:02,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:02,827 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:38:02,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Ended with exit code 0 [2022-01-18 05:38:03,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:03,028 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:38:03,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:03,028 INFO L85 PathProgramCache]: Analyzing trace with hash -357538784, now seen corresponding path program 35 times [2022-01-18 05:38:03,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:03,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308511125] [2022-01-18 05:38:03,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:03,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:03,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:03,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:03,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308511125] [2022-01-18 05:38:03,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308511125] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:03,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869705378] [2022-01-18 05:38:03,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:38:03,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:03,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:03,233 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:38:03,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-01-18 05:38:03,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:38:03,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:38:03,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:38:03,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:03,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:03,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:03,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:03,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:03,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:38:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:03,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:03,765 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:38:03,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:38:03,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:03,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:03,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:03,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:03,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:38:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:03,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869705378] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:03,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:03,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:38:03,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464483814] [2022-01-18 05:38:03,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:03,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:38:03,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:03,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:38:03,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:38:03,822 INFO L87 Difference]: Start difference. First operand 3188 states and 10533 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:38:05,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:05,038 INFO L93 Difference]: Finished difference Result 4227 states and 14132 transitions. [2022-01-18 05:38:05,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 05:38:05,039 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:38:05,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:05,046 INFO L225 Difference]: With dead ends: 4227 [2022-01-18 05:38:05,047 INFO L226 Difference]: Without dead ends: 4222 [2022-01-18 05:38:05,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=300, Invalid=2150, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 05:38:05,047 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 164 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 468 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:05,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 153 Invalid, 1873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1349 Invalid, 0 Unknown, 468 Unchecked, 0.5s Time] [2022-01-18 05:38:05,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4222 states. [2022-01-18 05:38:05,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4222 to 3173. [2022-01-18 05:38:05,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3173 states, 3172 states have (on average 3.3051702395964693) internal successors, (10484), 3172 states have internal predecessors, (10484), 0 states have call successors, (0), 0 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 05:38:05,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3173 states to 3173 states and 10484 transitions. [2022-01-18 05:38:05,095 INFO L78 Accepts]: Start accepts. Automaton has 3173 states and 10484 transitions. Word has length 24 [2022-01-18 05:38:05,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:05,095 INFO L470 AbstractCegarLoop]: Abstraction has 3173 states and 10484 transitions. [2022-01-18 05:38:05,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:38:05,095 INFO L276 IsEmpty]: Start isEmpty. Operand 3173 states and 10484 transitions. [2022-01-18 05:38:05,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:38:05,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:05,099 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:38:05,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Ended with exit code 0 [2022-01-18 05:38:05,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:05,300 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:38:05,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:05,300 INFO L85 PathProgramCache]: Analyzing trace with hash -634533128, now seen corresponding path program 36 times [2022-01-18 05:38:05,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:05,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203317534] [2022-01-18 05:38:05,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:05,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:05,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:05,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:05,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203317534] [2022-01-18 05:38:05,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203317534] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:05,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037747804] [2022-01-18 05:38:05,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:38:05,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:05,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:05,490 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:38:05,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-01-18 05:38:05,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:38:05,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:38:05,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:38:05,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:05,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:05,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:05,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:05,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:05,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:38:05,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:05,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:06,063 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:38:06,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:38:06,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:06,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:06,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:06,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:06,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:38:06,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:06,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037747804] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:06,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:06,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:38:06,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083406380] [2022-01-18 05:38:06,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:06,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:38:06,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:06,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:38:06,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:38:06,128 INFO L87 Difference]: Start difference. First operand 3173 states and 10484 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:38:06,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:06,868 INFO L93 Difference]: Finished difference Result 3472 states and 11405 transitions. [2022-01-18 05:38:06,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 05:38:06,868 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:38:06,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:06,874 INFO L225 Difference]: With dead ends: 3472 [2022-01-18 05:38:06,874 INFO L226 Difference]: Without dead ends: 3466 [2022-01-18 05:38:06,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 05:38:06,874 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 117 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:06,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 173 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1018 Invalid, 0 Unknown, 347 Unchecked, 0.4s Time] [2022-01-18 05:38:06,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3466 states. [2022-01-18 05:38:06,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3466 to 3178. [2022-01-18 05:38:06,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3178 states, 3177 states have (on average 3.304060434372049) internal successors, (10497), 3177 states have internal predecessors, (10497), 0 states have call successors, (0), 0 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 05:38:06,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 10497 transitions. [2022-01-18 05:38:06,914 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 10497 transitions. Word has length 24 [2022-01-18 05:38:06,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:06,914 INFO L470 AbstractCegarLoop]: Abstraction has 3178 states and 10497 transitions. [2022-01-18 05:38:06,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:38:06,914 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 10497 transitions. [2022-01-18 05:38:06,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:38:06,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:06,919 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:38:06,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Ended with exit code 0 [2022-01-18 05:38:07,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:07,119 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:38:07,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:07,120 INFO L85 PathProgramCache]: Analyzing trace with hash 740677364, now seen corresponding path program 37 times [2022-01-18 05:38:07,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:07,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674026617] [2022-01-18 05:38:07,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:07,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:07,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:07,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:07,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674026617] [2022-01-18 05:38:07,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674026617] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:07,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477830909] [2022-01-18 05:38:07,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:38:07,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:07,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:07,311 INFO L229 MonitoredProcess]: Starting monitored process 300 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:38:07,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-01-18 05:38:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:07,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:38:07,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:07,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:07,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:07,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:07,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:07,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:38:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:07,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:07,869 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:38:07,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:38:07,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:07,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:07,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:07,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:07,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:38:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:07,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477830909] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:07,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:07,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:38:07,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830505331] [2022-01-18 05:38:07,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:07,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:38:07,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:07,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:38:07,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:38:07,932 INFO L87 Difference]: Start difference. First operand 3178 states and 10497 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:38:09,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:09,159 INFO L93 Difference]: Finished difference Result 3569 states and 11687 transitions. [2022-01-18 05:38:09,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 05:38:09,159 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:38:09,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:09,166 INFO L225 Difference]: With dead ends: 3569 [2022-01-18 05:38:09,166 INFO L226 Difference]: Without dead ends: 3563 [2022-01-18 05:38:09,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=237, Invalid=2213, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 05:38:09,166 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 125 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1617 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 2106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 459 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:09,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 150 Invalid, 2106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1617 Invalid, 0 Unknown, 459 Unchecked, 0.6s Time] [2022-01-18 05:38:09,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2022-01-18 05:38:09,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 3184. [2022-01-18 05:38:09,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3184 states, 3183 states have (on average 3.3034872761545713) internal successors, (10515), 3183 states have internal predecessors, (10515), 0 states have call successors, (0), 0 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 05:38:09,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3184 states to 3184 states and 10515 transitions. [2022-01-18 05:38:09,209 INFO L78 Accepts]: Start accepts. Automaton has 3184 states and 10515 transitions. Word has length 24 [2022-01-18 05:38:09,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:09,209 INFO L470 AbstractCegarLoop]: Abstraction has 3184 states and 10515 transitions. [2022-01-18 05:38:09,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:38:09,209 INFO L276 IsEmpty]: Start isEmpty. Operand 3184 states and 10515 transitions. [2022-01-18 05:38:09,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:38:09,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:09,213 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:38:09,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Ended with exit code 0 [2022-01-18 05:38:09,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:09,414 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:38:09,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:09,414 INFO L85 PathProgramCache]: Analyzing trace with hash 599037235, now seen corresponding path program 7 times [2022-01-18 05:38:09,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:09,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240089564] [2022-01-18 05:38:09,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:09,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:09,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:09,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240089564] [2022-01-18 05:38:09,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240089564] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:09,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654401367] [2022-01-18 05:38:09,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:38:09,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:09,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:09,604 INFO L229 MonitoredProcess]: Starting monitored process 301 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:38:09,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-01-18 05:38:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:09,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:38:09,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:09,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:09,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:09,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:09,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:09,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:38:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:09,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:10,163 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:38:10,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:38:10,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:10,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:10,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:10,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:10,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:38:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:10,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654401367] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:10,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:10,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:38:10,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811874084] [2022-01-18 05:38:10,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:10,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:38:10,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:10,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:38:10,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:38:10,216 INFO L87 Difference]: Start difference. First operand 3184 states and 10515 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:38:11,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:11,401 INFO L93 Difference]: Finished difference Result 3576 states and 11731 transitions. [2022-01-18 05:38:11,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 05:38:11,402 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:38:11,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:11,409 INFO L225 Difference]: With dead ends: 3576 [2022-01-18 05:38:11,409 INFO L226 Difference]: Without dead ends: 3574 [2022-01-18 05:38:11,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=231, Invalid=2121, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 05:38:11,409 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 140 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 568 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:11,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 148 Invalid, 2122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1521 Invalid, 0 Unknown, 568 Unchecked, 0.6s Time] [2022-01-18 05:38:11,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3574 states. [2022-01-18 05:38:11,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3574 to 3184. [2022-01-18 05:38:11,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3184 states, 3183 states have (on average 3.3034872761545713) internal successors, (10515), 3183 states have internal predecessors, (10515), 0 states have call successors, (0), 0 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 05:38:11,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3184 states to 3184 states and 10515 transitions. [2022-01-18 05:38:11,454 INFO L78 Accepts]: Start accepts. Automaton has 3184 states and 10515 transitions. Word has length 24 [2022-01-18 05:38:11,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:11,454 INFO L470 AbstractCegarLoop]: Abstraction has 3184 states and 10515 transitions. [2022-01-18 05:38:11,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:38:11,454 INFO L276 IsEmpty]: Start isEmpty. Operand 3184 states and 10515 transitions. [2022-01-18 05:38:11,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:38:11,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:11,459 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:38:11,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Ended with exit code 0 [2022-01-18 05:38:11,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-01-18 05:38:11,659 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:38:11,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:11,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1101331882, now seen corresponding path program 38 times [2022-01-18 05:38:11,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:11,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117140605] [2022-01-18 05:38:11,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:11,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:11,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:11,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:11,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117140605] [2022-01-18 05:38:11,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117140605] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:11,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058808173] [2022-01-18 05:38:11,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:38:11,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:11,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:11,856 INFO L229 MonitoredProcess]: Starting monitored process 302 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:38:11,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-01-18 05:38:11,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:38:11,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:38:11,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 05:38:11,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:12,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:12,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:12,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:38:12,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 50 [2022-01-18 05:38:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:12,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:13,121 INFO L387 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 9 treesize of output 5 [2022-01-18 05:38:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:13,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058808173] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:13,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:13,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-01-18 05:38:13,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200953382] [2022-01-18 05:38:13,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:13,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:38:13,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:13,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:38:13,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:38:13,134 INFO L87 Difference]: Start difference. First operand 3184 states and 10515 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:38:14,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:14,065 INFO L93 Difference]: Finished difference Result 3847 states and 12725 transitions. [2022-01-18 05:38:14,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 05:38:14,066 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:38:14,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:14,073 INFO L225 Difference]: With dead ends: 3847 [2022-01-18 05:38:14,073 INFO L226 Difference]: Without dead ends: 3835 [2022-01-18 05:38:14,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 12 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=329, Invalid=2221, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 05:38:14,073 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 279 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 886 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:14,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 137 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 648 Invalid, 0 Unknown, 886 Unchecked, 0.3s Time] [2022-01-18 05:38:14,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3835 states. [2022-01-18 05:38:14,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3835 to 3176. [2022-01-18 05:38:14,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3176 states, 3175 states have (on average 3.305196850393701) internal successors, (10494), 3175 states have internal predecessors, (10494), 0 states have call successors, (0), 0 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 05:38:14,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3176 states to 3176 states and 10494 transitions. [2022-01-18 05:38:14,118 INFO L78 Accepts]: Start accepts. Automaton has 3176 states and 10494 transitions. Word has length 24 [2022-01-18 05:38:14,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:14,118 INFO L470 AbstractCegarLoop]: Abstraction has 3176 states and 10494 transitions. [2022-01-18 05:38:14,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:38:14,118 INFO L276 IsEmpty]: Start isEmpty. Operand 3176 states and 10494 transitions. [2022-01-18 05:38:14,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:38:14,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:14,122 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:38:14,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Forceful destruction successful, exit code 0 [2022-01-18 05:38:14,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-01-18 05:38:14,323 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:38:14,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:14,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1176790384, now seen corresponding path program 39 times [2022-01-18 05:38:14,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:14,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647407351] [2022-01-18 05:38:14,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:14,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:14,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:14,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:14,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647407351] [2022-01-18 05:38:14,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647407351] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:14,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560456630] [2022-01-18 05:38:14,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:38:14,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:14,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:14,532 INFO L229 MonitoredProcess]: Starting monitored process 303 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:38:14,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-01-18 05:38:14,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:38:14,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:38:14,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:38:14,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:14,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:14,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:14,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:14,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:14,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-01-18 05:38:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:15,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:15,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:15,347 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:38:15,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-01-18 05:38:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:15,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560456630] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:15,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:15,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:38:15,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414511523] [2022-01-18 05:38:15,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:15,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:38:15,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:15,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:38:15,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:38:15,479 INFO L87 Difference]: Start difference. First operand 3176 states and 10494 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:38:16,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:16,460 INFO L93 Difference]: Finished difference Result 3548 states and 11747 transitions. [2022-01-18 05:38:16,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 05:38:16,460 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:38:16,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:16,466 INFO L225 Difference]: With dead ends: 3548 [2022-01-18 05:38:16,466 INFO L226 Difference]: Without dead ends: 3542 [2022-01-18 05:38:16,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=218, Invalid=1588, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 05:38:16,466 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 113 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 2488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1112 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:16,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 158 Invalid, 2488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1356 Invalid, 0 Unknown, 1112 Unchecked, 0.5s Time] [2022-01-18 05:38:16,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3542 states. [2022-01-18 05:38:16,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3542 to 3177. [2022-01-18 05:38:16,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3177 states, 3176 states have (on average 3.304785894206549) internal successors, (10496), 3176 states have internal predecessors, (10496), 0 states have call successors, (0), 0 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 05:38:16,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 10496 transitions. [2022-01-18 05:38:16,504 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 10496 transitions. Word has length 24 [2022-01-18 05:38:16,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:16,504 INFO L470 AbstractCegarLoop]: Abstraction has 3177 states and 10496 transitions. [2022-01-18 05:38:16,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:38:16,504 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 10496 transitions. [2022-01-18 05:38:16,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:38:16,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:16,508 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:38:16,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Forceful destruction successful, exit code 0 [2022-01-18 05:38:16,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2022-01-18 05:38:16,709 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:38:16,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:16,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1048556492, now seen corresponding path program 40 times [2022-01-18 05:38:16,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:16,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451099897] [2022-01-18 05:38:16,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:16,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:16,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:16,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:16,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:16,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451099897] [2022-01-18 05:38:16,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451099897] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:16,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457887852] [2022-01-18 05:38:16,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:38:16,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:16,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:16,940 INFO L229 MonitoredProcess]: Starting monitored process 304 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:38:16,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-01-18 05:38:16,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:38:16,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:38:16,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:38:16,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:17,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:17,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:17,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:17,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:17,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:38:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:17,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:17,473 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:38:17,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:38:17,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:17,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:17,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:17,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:17,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:38:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:17,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457887852] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:17,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:17,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:38:17,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682949417] [2022-01-18 05:38:17,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:17,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:38:17,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:17,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:38:17,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:38:17,550 INFO L87 Difference]: Start difference. First operand 3177 states and 10496 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:38:18,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:18,804 INFO L93 Difference]: Finished difference Result 3607 states and 11940 transitions. [2022-01-18 05:38:18,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 05:38:18,805 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:38:18,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:18,812 INFO L225 Difference]: With dead ends: 3607 [2022-01-18 05:38:18,812 INFO L226 Difference]: Without dead ends: 3601 [2022-01-18 05:38:18,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=281, Invalid=2071, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 05:38:18,812 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 374 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:18,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 152 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1571 Invalid, 0 Unknown, 374 Unchecked, 0.6s Time] [2022-01-18 05:38:18,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3601 states. [2022-01-18 05:38:18,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3601 to 3181. [2022-01-18 05:38:18,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3181 states, 3180 states have (on average 3.3037735849056604) internal successors, (10506), 3180 states have internal predecessors, (10506), 0 states have call successors, (0), 0 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 05:38:18,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3181 states to 3181 states and 10506 transitions. [2022-01-18 05:38:18,859 INFO L78 Accepts]: Start accepts. Automaton has 3181 states and 10506 transitions. Word has length 24 [2022-01-18 05:38:18,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:18,859 INFO L470 AbstractCegarLoop]: Abstraction has 3181 states and 10506 transitions. [2022-01-18 05:38:18,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:38:18,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3181 states and 10506 transitions. [2022-01-18 05:38:18,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:38:18,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:18,864 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:38:18,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Forceful destruction successful, exit code 0 [2022-01-18 05:38:19,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:19,064 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:38:19,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:19,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1359815116, now seen corresponding path program 41 times [2022-01-18 05:38:19,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:19,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090864091] [2022-01-18 05:38:19,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:19,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:19,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:19,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090864091] [2022-01-18 05:38:19,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090864091] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:19,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829752559] [2022-01-18 05:38:19,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:38:19,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:19,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:19,332 INFO L229 MonitoredProcess]: Starting monitored process 305 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:38:19,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-01-18 05:38:19,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:38:19,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:38:19,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:38:19,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:19,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:19,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:38:19,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-01-18 05:38:19,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:19,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:20,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:20,184 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:38:20,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-01-18 05:38:20,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:20,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829752559] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:20,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:20,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:38:20,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185136064] [2022-01-18 05:38:20,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:20,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:38:20,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:20,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:38:20,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:38:20,294 INFO L87 Difference]: Start difference. First operand 3181 states and 10506 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:38:21,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:21,142 INFO L93 Difference]: Finished difference Result 3422 states and 11316 transitions. [2022-01-18 05:38:21,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 05:38:21,142 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:38:21,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:21,148 INFO L225 Difference]: With dead ends: 3422 [2022-01-18 05:38:21,148 INFO L226 Difference]: Without dead ends: 3416 [2022-01-18 05:38:21,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=193, Invalid=1367, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 05:38:21,148 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 79 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 652 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:21,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 125 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1169 Invalid, 0 Unknown, 652 Unchecked, 0.5s Time] [2022-01-18 05:38:21,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-01-18 05:38:21,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 3186. [2022-01-18 05:38:21,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3186 states, 3185 states have (on average 3.302354788069074) internal successors, (10518), 3185 states have internal predecessors, (10518), 0 states have call successors, (0), 0 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 05:38:21,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 10518 transitions. [2022-01-18 05:38:21,185 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 10518 transitions. Word has length 24 [2022-01-18 05:38:21,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:21,186 INFO L470 AbstractCegarLoop]: Abstraction has 3186 states and 10518 transitions. [2022-01-18 05:38:21,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:38:21,186 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 10518 transitions. [2022-01-18 05:38:21,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:38:21,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:21,190 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:38:21,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Ended with exit code 0 [2022-01-18 05:38:21,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2022-01-18 05:38:21,390 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:38:21,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:21,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1866863504, now seen corresponding path program 42 times [2022-01-18 05:38:21,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:21,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933601081] [2022-01-18 05:38:21,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:21,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:21,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:21,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933601081] [2022-01-18 05:38:21,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933601081] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:21,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949500530] [2022-01-18 05:38:21,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:38:21,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:21,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:21,618 INFO L229 MonitoredProcess]: Starting monitored process 306 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:38:21,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-01-18 05:38:21,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:38:21,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:38:21,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 05:38:21,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:21,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:21,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:21,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:21,975 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:38:21,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 42 [2022-01-18 05:38:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:22,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:22,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:22,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:22,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:22,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:22,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 7 [2022-01-18 05:38:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:22,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949500530] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:22,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:22,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-01-18 05:38:22,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902809763] [2022-01-18 05:38:22,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:22,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:38:22,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:22,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:38:22,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:38:22,998 INFO L87 Difference]: Start difference. First operand 3186 states and 10518 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:38:24,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:24,289 INFO L93 Difference]: Finished difference Result 3647 states and 12033 transitions. [2022-01-18 05:38:24,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 05:38:24,289 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:38:24,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:24,296 INFO L225 Difference]: With dead ends: 3647 [2022-01-18 05:38:24,296 INFO L226 Difference]: Without dead ends: 3641 [2022-01-18 05:38:24,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=240, Invalid=2210, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 05:38:24,296 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 109 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 1758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 476 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:24,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 144 Invalid, 1758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1260 Invalid, 0 Unknown, 476 Unchecked, 0.5s Time] [2022-01-18 05:38:24,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3641 states. [2022-01-18 05:38:24,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3641 to 3188. [2022-01-18 05:38:24,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3188 states, 3187 states have (on average 3.3018512707875747) internal successors, (10523), 3187 states have internal predecessors, (10523), 0 states have call successors, (0), 0 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 05:38:24,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3188 states to 3188 states and 10523 transitions. [2022-01-18 05:38:24,335 INFO L78 Accepts]: Start accepts. Automaton has 3188 states and 10523 transitions. Word has length 24 [2022-01-18 05:38:24,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:24,335 INFO L470 AbstractCegarLoop]: Abstraction has 3188 states and 10523 transitions. [2022-01-18 05:38:24,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:38:24,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3188 states and 10523 transitions. [2022-01-18 05:38:24,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:38:24,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:24,339 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:38:24,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Forceful destruction successful, exit code 0 [2022-01-18 05:38:24,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2022-01-18 05:38:24,539 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:38:24,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:24,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1133296982, now seen corresponding path program 43 times [2022-01-18 05:38:24,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:24,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149936586] [2022-01-18 05:38:24,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:24,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:24,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:24,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149936586] [2022-01-18 05:38:24,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149936586] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:24,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089417011] [2022-01-18 05:38:24,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:38:24,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:24,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:24,766 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:38:24,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-01-18 05:38:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:24,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:38:24,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:24,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:24,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:24,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:24,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:24,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-01-18 05:38:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:25,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:25,267 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:38:25,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:38:25,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:25,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:25,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:25,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:25,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:38:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:25,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089417011] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:25,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:25,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 26 [2022-01-18 05:38:25,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120068799] [2022-01-18 05:38:25,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:25,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 05:38:25,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:25,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 05:38:25,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:38:25,328 INFO L87 Difference]: Start difference. First operand 3188 states and 10523 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:38:25,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:25,983 INFO L93 Difference]: Finished difference Result 3418 states and 11337 transitions. [2022-01-18 05:38:25,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 05:38:25,983 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:38:25,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:25,989 INFO L225 Difference]: With dead ends: 3418 [2022-01-18 05:38:25,989 INFO L226 Difference]: Without dead ends: 3411 [2022-01-18 05:38:25,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 05:38:25,990 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:25,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 79 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1128 Invalid, 0 Unknown, 197 Unchecked, 0.4s Time] [2022-01-18 05:38:25,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2022-01-18 05:38:26,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 3183. [2022-01-18 05:38:26,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3183 states, 3182 states have (on average 3.3035826524198617) internal successors, (10512), 3182 states have internal predecessors, (10512), 0 states have call successors, (0), 0 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 05:38:26,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 10512 transitions. [2022-01-18 05:38:26,034 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 10512 transitions. Word has length 24 [2022-01-18 05:38:26,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:26,034 INFO L470 AbstractCegarLoop]: Abstraction has 3183 states and 10512 transitions. [2022-01-18 05:38:26,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:38:26,034 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 10512 transitions. [2022-01-18 05:38:26,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:38:26,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:26,039 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:38:26,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Ended with exit code 0 [2022-01-18 05:38:26,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:26,239 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:38:26,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:26,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1140091753, now seen corresponding path program 24 times [2022-01-18 05:38:26,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:26,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293161278] [2022-01-18 05:38:26,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:26,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:26,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:26,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:26,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293161278] [2022-01-18 05:38:26,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293161278] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:26,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371826830] [2022-01-18 05:38:26,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:38:26,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:26,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:26,431 INFO L229 MonitoredProcess]: Starting monitored process 308 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:38:26,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-01-18 05:38:26,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:38:26,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:38:26,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:38:26,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:26,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:26,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:26,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:26,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:26,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:38:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:26,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:27,002 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:38:27,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:38:27,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:27,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:27,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:27,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:27,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:38:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:27,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371826830] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:27,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:27,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:38:27,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550908968] [2022-01-18 05:38:27,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:27,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:38:27,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:27,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:38:27,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:38:27,067 INFO L87 Difference]: Start difference. First operand 3183 states and 10512 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:38:28,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:28,478 INFO L93 Difference]: Finished difference Result 3604 states and 11867 transitions. [2022-01-18 05:38:28,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 05:38:28,478 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:38:28,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:28,485 INFO L225 Difference]: With dead ends: 3604 [2022-01-18 05:38:28,485 INFO L226 Difference]: Without dead ends: 3598 [2022-01-18 05:38:28,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=261, Invalid=2391, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 05:38:28,486 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 138 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 1790 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 2732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 907 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:28,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 180 Invalid, 2732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1790 Invalid, 0 Unknown, 907 Unchecked, 0.7s Time] [2022-01-18 05:38:28,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2022-01-18 05:38:28,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 3186. [2022-01-18 05:38:28,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3186 states, 3185 states have (on average 3.302668759811617) internal successors, (10519), 3185 states have internal predecessors, (10519), 0 states have call successors, (0), 0 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 05:38:28,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 10519 transitions. [2022-01-18 05:38:28,530 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 10519 transitions. Word has length 24 [2022-01-18 05:38:28,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:28,530 INFO L470 AbstractCegarLoop]: Abstraction has 3186 states and 10519 transitions. [2022-01-18 05:38:28,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:38:28,530 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 10519 transitions. [2022-01-18 05:38:28,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:38:28,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:28,534 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:38:28,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Ended with exit code 0 [2022-01-18 05:38:28,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable318 [2022-01-18 05:38:28,734 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:38:28,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:28,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1890429969, now seen corresponding path program 25 times [2022-01-18 05:38:28,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:28,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420727596] [2022-01-18 05:38:28,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:28,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:28,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:28,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:28,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:28,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420727596] [2022-01-18 05:38:28,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420727596] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:28,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645935198] [2022-01-18 05:38:28,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:38:28,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:28,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:28,928 INFO L229 MonitoredProcess]: Starting monitored process 309 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:38:28,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-01-18 05:38:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:28,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:38:28,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:29,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:29,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:29,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:29,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:29,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:38:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:29,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:29,497 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:38:29,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:38:29,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:29,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:29,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:29,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:29,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:38:29,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:29,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645935198] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:29,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:29,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:38:29,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21230465] [2022-01-18 05:38:29,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:29,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:38:29,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:29,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:38:29,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:38:29,560 INFO L87 Difference]: Start difference. First operand 3186 states and 10519 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:38:30,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:30,288 INFO L93 Difference]: Finished difference Result 3492 states and 11488 transitions. [2022-01-18 05:38:30,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 05:38:30,288 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:38:30,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:30,295 INFO L225 Difference]: With dead ends: 3492 [2022-01-18 05:38:30,295 INFO L226 Difference]: Without dead ends: 3490 [2022-01-18 05:38:30,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=157, Invalid=1565, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 05:38:30,295 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 80 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:30,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 165 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 994 Invalid, 0 Unknown, 261 Unchecked, 0.4s Time] [2022-01-18 05:38:30,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3490 states. [2022-01-18 05:38:30,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3490 to 3189. [2022-01-18 05:38:30,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3189 states, 3188 states have (on average 3.3017565872020076) internal successors, (10526), 3188 states have internal predecessors, (10526), 0 states have call successors, (0), 0 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 05:38:30,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3189 states to 3189 states and 10526 transitions. [2022-01-18 05:38:30,339 INFO L78 Accepts]: Start accepts. Automaton has 3189 states and 10526 transitions. Word has length 24 [2022-01-18 05:38:30,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:30,339 INFO L470 AbstractCegarLoop]: Abstraction has 3189 states and 10526 transitions. [2022-01-18 05:38:30,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:38:30,339 INFO L276 IsEmpty]: Start isEmpty. Operand 3189 states and 10526 transitions. [2022-01-18 05:38:30,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:38:30,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:30,344 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:38:30,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Ended with exit code 0 [2022-01-18 05:38:30,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:30,544 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:38:30,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:30,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1357924184, now seen corresponding path program 9 times [2022-01-18 05:38:30,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:30,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997174864] [2022-01-18 05:38:30,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:30,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:30,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:30,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997174864] [2022-01-18 05:38:30,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997174864] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:30,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557704756] [2022-01-18 05:38:30,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:38:30,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:30,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:30,735 INFO L229 MonitoredProcess]: Starting monitored process 310 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:38:30,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-01-18 05:38:30,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:38:30,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:38:30,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:38:30,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:31,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:31,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:31,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:31,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:38:31,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 05:38:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:31,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:31,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:31,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:31,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:38:31,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:38:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:31,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557704756] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:31,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:31,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-01-18 05:38:31,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635612077] [2022-01-18 05:38:31,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:31,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:38:31,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:31,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:38:31,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:38:31,798 INFO L87 Difference]: Start difference. First operand 3189 states and 10526 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:38:34,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:34,450 INFO L93 Difference]: Finished difference Result 4340 states and 14622 transitions. [2022-01-18 05:38:34,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 05:38:34,450 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:38:34,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:34,459 INFO L225 Difference]: With dead ends: 4340 [2022-01-18 05:38:34,459 INFO L226 Difference]: Without dead ends: 4336 [2022-01-18 05:38:34,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=617, Invalid=4353, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 05:38:34,460 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 146 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 925 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:34,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 159 Invalid, 1797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 835 Invalid, 0 Unknown, 925 Unchecked, 0.4s Time] [2022-01-18 05:38:34,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4336 states. [2022-01-18 05:38:34,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4336 to 3197. [2022-01-18 05:38:34,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3197 states, 3196 states have (on average 3.3003754693366707) internal successors, (10548), 3196 states have internal predecessors, (10548), 0 states have call successors, (0), 0 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 05:38:34,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 10548 transitions. [2022-01-18 05:38:34,507 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 10548 transitions. Word has length 24 [2022-01-18 05:38:34,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:34,507 INFO L470 AbstractCegarLoop]: Abstraction has 3197 states and 10548 transitions. [2022-01-18 05:38:34,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:38:34,507 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 10548 transitions. [2022-01-18 05:38:34,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:38:34,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:34,512 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:38:34,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Ended with exit code 0 [2022-01-18 05:38:34,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320,310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:34,712 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:38:34,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:34,712 INFO L85 PathProgramCache]: Analyzing trace with hash 93478610, now seen corresponding path program 10 times [2022-01-18 05:38:34,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:34,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827762799] [2022-01-18 05:38:34,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:34,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:34,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:34,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:34,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827762799] [2022-01-18 05:38:34,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827762799] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:34,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513709873] [2022-01-18 05:38:34,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:38:34,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:34,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:34,905 INFO L229 MonitoredProcess]: Starting monitored process 311 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:38:34,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-01-18 05:38:34,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:38:34,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:38:34,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:38:34,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:35,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:35,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:35,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:35,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:35,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:38:35,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:35,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:35,493 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:38:35,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:38:35,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:35,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:35,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:35,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:35,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:38:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:35,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513709873] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:35,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:35,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:38:35,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184642920] [2022-01-18 05:38:35,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:35,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:38:35,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:35,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:38:35,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:38:35,562 INFO L87 Difference]: Start difference. First operand 3197 states and 10548 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:38:36,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:36,783 INFO L93 Difference]: Finished difference Result 3563 states and 11652 transitions. [2022-01-18 05:38:36,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 05:38:36,783 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:38:36,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:36,790 INFO L225 Difference]: With dead ends: 3563 [2022-01-18 05:38:36,790 INFO L226 Difference]: Without dead ends: 3559 [2022-01-18 05:38:36,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=237, Invalid=2213, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 05:38:36,791 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 121 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 2065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 482 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:36,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 264 Invalid, 2065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1546 Invalid, 0 Unknown, 482 Unchecked, 0.6s Time] [2022-01-18 05:38:36,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3559 states. [2022-01-18 05:38:36,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3559 to 3196. [2022-01-18 05:38:36,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3196 states, 3195 states have (on average 3.300469483568075) internal successors, (10545), 3195 states have internal predecessors, (10545), 0 states have call successors, (0), 0 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 05:38:36,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3196 states to 3196 states and 10545 transitions. [2022-01-18 05:38:36,835 INFO L78 Accepts]: Start accepts. Automaton has 3196 states and 10545 transitions. Word has length 24 [2022-01-18 05:38:36,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:36,835 INFO L470 AbstractCegarLoop]: Abstraction has 3196 states and 10545 transitions. [2022-01-18 05:38:36,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:38:36,835 INFO L276 IsEmpty]: Start isEmpty. Operand 3196 states and 10545 transitions. [2022-01-18 05:38:36,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:38:36,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:36,839 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:38:36,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Ended with exit code 0 [2022-01-18 05:38:37,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2022-01-18 05:38:37,040 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:38:37,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:37,040 INFO L85 PathProgramCache]: Analyzing trace with hash 48420723, now seen corresponding path program 26 times [2022-01-18 05:38:37,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:37,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860408855] [2022-01-18 05:38:37,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:37,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:37,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:37,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:37,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860408855] [2022-01-18 05:38:37,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860408855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:37,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619254201] [2022-01-18 05:38:37,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:38:37,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:37,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:37,233 INFO L229 MonitoredProcess]: Starting monitored process 312 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:38:37,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-01-18 05:38:37,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:38:37,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:38:37,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 05:38:37,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:37,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:37,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:37,511 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:38:37,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 52 [2022-01-18 05:38:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:37,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:38,511 INFO L387 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 9 treesize of output 5 [2022-01-18 05:38:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:38,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619254201] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:38,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:38,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-01-18 05:38:38,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620065408] [2022-01-18 05:38:38,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:38,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:38:38,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:38,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:38:38,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:38:38,524 INFO L87 Difference]: Start difference. First operand 3196 states and 10545 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:38:39,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:39,388 INFO L93 Difference]: Finished difference Result 3836 states and 12765 transitions. [2022-01-18 05:38:39,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 05:38:39,388 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:38:39,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:39,395 INFO L225 Difference]: With dead ends: 3836 [2022-01-18 05:38:39,395 INFO L226 Difference]: Without dead ends: 3834 [2022-01-18 05:38:39,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=342, Invalid=2414, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 05:38:39,395 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 168 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 499 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:39,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 126 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 538 Invalid, 0 Unknown, 499 Unchecked, 0.2s Time] [2022-01-18 05:38:39,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3834 states. [2022-01-18 05:38:39,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3834 to 3208. [2022-01-18 05:38:39,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3208 states, 3207 states have (on average 3.299968818210165) internal successors, (10583), 3207 states have internal predecessors, (10583), 0 states have call successors, (0), 0 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 05:38:39,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 10583 transitions. [2022-01-18 05:38:39,441 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 10583 transitions. Word has length 24 [2022-01-18 05:38:39,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:39,441 INFO L470 AbstractCegarLoop]: Abstraction has 3208 states and 10583 transitions. [2022-01-18 05:38:39,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:38:39,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 10583 transitions. [2022-01-18 05:38:39,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:38:39,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:39,446 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:38:39,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Ended with exit code 0 [2022-01-18 05:38:39,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2022-01-18 05:38:39,646 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:38:39,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:39,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1606890507, now seen corresponding path program 27 times [2022-01-18 05:38:39,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:39,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484809077] [2022-01-18 05:38:39,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:39,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:39,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:39,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:39,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484809077] [2022-01-18 05:38:39,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484809077] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:39,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552032816] [2022-01-18 05:38:39,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:38:39,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:39,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:39,843 INFO L229 MonitoredProcess]: Starting monitored process 313 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:38:39,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-01-18 05:38:39,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:38:39,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:38:39,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:38:39,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:40,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:40,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:40,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:40,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:38:40,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 05:38:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:40,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:40,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:40,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:40,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:38:40,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:38:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:40,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552032816] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:40,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:40,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:38:40,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659031077] [2022-01-18 05:38:40,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:40,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:38:40,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:40,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:38:40,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:38:40,928 INFO L87 Difference]: Start difference. First operand 3208 states and 10583 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:38:41,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:41,851 INFO L93 Difference]: Finished difference Result 4328 states and 14745 transitions. [2022-01-18 05:38:41,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 05:38:41,852 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:38:41,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:41,860 INFO L225 Difference]: With dead ends: 4328 [2022-01-18 05:38:41,860 INFO L226 Difference]: Without dead ends: 4324 [2022-01-18 05:38:41,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=344, Invalid=2206, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 05:38:41,861 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 575 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:41,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 127 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 376 Invalid, 0 Unknown, 575 Unchecked, 0.2s Time] [2022-01-18 05:38:41,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2022-01-18 05:38:41,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 3216. [2022-01-18 05:38:41,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3216 states, 3215 states have (on average 3.2973561430793157) internal successors, (10601), 3215 states have internal predecessors, (10601), 0 states have call successors, (0), 0 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 05:38:41,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3216 states to 3216 states and 10601 transitions. [2022-01-18 05:38:41,914 INFO L78 Accepts]: Start accepts. Automaton has 3216 states and 10601 transitions. Word has length 24 [2022-01-18 05:38:41,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:41,915 INFO L470 AbstractCegarLoop]: Abstraction has 3216 states and 10601 transitions. [2022-01-18 05:38:41,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:38:41,915 INFO L276 IsEmpty]: Start isEmpty. Operand 3216 states and 10601 transitions. [2022-01-18 05:38:41,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:38:41,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:41,919 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:38:41,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Ended with exit code 0 [2022-01-18 05:38:42,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-01-18 05:38:42,119 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:38:42,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:42,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1216633103, now seen corresponding path program 28 times [2022-01-18 05:38:42,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:42,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658409466] [2022-01-18 05:38:42,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:42,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:42,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:42,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:42,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658409466] [2022-01-18 05:38:42,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658409466] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:42,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485388420] [2022-01-18 05:38:42,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:38:42,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:42,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:42,326 INFO L229 MonitoredProcess]: Starting monitored process 314 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:38:42,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-01-18 05:38:42,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:38:42,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:38:42,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:38:42,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:42,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:42,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:42,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:42,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:42,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:38:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:42,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:42,846 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:38:42,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:38:42,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:42,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:42,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:42,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:42,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:38:42,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:42,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485388420] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:42,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:42,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:38:42,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641551383] [2022-01-18 05:38:42,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:42,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:38:42,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:42,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:38:42,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:38:42,911 INFO L87 Difference]: Start difference. First operand 3216 states and 10601 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:38:43,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:43,616 INFO L93 Difference]: Finished difference Result 3588 states and 11818 transitions. [2022-01-18 05:38:43,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 05:38:43,617 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:38:43,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:43,623 INFO L225 Difference]: With dead ends: 3588 [2022-01-18 05:38:43,623 INFO L226 Difference]: Without dead ends: 3583 [2022-01-18 05:38:43,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 05:38:43,624 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 159 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 947 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:43,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 125 Invalid, 1994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1026 Invalid, 0 Unknown, 947 Unchecked, 0.4s Time] [2022-01-18 05:38:43,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3583 states. [2022-01-18 05:38:43,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3583 to 3202. [2022-01-18 05:38:43,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3202 states, 3201 states have (on average 3.3008434864104967) internal successors, (10566), 3201 states have internal predecessors, (10566), 0 states have call successors, (0), 0 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 05:38:43,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3202 states to 3202 states and 10566 transitions. [2022-01-18 05:38:43,669 INFO L78 Accepts]: Start accepts. Automaton has 3202 states and 10566 transitions. Word has length 24 [2022-01-18 05:38:43,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:43,669 INFO L470 AbstractCegarLoop]: Abstraction has 3202 states and 10566 transitions. [2022-01-18 05:38:43,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:38:43,669 INFO L276 IsEmpty]: Start isEmpty. Operand 3202 states and 10566 transitions. [2022-01-18 05:38:43,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:38:43,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:43,674 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:38:43,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Ended with exit code 0 [2022-01-18 05:38:43,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:43,874 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:38:43,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:43,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1682349009, now seen corresponding path program 29 times [2022-01-18 05:38:43,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:43,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833218437] [2022-01-18 05:38:43,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:43,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:43,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:44,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:44,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:44,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833218437] [2022-01-18 05:38:44,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833218437] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:44,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859550998] [2022-01-18 05:38:44,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:38:44,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:44,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:44,091 INFO L229 MonitoredProcess]: Starting monitored process 315 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:38:44,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-01-18 05:38:44,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:38:44,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:38:44,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:38:44,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:44,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:44,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:44,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:44,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:44,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:38:44,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:44,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:44,629 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:38:44,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:38:44,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:44,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:44,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:44,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:44,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:38:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:44,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859550998] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:44,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:44,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:38:44,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546673264] [2022-01-18 05:38:44,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:44,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:38:44,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:44,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:38:44,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:38:44,686 INFO L87 Difference]: Start difference. First operand 3202 states and 10566 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:38:45,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:45,468 INFO L93 Difference]: Finished difference Result 3512 states and 11599 transitions. [2022-01-18 05:38:45,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 05:38:45,468 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:38:45,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:45,474 INFO L225 Difference]: With dead ends: 3512 [2022-01-18 05:38:45,474 INFO L226 Difference]: Without dead ends: 3506 [2022-01-18 05:38:45,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 05:38:45,475 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 76 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 364 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:45,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 135 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1160 Invalid, 0 Unknown, 364 Unchecked, 0.4s Time] [2022-01-18 05:38:45,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3506 states. [2022-01-18 05:38:45,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3506 to 3204. [2022-01-18 05:38:45,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3204 states, 3203 states have (on average 3.300031220730565) internal successors, (10570), 3203 states have internal predecessors, (10570), 0 states have call successors, (0), 0 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 05:38:45,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3204 states to 3204 states and 10570 transitions. [2022-01-18 05:38:45,515 INFO L78 Accepts]: Start accepts. Automaton has 3204 states and 10570 transitions. Word has length 24 [2022-01-18 05:38:45,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:45,515 INFO L470 AbstractCegarLoop]: Abstraction has 3204 states and 10570 transitions. [2022-01-18 05:38:45,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:38:45,515 INFO L276 IsEmpty]: Start isEmpty. Operand 3204 states and 10570 transitions. [2022-01-18 05:38:45,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:38:45,519 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:45,519 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:38:45,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Ended with exit code 0 [2022-01-18 05:38:45,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2022-01-18 05:38:45,720 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:38:45,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:45,720 INFO L85 PathProgramCache]: Analyzing trace with hash 957307057, now seen corresponding path program 30 times [2022-01-18 05:38:45,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:45,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172675116] [2022-01-18 05:38:45,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:45,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:45,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:45,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172675116] [2022-01-18 05:38:45,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172675116] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:45,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347169577] [2022-01-18 05:38:45,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:38:45,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:45,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:45,935 INFO L229 MonitoredProcess]: Starting monitored process 316 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:38:45,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-01-18 05:38:45,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:38:45,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:38:45,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:38:45,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:46,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:46,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:46,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:46,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:38:46,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2022-01-18 05:38:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:46,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:46,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:46,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:46,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:46,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:46,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2022-01-18 05:38:46,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:46,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347169577] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:46,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:46,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-01-18 05:38:46,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994990175] [2022-01-18 05:38:46,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:46,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:38:46,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:46,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:38:46,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:38:46,936 INFO L87 Difference]: Start difference. First operand 3204 states and 10570 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:38:49,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:49,401 INFO L93 Difference]: Finished difference Result 3968 states and 13051 transitions. [2022-01-18 05:38:49,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 05:38:49,401 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:38:49,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:49,409 INFO L225 Difference]: With dead ends: 3968 [2022-01-18 05:38:49,409 INFO L226 Difference]: Without dead ends: 3956 [2022-01-18 05:38:49,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=654, Invalid=5352, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 05:38:49,410 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 216 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 2220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 779 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:49,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 182 Invalid, 2220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1344 Invalid, 0 Unknown, 779 Unchecked, 0.6s Time] [2022-01-18 05:38:49,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3956 states. [2022-01-18 05:38:49,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3956 to 3212. [2022-01-18 05:38:49,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3212 states, 3211 states have (on average 3.2980379943942695) internal successors, (10590), 3211 states have internal predecessors, (10590), 0 states have call successors, (0), 0 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 05:38:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3212 states to 3212 states and 10590 transitions. [2022-01-18 05:38:49,471 INFO L78 Accepts]: Start accepts. Automaton has 3212 states and 10590 transitions. Word has length 24 [2022-01-18 05:38:49,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:49,471 INFO L470 AbstractCegarLoop]: Abstraction has 3212 states and 10590 transitions. [2022-01-18 05:38:49,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:38:49,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3212 states and 10590 transitions. [2022-01-18 05:38:49,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:38:49,476 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:49,476 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:38:49,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Ended with exit code 0 [2022-01-18 05:38:49,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2022-01-18 05:38:49,676 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:38:49,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:49,677 INFO L85 PathProgramCache]: Analyzing trace with hash 760793552, now seen corresponding path program 11 times [2022-01-18 05:38:49,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:49,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612320196] [2022-01-18 05:38:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:49,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:49,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:49,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612320196] [2022-01-18 05:38:49,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612320196] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:49,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58352611] [2022-01-18 05:38:49,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:38:49,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:49,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:49,887 INFO L229 MonitoredProcess]: Starting monitored process 317 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:38:49,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-01-18 05:38:49,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:38:49,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:38:49,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:38:49,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:50,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:50,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:50,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:50,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:50,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:38:50,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:50,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:50,420 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:38:50,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:38:50,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:50,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:50,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:50,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:50,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:38:50,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:50,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58352611] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:50,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:50,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:38:50,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464299842] [2022-01-18 05:38:50,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:50,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:38:50,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:50,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:38:50,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:38:50,482 INFO L87 Difference]: Start difference. First operand 3212 states and 10590 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:38:51,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:51,094 INFO L93 Difference]: Finished difference Result 3489 states and 11543 transitions. [2022-01-18 05:38:51,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:38:51,094 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:38:51,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:51,101 INFO L225 Difference]: With dead ends: 3489 [2022-01-18 05:38:51,101 INFO L226 Difference]: Without dead ends: 3487 [2022-01-18 05:38:51,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 05:38:51,101 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 85 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:51,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 126 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 797 Invalid, 0 Unknown, 178 Unchecked, 0.3s Time] [2022-01-18 05:38:51,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3487 states. [2022-01-18 05:38:51,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3487 to 3210. [2022-01-18 05:38:51,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3210 states, 3209 states have (on average 3.298535369273917) internal successors, (10585), 3209 states have internal predecessors, (10585), 0 states have call successors, (0), 0 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 05:38:51,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3210 states to 3210 states and 10585 transitions. [2022-01-18 05:38:51,146 INFO L78 Accepts]: Start accepts. Automaton has 3210 states and 10585 transitions. Word has length 24 [2022-01-18 05:38:51,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:51,146 INFO L470 AbstractCegarLoop]: Abstraction has 3210 states and 10585 transitions. [2022-01-18 05:38:51,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:38:51,146 INFO L276 IsEmpty]: Start isEmpty. Operand 3210 states and 10585 transitions. [2022-01-18 05:38:51,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:38:51,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:51,150 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:38:51,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Forceful destruction successful, exit code 0 [2022-01-18 05:38:51,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:51,351 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:38:51,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:51,351 INFO L85 PathProgramCache]: Analyzing trace with hash 344375695, now seen corresponding path program 31 times [2022-01-18 05:38:51,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:51,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193307106] [2022-01-18 05:38:51,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:51,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:51,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:51,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193307106] [2022-01-18 05:38:51,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193307106] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:51,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085934490] [2022-01-18 05:38:51,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:38:51,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:51,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:51,561 INFO L229 MonitoredProcess]: Starting monitored process 318 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:38:51,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-01-18 05:38:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:51,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:38:51,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:51,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:51,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:51,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:51,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:51,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:38:51,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:51,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:52,090 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:38:52,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:38:52,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:52,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:52,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:52,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:52,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:38:52,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:52,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085934490] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:52,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:52,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:38:52,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108830612] [2022-01-18 05:38:52,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:52,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:38:52,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:52,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:38:52,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:38:52,153 INFO L87 Difference]: Start difference. First operand 3210 states and 10585 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:38:52,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:52,976 INFO L93 Difference]: Finished difference Result 3552 states and 11697 transitions. [2022-01-18 05:38:52,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 05:38:52,977 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:38:52,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:52,983 INFO L225 Difference]: With dead ends: 3552 [2022-01-18 05:38:52,983 INFO L226 Difference]: Without dead ends: 3548 [2022-01-18 05:38:52,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 05:38:52,983 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 104 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 452 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:52,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 128 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1225 Invalid, 0 Unknown, 452 Unchecked, 0.5s Time] [2022-01-18 05:38:52,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2022-01-18 05:38:53,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 3206. [2022-01-18 05:38:53,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3206 states, 3205 states have (on average 3.2998439937597506) internal successors, (10576), 3205 states have internal predecessors, (10576), 0 states have call successors, (0), 0 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 05:38:53,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3206 states to 3206 states and 10576 transitions. [2022-01-18 05:38:53,024 INFO L78 Accepts]: Start accepts. Automaton has 3206 states and 10576 transitions. Word has length 24 [2022-01-18 05:38:53,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:53,024 INFO L470 AbstractCegarLoop]: Abstraction has 3206 states and 10576 transitions. [2022-01-18 05:38:53,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:38:53,024 INFO L276 IsEmpty]: Start isEmpty. Operand 3206 states and 10576 transitions. [2022-01-18 05:38:53,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:38:53,028 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:53,029 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:38:53,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Ended with exit code 0 [2022-01-18 05:38:53,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:53,229 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:38:53,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:53,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1463078768, now seen corresponding path program 12 times [2022-01-18 05:38:53,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:53,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114660280] [2022-01-18 05:38:53,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:53,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:53,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:53,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114660280] [2022-01-18 05:38:53,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114660280] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:53,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129295752] [2022-01-18 05:38:53,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:38:53,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:53,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:53,440 INFO L229 MonitoredProcess]: Starting monitored process 319 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:38:53,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-01-18 05:38:53,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:38:53,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:38:53,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:38:53,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:53,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:53,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:53,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:53,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:38:53,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2022-01-18 05:38:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:53,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:54,176 INFO L387 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 9 treesize of output 5 [2022-01-18 05:38:54,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:54,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129295752] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:54,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:54,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-01-18 05:38:54,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424227006] [2022-01-18 05:38:54,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:54,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:38:54,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:54,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:38:54,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:38:54,190 INFO L87 Difference]: Start difference. First operand 3206 states and 10576 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:38:57,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:57,192 INFO L93 Difference]: Finished difference Result 3981 states and 13140 transitions. [2022-01-18 05:38:57,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 05:38:57,192 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:38:57,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:57,212 INFO L225 Difference]: With dead ends: 3981 [2022-01-18 05:38:57,212 INFO L226 Difference]: Without dead ends: 3977 [2022-01-18 05:38:57,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2049 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=812, Invalid=6844, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 05:38:57,212 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 260 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 2143 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 3206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 2143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 929 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:57,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 151 Invalid, 3206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 2143 Invalid, 0 Unknown, 929 Unchecked, 0.8s Time] [2022-01-18 05:38:57,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3977 states. [2022-01-18 05:38:57,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3977 to 3203. [2022-01-18 05:38:57,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 3.3004372267332918) internal successors, (10568), 3202 states have internal predecessors, (10568), 0 states have call successors, (0), 0 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 05:38:57,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 10568 transitions. [2022-01-18 05:38:57,253 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 10568 transitions. Word has length 24 [2022-01-18 05:38:57,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:57,253 INFO L470 AbstractCegarLoop]: Abstraction has 3203 states and 10568 transitions. [2022-01-18 05:38:57,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:38:57,253 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 10568 transitions. [2022-01-18 05:38:57,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:38:57,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:57,257 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:38:57,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Ended with exit code 0 [2022-01-18 05:38:57,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:57,458 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:38:57,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:57,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1554115117, now seen corresponding path program 32 times [2022-01-18 05:38:57,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:57,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128194052] [2022-01-18 05:38:57,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:57,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:38:57,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:57,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:38:57,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128194052] [2022-01-18 05:38:57,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128194052] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:38:57,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631170896] [2022-01-18 05:38:57,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:38:57,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:57,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:38:57,685 INFO L229 MonitoredProcess]: Starting monitored process 320 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:38:57,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-01-18 05:38:57,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:38:57,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:38:57,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:38:57,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:38:57,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:57,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:38:57,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:57,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:38:57,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 05:38:58,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:58,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:38:58,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:58,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:38:58,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:38:58,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:38:58,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:38:58,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631170896] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:38:58,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:38:58,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:38:58,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611854344] [2022-01-18 05:38:58,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:38:58,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:38:58,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:38:58,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:38:58,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:38:58,685 INFO L87 Difference]: Start difference. First operand 3203 states and 10568 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:38:59,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:38:59,595 INFO L93 Difference]: Finished difference Result 3784 states and 12633 transitions. [2022-01-18 05:38:59,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 05:38:59,596 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:38:59,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:38:59,602 INFO L225 Difference]: With dead ends: 3784 [2022-01-18 05:38:59,602 INFO L226 Difference]: Without dead ends: 3777 [2022-01-18 05:38:59,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=275, Invalid=1531, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 05:38:59,603 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 79 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 621 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:38:59,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 190 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 584 Invalid, 0 Unknown, 621 Unchecked, 0.3s Time] [2022-01-18 05:38:59,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2022-01-18 05:38:59,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3225. [2022-01-18 05:38:59,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3225 states, 3224 states have (on average 3.2968362282878414) internal successors, (10629), 3224 states have internal predecessors, (10629), 0 states have call successors, (0), 0 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 05:38:59,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 10629 transitions. [2022-01-18 05:38:59,643 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 10629 transitions. Word has length 24 [2022-01-18 05:38:59,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:38:59,643 INFO L470 AbstractCegarLoop]: Abstraction has 3225 states and 10629 transitions. [2022-01-18 05:38:59,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:38:59,643 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 10629 transitions. [2022-01-18 05:38:59,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:38:59,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:38:59,648 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:38:59,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Forceful destruction successful, exit code 0 [2022-01-18 05:38:59,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,320 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:38:59,848 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:38:59,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:38:59,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1179944853, now seen corresponding path program 33 times [2022-01-18 05:38:59,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:38:59,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238989466] [2022-01-18 05:38:59,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:38:59,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:38:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:39:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:00,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:39:00,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238989466] [2022-01-18 05:39:00,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238989466] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:39:00,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765910344] [2022-01-18 05:39:00,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:39:00,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:39:00,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:39:00,074 INFO L229 MonitoredProcess]: Starting monitored process 321 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:39:00,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-01-18 05:39:00,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:39:00,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:39:00,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:39:00,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:39:00,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:00,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:00,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:00,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:00,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-01-18 05:39:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:00,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:39:00,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:00,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:39:00,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-01-18 05:39:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:00,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765910344] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:39:00,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:39:00,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:39:00,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063642930] [2022-01-18 05:39:00,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:39:00,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:39:00,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:39:00,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:39:00,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:39:00,933 INFO L87 Difference]: Start difference. First operand 3225 states and 10629 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:39:02,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:39:02,371 INFO L93 Difference]: Finished difference Result 3691 states and 12146 transitions. [2022-01-18 05:39:02,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 05:39:02,372 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:39:02,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:39:02,378 INFO L225 Difference]: With dead ends: 3691 [2022-01-18 05:39:02,378 INFO L226 Difference]: Without dead ends: 3685 [2022-01-18 05:39:02,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 32 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=354, Invalid=2508, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 05:39:02,379 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 184 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 2169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 676 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:39:02,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 125 Invalid, 2169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1443 Invalid, 0 Unknown, 676 Unchecked, 0.6s Time] [2022-01-18 05:39:02,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3685 states. [2022-01-18 05:39:02,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3685 to 3217. [2022-01-18 05:39:02,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3217 states, 3216 states have (on average 3.2997512437810945) internal successors, (10612), 3216 states have internal predecessors, (10612), 0 states have call successors, (0), 0 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 05:39:02,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3217 states to 3217 states and 10612 transitions. [2022-01-18 05:39:02,421 INFO L78 Accepts]: Start accepts. Automaton has 3217 states and 10612 transitions. Word has length 24 [2022-01-18 05:39:02,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:39:02,421 INFO L470 AbstractCegarLoop]: Abstraction has 3217 states and 10612 transitions. [2022-01-18 05:39:02,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:39:02,421 INFO L276 IsEmpty]: Start isEmpty. Operand 3217 states and 10612 transitions. [2022-01-18 05:39:02,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:39:02,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:39:02,425 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:39:02,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Forceful destruction successful, exit code 0 [2022-01-18 05:39:02,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2022-01-18 05:39:02,626 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:39:02,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:39:02,626 INFO L85 PathProgramCache]: Analyzing trace with hash 854256491, now seen corresponding path program 34 times [2022-01-18 05:39:02,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:39:02,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537106849] [2022-01-18 05:39:02,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:39:02,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:39:02,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:39:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:02,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:39:02,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537106849] [2022-01-18 05:39:02,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537106849] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:39:02,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489615860] [2022-01-18 05:39:02,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:39:02,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:39:02,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:39:02,847 INFO L229 MonitoredProcess]: Starting monitored process 322 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:39:02,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-01-18 05:39:02,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:39:02,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:39:02,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:39:02,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:39:03,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:03,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:03,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:03,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:03,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2022-01-18 05:39:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:03,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:39:03,341 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:39:03,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:39:03,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:03,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:03,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:03,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:03,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:39:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:03,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489615860] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:39:03,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:39:03,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:39:03,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079467363] [2022-01-18 05:39:03,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:39:03,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:39:03,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:39:03,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:39:03,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:39:03,401 INFO L87 Difference]: Start difference. First operand 3217 states and 10612 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:39:04,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:39:04,142 INFO L93 Difference]: Finished difference Result 3469 states and 11493 transitions. [2022-01-18 05:39:04,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 05:39:04,143 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:39:04,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:39:04,148 INFO L225 Difference]: With dead ends: 3469 [2022-01-18 05:39:04,148 INFO L226 Difference]: Without dead ends: 3463 [2022-01-18 05:39:04,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:39:04,149 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 72 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 539 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:39:04,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 105 Invalid, 1733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1187 Invalid, 0 Unknown, 539 Unchecked, 0.4s Time] [2022-01-18 05:39:04,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3463 states. [2022-01-18 05:39:04,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3463 to 3218. [2022-01-18 05:39:04,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3218 states, 3217 states have (on average 3.2993472179048804) internal successors, (10614), 3217 states have internal predecessors, (10614), 0 states have call successors, (0), 0 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 05:39:04,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3218 states to 3218 states and 10614 transitions. [2022-01-18 05:39:04,186 INFO L78 Accepts]: Start accepts. Automaton has 3218 states and 10614 transitions. Word has length 24 [2022-01-18 05:39:04,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:39:04,186 INFO L470 AbstractCegarLoop]: Abstraction has 3218 states and 10614 transitions. [2022-01-18 05:39:04,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:39:04,186 INFO L276 IsEmpty]: Start isEmpty. Operand 3218 states and 10614 transitions. [2022-01-18 05:39:04,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:39:04,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:39:04,190 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:39:04,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Ended with exit code 0 [2022-01-18 05:39:04,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2022-01-18 05:39:04,391 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:39:04,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:39:04,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1922545167, now seen corresponding path program 35 times [2022-01-18 05:39:04,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:39:04,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774613399] [2022-01-18 05:39:04,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:39:04,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:39:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:39:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:04,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:39:04,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774613399] [2022-01-18 05:39:04,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774613399] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:39:04,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487532988] [2022-01-18 05:39:04,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:39:04,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:39:04,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:39:04,610 INFO L229 MonitoredProcess]: Starting monitored process 323 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:39:04,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-01-18 05:39:04,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:39:04,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:39:04,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:39:04,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:39:04,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:04,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:04,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:04,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:04,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2022-01-18 05:39:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:04,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:39:05,113 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:39:05,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:39:05,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:05,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:05,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:05,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:05,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:39:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:05,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487532988] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:39:05,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:39:05,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:39:05,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724581636] [2022-01-18 05:39:05,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:39:05,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:39:05,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:39:05,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:39:05,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:39:05,182 INFO L87 Difference]: Start difference. First operand 3218 states and 10614 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:39:05,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:39:05,773 INFO L93 Difference]: Finished difference Result 3419 states and 11303 transitions. [2022-01-18 05:39:05,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 05:39:05,773 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:39:05,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:39:05,780 INFO L225 Difference]: With dead ends: 3419 [2022-01-18 05:39:05,780 INFO L226 Difference]: Without dead ends: 3412 [2022-01-18 05:39:05,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 05:39:05,780 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 40 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:39:05,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 93 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1079 Invalid, 0 Unknown, 94 Unchecked, 0.4s Time] [2022-01-18 05:39:05,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3412 states. [2022-01-18 05:39:05,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3412 to 3218. [2022-01-18 05:39:05,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3218 states, 3217 states have (on average 3.2993472179048804) internal successors, (10614), 3217 states have internal predecessors, (10614), 0 states have call successors, (0), 0 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 05:39:05,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3218 states to 3218 states and 10614 transitions. [2022-01-18 05:39:05,821 INFO L78 Accepts]: Start accepts. Automaton has 3218 states and 10614 transitions. Word has length 24 [2022-01-18 05:39:05,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:39:05,821 INFO L470 AbstractCegarLoop]: Abstraction has 3218 states and 10614 transitions. [2022-01-18 05:39:05,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:39:05,821 INFO L276 IsEmpty]: Start isEmpty. Operand 3218 states and 10614 transitions. [2022-01-18 05:39:05,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:39:05,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:39:05,825 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:39:05,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Ended with exit code 0 [2022-01-18 05:39:06,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable333,323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:39:06,026 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:39:06,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:39:06,026 INFO L85 PathProgramCache]: Analyzing trace with hash -49921210, now seen corresponding path program 44 times [2022-01-18 05:39:06,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:39:06,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822568762] [2022-01-18 05:39:06,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:39:06,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:39:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:39:06,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:06,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:39:06,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822568762] [2022-01-18 05:39:06,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822568762] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:39:06,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416423306] [2022-01-18 05:39:06,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:39:06,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:39:06,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:39:06,219 INFO L229 MonitoredProcess]: Starting monitored process 324 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:39:06,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-01-18 05:39:06,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:39:06,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:39:06,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:39:06,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:39:06,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:06,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:06,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:06,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:06,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 05:39:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:06,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:39:07,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:07,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:39:07,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-01-18 05:39:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:07,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416423306] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:39:07,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:39:07,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-01-18 05:39:07,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856801294] [2022-01-18 05:39:07,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:39:07,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:39:07,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:39:07,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:39:07,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:39:07,248 INFO L87 Difference]: Start difference. First operand 3218 states and 10614 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:39:08,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:39:08,248 INFO L93 Difference]: Finished difference Result 3598 states and 11743 transitions. [2022-01-18 05:39:08,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 05:39:08,248 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:39:08,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:39:08,255 INFO L225 Difference]: With dead ends: 3598 [2022-01-18 05:39:08,255 INFO L226 Difference]: Without dead ends: 3590 [2022-01-18 05:39:08,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=265, Invalid=2387, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 05:39:08,256 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 156 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 1918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 824 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:39:08,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 248 Invalid, 1918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1073 Invalid, 0 Unknown, 824 Unchecked, 0.4s Time] [2022-01-18 05:39:08,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3590 states. [2022-01-18 05:39:08,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3590 to 3259. [2022-01-18 05:39:08,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3259 states, 3258 states have (on average 3.2912829957028853) internal successors, (10723), 3258 states have internal predecessors, (10723), 0 states have call successors, (0), 0 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 05:39:08,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3259 states to 3259 states and 10723 transitions. [2022-01-18 05:39:08,300 INFO L78 Accepts]: Start accepts. Automaton has 3259 states and 10723 transitions. Word has length 24 [2022-01-18 05:39:08,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:39:08,300 INFO L470 AbstractCegarLoop]: Abstraction has 3259 states and 10723 transitions. [2022-01-18 05:39:08,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:39:08,300 INFO L276 IsEmpty]: Start isEmpty. Operand 3259 states and 10723 transitions. [2022-01-18 05:39:08,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:39:08,304 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:39:08,304 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:39:08,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Forceful destruction successful, exit code 0 [2022-01-18 05:39:08,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2022-01-18 05:39:08,505 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:39:08,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:39:08,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1325289282, now seen corresponding path program 45 times [2022-01-18 05:39:08,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:39:08,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488607803] [2022-01-18 05:39:08,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:39:08,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:39:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:39:08,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:08,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:39:08,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488607803] [2022-01-18 05:39:08,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488607803] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:39:08,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579754827] [2022-01-18 05:39:08,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:39:08,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:39:08,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:39:08,711 INFO L229 MonitoredProcess]: Starting monitored process 325 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:39:08,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-01-18 05:39:08,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:39:08,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:39:08,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:39:08,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:39:09,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:09,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:09,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:09,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:39:09,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 05:39:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:09,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:39:09,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:09,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:09,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:39:09,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-01-18 05:39:09,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:09,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579754827] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:39:09,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:39:09,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-01-18 05:39:09,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386651647] [2022-01-18 05:39:09,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:39:09,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:39:09,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:39:09,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:39:09,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:39:09,762 INFO L87 Difference]: Start difference. First operand 3259 states and 10723 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:39:12,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:39:12,100 INFO L93 Difference]: Finished difference Result 4362 states and 14643 transitions. [2022-01-18 05:39:12,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 05:39:12,101 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:39:12,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:39:12,108 INFO L225 Difference]: With dead ends: 4362 [2022-01-18 05:39:12,108 INFO L226 Difference]: Without dead ends: 4358 [2022-01-18 05:39:12,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=559, Invalid=4133, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 05:39:12,108 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 158 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 928 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:39:12,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 152 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 660 Invalid, 0 Unknown, 928 Unchecked, 0.3s Time] [2022-01-18 05:39:12,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4358 states. [2022-01-18 05:39:12,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4358 to 3273. [2022-01-18 05:39:12,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3273 states, 3272 states have (on average 3.28820293398533) internal successors, (10759), 3272 states have internal predecessors, (10759), 0 states have call successors, (0), 0 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 05:39:12,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3273 states to 3273 states and 10759 transitions. [2022-01-18 05:39:12,154 INFO L78 Accepts]: Start accepts. Automaton has 3273 states and 10759 transitions. Word has length 24 [2022-01-18 05:39:12,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:39:12,154 INFO L470 AbstractCegarLoop]: Abstraction has 3273 states and 10759 transitions. [2022-01-18 05:39:12,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 05:39:12,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3273 states and 10759 transitions. [2022-01-18 05:39:12,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:39:12,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:39:12,158 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:39:12,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Forceful destruction successful, exit code 0 [2022-01-18 05:39:12,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2022-01-18 05:39:12,359 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:39:12,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:39:12,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1715546686, now seen corresponding path program 46 times [2022-01-18 05:39:12,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:39:12,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340843843] [2022-01-18 05:39:12,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:39:12,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:39:12,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:39:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:12,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:39:12,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340843843] [2022-01-18 05:39:12,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340843843] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:39:12,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071308497] [2022-01-18 05:39:12,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:39:12,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:39:12,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:39:12,550 INFO L229 MonitoredProcess]: Starting monitored process 326 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:39:12,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-01-18 05:39:12,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:39:12,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:39:12,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:39:12,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:39:12,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:12,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:12,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:12,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:12,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:39:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:12,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:39:13,101 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:39:13,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:39:13,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:13,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:13,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:13,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:13,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:39:13,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:13,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071308497] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:39:13,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:39:13,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:39:13,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990090258] [2022-01-18 05:39:13,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:39:13,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:39:13,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:39:13,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:39:13,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:39:13,161 INFO L87 Difference]: Start difference. First operand 3273 states and 10759 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:39:14,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:39:14,216 INFO L93 Difference]: Finished difference Result 3719 states and 12091 transitions. [2022-01-18 05:39:14,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 05:39:14,217 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:39:14,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:39:14,223 INFO L225 Difference]: With dead ends: 3719 [2022-01-18 05:39:14,223 INFO L226 Difference]: Without dead ends: 3713 [2022-01-18 05:39:14,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=208, Invalid=1954, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 05:39:14,224 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 132 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 2362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 829 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:39:14,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 158 Invalid, 2362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1508 Invalid, 0 Unknown, 829 Unchecked, 0.6s Time] [2022-01-18 05:39:14,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3713 states. [2022-01-18 05:39:14,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3713 to 3291. [2022-01-18 05:39:14,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3291 states, 3290 states have (on average 3.286626139817629) internal successors, (10813), 3290 states have internal predecessors, (10813), 0 states have call successors, (0), 0 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 05:39:14,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3291 states to 3291 states and 10813 transitions. [2022-01-18 05:39:14,266 INFO L78 Accepts]: Start accepts. Automaton has 3291 states and 10813 transitions. Word has length 24 [2022-01-18 05:39:14,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:39:14,266 INFO L470 AbstractCegarLoop]: Abstraction has 3291 states and 10813 transitions. [2022-01-18 05:39:14,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:39:14,267 INFO L276 IsEmpty]: Start isEmpty. Operand 3291 states and 10813 transitions. [2022-01-18 05:39:14,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:39:14,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:39:14,271 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:39:14,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Forceful destruction successful, exit code 0 [2022-01-18 05:39:14,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:39:14,471 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:39:14,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:39:14,471 INFO L85 PathProgramCache]: Analyzing trace with hash -516719964, now seen corresponding path program 47 times [2022-01-18 05:39:14,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:39:14,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963496028] [2022-01-18 05:39:14,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:39:14,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:39:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:39:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:14,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:39:14,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963496028] [2022-01-18 05:39:14,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963496028] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:39:14,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516279459] [2022-01-18 05:39:14,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:39:14,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:39:14,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:39:14,662 INFO L229 MonitoredProcess]: Starting monitored process 327 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:39:14,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-01-18 05:39:14,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:39:14,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:39:14,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:39:14,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:39:14,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:14,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:14,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:14,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:14,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:39:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:14,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:39:15,186 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:39:15,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:39:15,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:15,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:15,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:15,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:15,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:39:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:15,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516279459] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:39:15,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:39:15,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 05:39:15,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317638946] [2022-01-18 05:39:15,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:39:15,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:39:15,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:39:15,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:39:15,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:39:15,248 INFO L87 Difference]: Start difference. First operand 3291 states and 10813 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:39:15,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:39:15,922 INFO L93 Difference]: Finished difference Result 3670 states and 11947 transitions. [2022-01-18 05:39:15,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 05:39:15,923 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:39:15,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:39:15,929 INFO L225 Difference]: With dead ends: 3670 [2022-01-18 05:39:15,929 INFO L226 Difference]: Without dead ends: 3664 [2022-01-18 05:39:15,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=183, Invalid=1457, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 05:39:15,930 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 121 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 270 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:39:15,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 104 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 944 Invalid, 0 Unknown, 270 Unchecked, 0.3s Time] [2022-01-18 05:39:15,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3664 states. [2022-01-18 05:39:15,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3664 to 3281. [2022-01-18 05:39:15,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3281 states, 3280 states have (on average 3.2914634146341464) internal successors, (10796), 3280 states have internal predecessors, (10796), 0 states have call successors, (0), 0 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 05:39:15,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3281 states to 3281 states and 10796 transitions. [2022-01-18 05:39:15,995 INFO L78 Accepts]: Start accepts. Automaton has 3281 states and 10796 transitions. Word has length 24 [2022-01-18 05:39:15,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:39:15,995 INFO L470 AbstractCegarLoop]: Abstraction has 3281 states and 10796 transitions. [2022-01-18 05:39:15,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:39:15,995 INFO L276 IsEmpty]: Start isEmpty. Operand 3281 states and 10796 transitions. [2022-01-18 05:39:16,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:39:16,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:39:16,000 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:39:16,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Ended with exit code 0 [2022-01-18 05:39:16,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:39:16,200 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:39:16,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:39:16,201 INFO L85 PathProgramCache]: Analyzing trace with hash -713233469, now seen corresponding path program 8 times [2022-01-18 05:39:16,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:39:16,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363728721] [2022-01-18 05:39:16,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:39:16,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:39:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:39:16,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:16,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:39:16,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363728721] [2022-01-18 05:39:16,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363728721] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:39:16,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811096826] [2022-01-18 05:39:16,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:39:16,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:39:16,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:39:16,393 INFO L229 MonitoredProcess]: Starting monitored process 328 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:39:16,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-01-18 05:39:16,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:39:16,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:39:16,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 05:39:16,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:39:16,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:16,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:16,667 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:39:16,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 50 [2022-01-18 05:39:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:16,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:39:17,662 INFO L387 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 9 treesize of output 5 [2022-01-18 05:39:17,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:17,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811096826] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:39:17,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:39:17,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-01-18 05:39:17,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615972362] [2022-01-18 05:39:17,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:39:17,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 05:39:17,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:39:17,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 05:39:17,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:39:17,676 INFO L87 Difference]: Start difference. First operand 3281 states and 10796 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:39:19,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:39:19,107 INFO L93 Difference]: Finished difference Result 4052 states and 13402 transitions. [2022-01-18 05:39:19,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 05:39:19,107 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:39:19,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:39:19,114 INFO L225 Difference]: With dead ends: 4052 [2022-01-18 05:39:19,114 INFO L226 Difference]: Without dead ends: 4046 [2022-01-18 05:39:19,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 27 SyntacticMatches, 12 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=400, Invalid=3140, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 05:39:19,114 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 216 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 2370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1028 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:39:19,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 122 Invalid, 2370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1267 Invalid, 0 Unknown, 1028 Unchecked, 0.5s Time] [2022-01-18 05:39:19,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4046 states. [2022-01-18 05:39:19,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4046 to 3254. [2022-01-18 05:39:19,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3254 states, 3253 states have (on average 3.294189978481402) internal successors, (10716), 3253 states have internal predecessors, (10716), 0 states have call successors, (0), 0 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 05:39:19,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3254 states to 3254 states and 10716 transitions. [2022-01-18 05:39:19,159 INFO L78 Accepts]: Start accepts. Automaton has 3254 states and 10716 transitions. Word has length 24 [2022-01-18 05:39:19,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:39:19,159 INFO L470 AbstractCegarLoop]: Abstraction has 3254 states and 10716 transitions. [2022-01-18 05:39:19,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:39:19,159 INFO L276 IsEmpty]: Start isEmpty. Operand 3254 states and 10716 transitions. [2022-01-18 05:39:19,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:39:19,163 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:39:19,163 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:39:19,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Ended with exit code 0 [2022-01-18 05:39:19,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 328 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2022-01-18 05:39:19,364 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:39:19,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:39:19,364 INFO L85 PathProgramCache]: Analyzing trace with hash -343324217, now seen corresponding path program 36 times [2022-01-18 05:39:19,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:39:19,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844516678] [2022-01-18 05:39:19,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:39:19,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:39:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:39:19,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:19,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:39:19,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844516678] [2022-01-18 05:39:19,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844516678] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:39:19,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542974559] [2022-01-18 05:39:19,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:39:19,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:39:19,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:39:19,555 INFO L229 MonitoredProcess]: Starting monitored process 329 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:39:19,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-01-18 05:39:19,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:39:19,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:39:19,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:39:19,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:39:19,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:19,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:19,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:19,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:19,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 05:39:19,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:19,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:39:20,123 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:39:20,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:39:20,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:20,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:20,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:20,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:20,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:39:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:20,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542974559] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:39:20,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:39:20,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:39:20,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95954585] [2022-01-18 05:39:20,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:39:20,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:39:20,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:39:20,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:39:20,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:39:20,185 INFO L87 Difference]: Start difference. First operand 3254 states and 10716 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:39:21,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:39:21,402 INFO L93 Difference]: Finished difference Result 3606 states and 11784 transitions. [2022-01-18 05:39:21,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 05:39:21,402 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:39:21,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:39:21,408 INFO L225 Difference]: With dead ends: 3606 [2022-01-18 05:39:21,408 INFO L226 Difference]: Without dead ends: 3596 [2022-01-18 05:39:21,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=219, Invalid=2133, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 05:39:21,409 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 124 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1526 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:39:21,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 158 Invalid, 1803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1526 Invalid, 0 Unknown, 247 Unchecked, 0.6s Time] [2022-01-18 05:39:21,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3596 states. [2022-01-18 05:39:21,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3596 to 3259. [2022-01-18 05:39:21,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3259 states, 3258 states have (on average 3.2934315531000613) internal successors, (10730), 3258 states have internal predecessors, (10730), 0 states have call successors, (0), 0 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 05:39:21,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3259 states to 3259 states and 10730 transitions. [2022-01-18 05:39:21,451 INFO L78 Accepts]: Start accepts. Automaton has 3259 states and 10730 transitions. Word has length 24 [2022-01-18 05:39:21,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:39:21,451 INFO L470 AbstractCegarLoop]: Abstraction has 3259 states and 10730 transitions. [2022-01-18 05:39:21,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:39:21,451 INFO L276 IsEmpty]: Start isEmpty. Operand 3259 states and 10730 transitions. [2022-01-18 05:39:21,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:39:21,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:39:21,455 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:39:21,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Forceful destruction successful, exit code 0 [2022-01-18 05:39:21,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,329 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:39:21,656 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:39:21,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:39:21,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1607769791, now seen corresponding path program 37 times [2022-01-18 05:39:21,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:39:21,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962583682] [2022-01-18 05:39:21,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:39:21,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:39:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:39:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:21,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:39:21,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962583682] [2022-01-18 05:39:21,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962583682] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:39:21,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007198015] [2022-01-18 05:39:21,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:39:21,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:39:21,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:39:21,854 INFO L229 MonitoredProcess]: Starting monitored process 330 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:39:21,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-01-18 05:39:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:39:21,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:39:21,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:39:22,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:22,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:22,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:22,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:22,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:39:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:22,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:39:22,413 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:39:22,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:39:22,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:22,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:22,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:22,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:22,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:39:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:22,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007198015] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:39:22,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:39:22,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:39:22,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570112894] [2022-01-18 05:39:22,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:39:22,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:39:22,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:39:22,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:39:22,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:39:22,469 INFO L87 Difference]: Start difference. First operand 3259 states and 10730 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:39:23,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:39:23,702 INFO L93 Difference]: Finished difference Result 3625 states and 11830 transitions. [2022-01-18 05:39:23,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 05:39:23,702 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:39:23,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:39:23,708 INFO L225 Difference]: With dead ends: 3625 [2022-01-18 05:39:23,708 INFO L226 Difference]: Without dead ends: 3619 [2022-01-18 05:39:23,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=249, Invalid=2301, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 05:39:23,708 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 153 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 691 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:39:23,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 151 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1475 Invalid, 0 Unknown, 691 Unchecked, 0.5s Time] [2022-01-18 05:39:23,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2022-01-18 05:39:23,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 3261. [2022-01-18 05:39:23,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3261 states, 3260 states have (on average 3.2932515337423314) internal successors, (10736), 3260 states have internal predecessors, (10736), 0 states have call successors, (0), 0 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 05:39:23,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3261 states to 3261 states and 10736 transitions. [2022-01-18 05:39:23,751 INFO L78 Accepts]: Start accepts. Automaton has 3261 states and 10736 transitions. Word has length 24 [2022-01-18 05:39:23,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:39:23,751 INFO L470 AbstractCegarLoop]: Abstraction has 3261 states and 10736 transitions. [2022-01-18 05:39:23,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:39:23,751 INFO L276 IsEmpty]: Start isEmpty. Operand 3261 states and 10736 transitions. [2022-01-18 05:39:23,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:39:23,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:39:23,756 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:39:23,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Ended with exit code 0 [2022-01-18 05:39:23,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,330 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:39:23,956 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:39:23,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:39:23,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1031886275, now seen corresponding path program 38 times [2022-01-18 05:39:23,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:39:23,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029515652] [2022-01-18 05:39:23,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:39:23,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:39:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:39:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:24,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:39:24,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029515652] [2022-01-18 05:39:24,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029515652] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:39:24,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783847038] [2022-01-18 05:39:24,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:39:24,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:39:24,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:39:24,149 INFO L229 MonitoredProcess]: Starting monitored process 331 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:39:24,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-01-18 05:39:24,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:39:24,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:39:24,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:39:24,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:39:24,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:24,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:24,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:24,493 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:39:24,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 51 [2022-01-18 05:39:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:24,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:39:25,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:25,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:25,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:25,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:25,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2022-01-18 05:39:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:25,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783847038] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:39:25,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:39:25,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-01-18 05:39:25,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007707264] [2022-01-18 05:39:25,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:39:25,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 05:39:25,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:39:25,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 05:39:25,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:39:25,137 INFO L87 Difference]: Start difference. First operand 3261 states and 10736 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:39:27,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:39:27,027 INFO L93 Difference]: Finished difference Result 3822 states and 12607 transitions. [2022-01-18 05:39:27,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 05:39:27,027 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:39:27,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:39:27,034 INFO L225 Difference]: With dead ends: 3822 [2022-01-18 05:39:27,034 INFO L226 Difference]: Without dead ends: 3818 [2022-01-18 05:39:27,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=404, Invalid=3756, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 05:39:27,034 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 142 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 2046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 653 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:39:27,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 191 Invalid, 2046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1351 Invalid, 0 Unknown, 653 Unchecked, 0.5s Time] [2022-01-18 05:39:27,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3818 states. [2022-01-18 05:39:27,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3818 to 3266. [2022-01-18 05:39:27,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3266 states, 3265 states have (on average 3.292802450229709) internal successors, (10751), 3265 states have internal predecessors, (10751), 0 states have call successors, (0), 0 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 05:39:27,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 10751 transitions. [2022-01-18 05:39:27,078 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 10751 transitions. Word has length 24 [2022-01-18 05:39:27,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:39:27,078 INFO L470 AbstractCegarLoop]: Abstraction has 3266 states and 10751 transitions. [2022-01-18 05:39:27,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:39:27,078 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 10751 transitions. [2022-01-18 05:39:27,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:39:27,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:39:27,083 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:39:27,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Ended with exit code 0 [2022-01-18 05:39:27,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,331 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:39:27,283 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:39:27,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:39:27,283 INFO L85 PathProgramCache]: Analyzing trace with hash -765065084, now seen corresponding path program 13 times [2022-01-18 05:39:27,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:39:27,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114787763] [2022-01-18 05:39:27,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:39:27,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:39:27,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:39:27,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:27,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:39:27,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114787763] [2022-01-18 05:39:27,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114787763] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:39:27,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498320474] [2022-01-18 05:39:27,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:39:27,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:39:27,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:39:27,481 INFO L229 MonitoredProcess]: Starting monitored process 332 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:39:27,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-01-18 05:39:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:39:27,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:39:27,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:39:27,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:27,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:27,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:27,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:27,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 05:39:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:27,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:39:28,040 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-01-18 05:39:28,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-01-18 05:39:28,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:28,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:28,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:28,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:28,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-01-18 05:39:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:28,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498320474] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:39:28,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:39:28,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 05:39:28,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280212667] [2022-01-18 05:39:28,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:39:28,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:39:28,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:39:28,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:39:28,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:39:28,108 INFO L87 Difference]: Start difference. First operand 3266 states and 10751 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:39:28,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:39:28,990 INFO L93 Difference]: Finished difference Result 3600 states and 11744 transitions. [2022-01-18 05:39:28,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 05:39:28,990 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:39:28,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:39:28,997 INFO L225 Difference]: With dead ends: 3600 [2022-01-18 05:39:28,997 INFO L226 Difference]: Without dead ends: 3594 [2022-01-18 05:39:28,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=1629, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 05:39:28,997 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 126 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 1879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 599 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:39:28,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 169 Invalid, 1879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1260 Invalid, 0 Unknown, 599 Unchecked, 0.5s Time] [2022-01-18 05:39:29,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3594 states. [2022-01-18 05:39:29,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3594 to 3269. [2022-01-18 05:39:29,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3269 states, 3268 states have (on average 3.292533659730722) internal successors, (10760), 3268 states have internal predecessors, (10760), 0 states have call successors, (0), 0 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 05:39:29,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3269 states to 3269 states and 10760 transitions. [2022-01-18 05:39:29,039 INFO L78 Accepts]: Start accepts. Automaton has 3269 states and 10760 transitions. Word has length 24 [2022-01-18 05:39:29,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:39:29,039 INFO L470 AbstractCegarLoop]: Abstraction has 3269 states and 10760 transitions. [2022-01-18 05:39:29,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:39:29,039 INFO L276 IsEmpty]: Start isEmpty. Operand 3269 states and 10760 transitions. [2022-01-18 05:39:29,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:39:29,043 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:39:29,043 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:39:29,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Ended with exit code 0 [2022-01-18 05:39:29,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable342,332 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:39:29,244 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-01-18 05:39:29,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:39:29,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1986114683, now seen corresponding path program 39 times [2022-01-18 05:39:29,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:39:29,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169573859] [2022-01-18 05:39:29,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:39:29,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:39:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:39:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:29,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:39:29,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169573859] [2022-01-18 05:39:29,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169573859] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:39:29,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332802922] [2022-01-18 05:39:29,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:39:29,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:39:29,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:39:29,440 INFO L229 MonitoredProcess]: Starting monitored process 333 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:39:29,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-01-18 05:39:29,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:39:29,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:39:29,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 05:39:29,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:39:29,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:29,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 05:39:29,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:29,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:29,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 05:39:29,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:29,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:39:30,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:39:30,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:39:30,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-01-18 05:39:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:39:30,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332802922] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:39:30,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:39:30,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 05:39:30,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970132170] [2022-01-18 05:39:30,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:39:30,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 05:39:30,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:39:30,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 05:39:30,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:39:30,307 INFO L87 Difference]: Start difference. First operand 3269 states and 10760 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:39:30,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:39:30,979 INFO L93 Difference]: Finished difference Result 3610 states and 11808 transitions. [2022-01-18 05:39:30,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 05:39:30,979 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 05:39:30,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:39:30,985 INFO L225 Difference]: With dead ends: 3610 [2022-01-18 05:39:30,985 INFO L226 Difference]: Without dead ends: 3604 [2022-01-18 05:39:30,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 05:39:30,986 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 863 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:39:30,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 154 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 973 Invalid, 0 Unknown, 863 Unchecked, 0.3s Time] [2022-01-18 05:39:30,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3604 states. [2022-01-18 05:39:31,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3604 to 3261. [2022-01-18 05:39:31,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3261 states, 3260 states have (on average 3.2932515337423314) internal successors, (10736), 3260 states have internal predecessors, (10736), 0 states have call successors, (0), 0 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 05:39:31,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3261 states to 3261 states and 10736 transitions. [2022-01-18 05:39:31,027 INFO L78 Accepts]: Start accepts. Automaton has 3261 states and 10736 transitions. Word has length 24 [2022-01-18 05:39:31,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:39:31,027 INFO L470 AbstractCegarLoop]: Abstraction has 3261 states and 10736 transitions. [2022-01-18 05:39:31,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 05:39:31,027 INFO L276 IsEmpty]: Start isEmpty. Operand 3261 states and 10736 transitions. [2022-01-18 05:39:31,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 05:39:31,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:39:31,032 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:39:31,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Ended with exit code 0 Received shutdown request... [2022-01-18 05:39:31,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2022-01-18 05:39:31,232 WARN L594 AbstractCegarLoop]: Verification canceled: while executing BasicCegarLoop. [2022-01-18 05:39:31,233 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 05:39:31,234 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4INUSE_VIOLATION (6 of 7 remaining) [2022-01-18 05:39:31,234 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5INUSE_VIOLATION (5 of 7 remaining) [2022-01-18 05:39:31,234 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (4 of 7 remaining) [2022-01-18 05:39:31,235 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (3 of 7 remaining) [2022-01-18 05:39:31,235 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION (2 of 7 remaining) [2022-01-18 05:39:31,235 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Thread1of1ForFork0Err0INUSE_VIOLATION (1 of 7 remaining) [2022-01-18 05:39:31,235 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Thread1of1ForFork0Err1INUSE_VIOLATION (0 of 7 remaining) [2022-01-18 05:39:31,237 INFO L732 BasicCegarLoop]: Path program histogram: [145, 47, 39, 25, 25, 21, 13, 8, 6, 6, 3, 2, 2, 1, 1] [2022-01-18 05:39:31,240 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 05:39:31,240 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 05:39:31,242 INFO L202 PluginConnector]: Adding new model parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 05:39:31 BasicIcfg [2022-01-18 05:39:31,242 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 05:39:31,242 INFO L158 Benchmark]: Toolchain (without parser) took 792026.41ms. Allocated memory was 402.7MB in the beginning and 568.3MB in the end (delta: 165.7MB). Free memory was 362.8MB in the beginning and 418.8MB in the end (delta: -55.9MB). Peak memory consumption was 111.7MB. Max. memory is 16.0GB. [2022-01-18 05:39:31,242 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 402.7MB. Free memory is still 364.0MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 05:39:31,242 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.89ms. Allocated memory is still 402.7MB. Free memory was 362.8MB in the beginning and 361.2MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2022-01-18 05:39:31,242 INFO L158 Benchmark]: Boogie Preprocessor took 15.04ms. Allocated memory is still 402.7MB. Free memory was 361.2MB in the beginning and 360.3MB in the end (delta: 948.3kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 05:39:31,242 INFO L158 Benchmark]: RCFGBuilder took 225.08ms. Allocated memory is still 402.7MB. Free memory was 360.2MB in the beginning and 349.9MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 05:39:31,242 INFO L158 Benchmark]: TraceAbstraction took 791763.77ms. Allocated memory was 402.7MB in the beginning and 568.3MB in the end (delta: 165.7MB). Free memory was 349.4MB in the beginning and 418.8MB in the end (delta: -69.4MB). Peak memory consumption was 97.0MB. Max. memory is 16.0GB. [2022-01-18 05:39:31,242 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 0.11ms. Allocated memory is still 402.7MB. Free memory is still 364.0MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 17.89ms. Allocated memory is still 402.7MB. Free memory was 362.8MB in the beginning and 361.2MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 15.04ms. Allocated memory is still 402.7MB. Free memory was 361.2MB in the beginning and 360.3MB in the end (delta: 948.3kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 225.08ms. Allocated memory is still 402.7MB. Free memory was 360.2MB in the beginning and 349.9MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 791763.77ms. Allocated memory was 402.7MB in the beginning and 568.3MB in the end (delta: 165.7MB). Free memory was 349.4MB in the beginning and 418.8MB in the end (delta: -69.4MB). Peak memory consumption was 97.0MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing BasicCegarLoop. - TimeoutResultAtElement [Line: 54]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing BasicCegarLoop. - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing BasicCegarLoop. - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing BasicCegarLoop. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing BasicCegarLoop. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing BasicCegarLoop. - TimeoutResultAtElement [Line: 54]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing BasicCegarLoop. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 49 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 791.6s, OverallIterations: 344, TraceHistogramMax: 2, PathProgramHistogramMax: 145, EmptinessCheckTime: 0.8s, AutomataDifference: 431.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 53129 SdHoareTripleChecker+Valid, 160.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 53129 mSDsluCounter, 49715 SdHoareTripleChecker+Invalid, 135.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 201871 IncrementalHoareTripleChecker+Unchecked, 276821 mSDsCounter, 14089 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 412990 IncrementalHoareTripleChecker+Invalid, 628950 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14089 mSolverCounterUnsat, 4247 mSDtfsCounter, 412990 mSolverCounterSat, 1.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 27229 GetRequests, 10224 SyntacticMatches, 1727 SemanticMatches, 15278 ConstructedPredicates, 0 IntricatePredicates, 90 DeprecatedPredicates, 205873 ImplicationChecksByTransitivity, 380.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3291occurred in iteration=337, InterpolantAutomatonStates: 12066, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 9.1s AutomataMinimizationTime, 344 MinimizatonAttempts, 202255 StatesRemovedByMinimization, 343 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 273.3s InterpolantComputationTime, 15548 NumberOfCodeBlocks, 15548 NumberOfCodeBlocksAsserted, 1056 NumberOfCheckSat, 22208 ConstructedInterpolants, 3452 QuantifiedInterpolants, 404301 SizeOfPredicates, 3081 NumberOfNonLiveVariables, 26838 ConjunctsInSsa, 9500 ConjunctsInUnsatCore, 1008 InterpolantComputations, 12 PerfectInterpolantSequences, 238/6004 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown