/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/popl20/simple-array-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 06:09:43,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 06:09:43,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 06:09:43,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-18 06:09:43,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-18 06:09:43,936 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-18 06:09:43,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-18 06:09:43,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-18 06:09:43,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-18 06:09:43,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-18 06:09:43,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-18 06:09:43,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-01-18 06:09:43,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 06:09:43,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 06:09:43,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 06:09:43,965 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 06:09:43,979 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 06:09:43,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 06:09:43,980 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 06:09:43,980 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 06:09:43,980 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 06:09:43,981 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 06:09:43,981 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 06:09:43,981 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 06:09:43,981 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 06:09:43,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 06:09:43,981 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 06:09:43,982 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 06:09:43,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 06:09:43,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 06:09:43,982 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 06:09:43,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 06:09:43,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 06:09:43,982 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 06:09:43,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 06:09:43,982 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 06:09:43,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 06:09:43,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 06:09:43,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 06:09:43,985 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 06:09:43,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 06:09:43,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 06:09:43,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 06:09:43,985 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 06:09:43,985 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 06:09:43,986 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 06:09:43,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 06:09:43,986 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 06:09:43,986 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 06:09:43,986 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 06:09:44,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 06:09:44,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 06:09:44,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 06:09:44,168 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 06:09:44,169 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 06:09:44,170 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-array-sum.wvr.bpl [2022-01-18 06:09:44,170 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-array-sum.wvr.bpl' [2022-01-18 06:09:44,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 06:09:44,191 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 06:09:44,192 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 06:09:44,192 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 06:09:44,192 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 06:09:44,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:09:44" (1/1) ... [2022-01-18 06:09:44,204 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:09:44" (1/1) ... [2022-01-18 06:09:44,208 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 06:09:44,210 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 06:09:44,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 06:09:44,211 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 06:09:44,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 06:09:44,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:09:44" (1/1) ... [2022-01-18 06:09:44,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:09:44" (1/1) ... [2022-01-18 06:09:44,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:09:44" (1/1) ... [2022-01-18 06:09:44,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:09:44" (1/1) ... [2022-01-18 06:09:44,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:09:44" (1/1) ... [2022-01-18 06:09:44,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:09:44" (1/1) ... [2022-01-18 06:09:44,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:09:44" (1/1) ... [2022-01-18 06:09:44,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 06:09:44,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 06:09:44,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 06:09:44,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 06:09:44,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:09:44" (1/1) ... [2022-01-18 06:09:44,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 06:09:44,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:44,253 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 06:09:44,259 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 06:09:44,281 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 06:09:44,281 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 06:09:44,281 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 06:09:44,281 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 06:09:44,281 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 06:09:44,282 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 06:09:44,282 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 06:09:44,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 06:09:44,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 06:09:44,282 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 06:09:44,282 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 06:09:44,282 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 06:09:44,282 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 06:09:44,322 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 06:09:44,323 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 06:09:44,456 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 06:09:44,466 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 06:09:44,466 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 06:09:44,468 INFO L202 PluginConnector]: Adding new model simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 06:09:44 BoogieIcfgContainer [2022-01-18 06:09:44,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 06:09:44,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 06:09:44,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 06:09:44,492 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 06:09:44,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:09:44" (1/2) ... [2022-01-18 06:09:44,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab3a10d and model type simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 06:09:44, skipping insertion in model container [2022-01-18 06:09:44,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 06:09:44" (2/2) ... [2022-01-18 06:09:44,509 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-array-sum.wvr.bpl [2022-01-18 06:09:44,512 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 06:09:44,512 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 06:09:44,512 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 06:09:44,512 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 06:09:44,561 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 06:09:44,611 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 06:09:44,618 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 06:09:44,618 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 06:09:44,629 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 29 transitions, 82 flow [2022-01-18 06:09:44,672 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:44,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:44,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 06:09:44,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:44,686 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:09:44,687 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:09:44,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:44,691 INFO L85 PathProgramCache]: Analyzing trace with hash 437584313, now seen corresponding path program 1 times [2022-01-18 06:09:44,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:44,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760658671] [2022-01-18 06:09:44,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:44,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:44,901 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 06:09:44,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:44,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760658671] [2022-01-18 06:09:44,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760658671] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:09:44,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:09:44,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 06:09:44,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831462116] [2022-01-18 06:09:44,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:09:44,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 06:09:44,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:44,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 06:09:44,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 06:09:44,940 INFO L87 Difference]: Start difference. First operand has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 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 5 states, 5 states have (on average 3.2) 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 06:09:45,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:45,086 INFO L93 Difference]: Finished difference Result 257 states and 781 transitions. [2022-01-18 06:09:45,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 06:09:45,098 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) 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 06:09:45,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:45,110 INFO L225 Difference]: With dead ends: 257 [2022-01-18 06:09:45,121 INFO L226 Difference]: Without dead ends: 230 [2022-01-18 06:09:45,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:09:45,128 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 41 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:45,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 35 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:09:45,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-18 06:09:45,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 188. [2022-01-18 06:09:45,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 3.0802139037433154) internal successors, (576), 187 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:45,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 576 transitions. [2022-01-18 06:09:45,173 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 576 transitions. Word has length 16 [2022-01-18 06:09:45,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:45,174 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 576 transitions. [2022-01-18 06:09:45,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) 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 06:09:45,174 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 576 transitions. [2022-01-18 06:09:45,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 06:09:45,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:45,176 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 06:09:45,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 06:09:45,177 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:09:45,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:45,177 INFO L85 PathProgramCache]: Analyzing trace with hash -760695079, now seen corresponding path program 1 times [2022-01-18 06:09:45,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:45,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834765082] [2022-01-18 06:09:45,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:45,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:45,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:45,229 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 06:09:45,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:45,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834765082] [2022-01-18 06:09:45,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834765082] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:45,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123308856] [2022-01-18 06:09:45,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:45,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:45,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:45,232 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 06:09:45,246 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 06:09:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:45,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 06:09:45,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:45,362 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 06:09:45,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:45,414 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 06:09:45,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123308856] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:45,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:45,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-01-18 06:09:45,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867287201] [2022-01-18 06:09:45,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:45,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 06:09:45,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:45,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 06:09:45,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 06:09:45,423 INFO L87 Difference]: Start difference. First operand 188 states and 576 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:45,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:45,522 INFO L93 Difference]: Finished difference Result 376 states and 1113 transitions. [2022-01-18 06:09:45,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 06:09:45,522 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 06:09:45,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:45,524 INFO L225 Difference]: With dead ends: 376 [2022-01-18 06:09:45,524 INFO L226 Difference]: Without dead ends: 376 [2022-01-18 06:09:45,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:09:45,525 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 77 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:45,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 36 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:09:45,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-01-18 06:09:45,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 181. [2022-01-18 06:09:45,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 3.077777777777778) internal successors, (554), 180 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:45,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 554 transitions. [2022-01-18 06:09:45,548 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 554 transitions. Word has length 18 [2022-01-18 06:09:45,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:45,549 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 554 transitions. [2022-01-18 06:09:45,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:45,549 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 554 transitions. [2022-01-18 06:09:45,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 06:09:45,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:45,550 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 06:09:45,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-18 06:09:45,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:45,757 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:09:45,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:45,757 INFO L85 PathProgramCache]: Analyzing trace with hash 663812563, now seen corresponding path program 2 times [2022-01-18 06:09:45,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:45,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562133621] [2022-01-18 06:09:45,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:45,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:45,779 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 06:09:45,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:45,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562133621] [2022-01-18 06:09:45,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562133621] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:09:45,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:09:45,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 06:09:45,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339198381] [2022-01-18 06:09:45,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:09:45,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 06:09:45,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:45,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 06:09:45,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 06:09:45,781 INFO L87 Difference]: Start difference. First operand 181 states and 554 transitions. Second operand has 4 states, 4 states have (on average 4.5) 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 06:09:45,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:45,835 INFO L93 Difference]: Finished difference Result 221 states and 644 transitions. [2022-01-18 06:09:45,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 06:09:45,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) 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 06:09:45,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:45,836 INFO L225 Difference]: With dead ends: 221 [2022-01-18 06:09:45,836 INFO L226 Difference]: Without dead ends: 190 [2022-01-18 06:09:45,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 06:09:45,839 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:45,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 21 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:09:45,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-01-18 06:09:45,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 169. [2022-01-18 06:09:45,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 3.0297619047619047) internal successors, (509), 168 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:45,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 509 transitions. [2022-01-18 06:09:45,851 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 509 transitions. Word has length 18 [2022-01-18 06:09:45,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:45,851 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 509 transitions. [2022-01-18 06:09:45,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) 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 06:09:45,851 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 509 transitions. [2022-01-18 06:09:45,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 06:09:45,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:45,856 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:09:45,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 06:09:45,856 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:09:45,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:45,861 INFO L85 PathProgramCache]: Analyzing trace with hash 132805511, now seen corresponding path program 1 times [2022-01-18 06:09:45,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:45,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594995413] [2022-01-18 06:09:45,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:45,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:45,877 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 06:09:45,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:45,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594995413] [2022-01-18 06:09:45,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594995413] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:09:45,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:09:45,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 06:09:45,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406983977] [2022-01-18 06:09:45,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:09:45,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 06:09:45,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:45,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 06:09:45,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 06:09:45,879 INFO L87 Difference]: Start difference. First operand 169 states and 509 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:45,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:45,895 INFO L93 Difference]: Finished difference Result 239 states and 717 transitions. [2022-01-18 06:09:45,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 06:09:45,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 06:09:45,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:45,897 INFO L225 Difference]: With dead ends: 239 [2022-01-18 06:09:45,897 INFO L226 Difference]: Without dead ends: 203 [2022-01-18 06:09:45,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 06:09:45,898 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:45,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 22 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:09:45,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-18 06:09:45,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-01-18 06:09:45,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 3.0247524752475248) internal successors, (611), 202 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:45,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 611 transitions. [2022-01-18 06:09:45,904 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 611 transitions. Word has length 19 [2022-01-18 06:09:45,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:45,904 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 611 transitions. [2022-01-18 06:09:45,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:45,904 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 611 transitions. [2022-01-18 06:09:45,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 06:09:45,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:45,905 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, 1] [2022-01-18 06:09:45,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 06:09:45,905 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:09:45,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:45,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1705332901, now seen corresponding path program 1 times [2022-01-18 06:09:45,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:45,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426271177] [2022-01-18 06:09:45,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:45,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:45,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:45,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:45,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426271177] [2022-01-18 06:09:45,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426271177] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:45,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580353826] [2022-01-18 06:09:45,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:45,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:45,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:45,983 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 06:09:45,984 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 06:09:46,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:46,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 06:09:46,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:46,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:46,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580353826] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:46,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:46,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-01-18 06:09:46,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295511702] [2022-01-18 06:09:46,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:46,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 06:09:46,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:46,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 06:09:46,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 06:09:46,118 INFO L87 Difference]: Start difference. First operand 203 states and 611 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:46,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:46,181 INFO L93 Difference]: Finished difference Result 263 states and 798 transitions. [2022-01-18 06:09:46,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 06:09:46,181 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 06:09:46,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:46,183 INFO L225 Difference]: With dead ends: 263 [2022-01-18 06:09:46,183 INFO L226 Difference]: Without dead ends: 263 [2022-01-18 06:09:46,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:09:46,184 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 27 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:46,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 30 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:09:46,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-01-18 06:09:46,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 215. [2022-01-18 06:09:46,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0233644859813085) internal successors, (647), 214 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:46,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 647 transitions. [2022-01-18 06:09:46,190 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 647 transitions. Word has length 21 [2022-01-18 06:09:46,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:46,190 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 647 transitions. [2022-01-18 06:09:46,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:46,191 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 647 transitions. [2022-01-18 06:09:46,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 06:09:46,191 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:46,191 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:09:46,207 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 06:09:46,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:46,408 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:09:46,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:46,408 INFO L85 PathProgramCache]: Analyzing trace with hash 946505877, now seen corresponding path program 1 times [2022-01-18 06:09:46,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:46,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002728928] [2022-01-18 06:09:46,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:46,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:46,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:46,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002728928] [2022-01-18 06:09:46,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002728928] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:46,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518866897] [2022-01-18 06:09:46,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:46,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:46,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:46,547 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 06:09:46,549 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 06:09:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:46,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:09:46,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:46,795 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 18 treesize of output 14 [2022-01-18 06:09:46,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2022-01-18 06:09:46,838 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 13 treesize of output 9 [2022-01-18 06:09:46,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:46,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:46,951 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 29 treesize of output 27 [2022-01-18 06:09:46,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:09:47,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:09:47,032 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 13 treesize of output 18 [2022-01-18 06:09:47,050 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 13 treesize of output 7 [2022-01-18 06:09:47,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:47,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518866897] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:47,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:47,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 06:09:47,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390517588] [2022-01-18 06:09:47,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:47,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 06:09:47,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:47,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 06:09:47,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-01-18 06:09:47,125 INFO L87 Difference]: Start difference. First operand 215 states and 647 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:47,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:47,347 INFO L93 Difference]: Finished difference Result 425 states and 1255 transitions. [2022-01-18 06:09:47,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 06:09:47,348 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 06:09:47,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:47,350 INFO L225 Difference]: With dead ends: 425 [2022-01-18 06:09:47,350 INFO L226 Difference]: Without dead ends: 398 [2022-01-18 06:09:47,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-01-18 06:09:47,350 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 65 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:47,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 92 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:09:47,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-01-18 06:09:47,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 294. [2022-01-18 06:09:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9829351535836177) internal successors, (874), 293 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:47,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 874 transitions. [2022-01-18 06:09:47,359 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 874 transitions. Word has length 23 [2022-01-18 06:09:47,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:47,359 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 874 transitions. [2022-01-18 06:09:47,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:47,359 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 874 transitions. [2022-01-18 06:09:47,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 06:09:47,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:47,360 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:09:47,378 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 06:09:47,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:47,577 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:09:47,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:47,577 INFO L85 PathProgramCache]: Analyzing trace with hash 615894917, now seen corresponding path program 2 times [2022-01-18 06:09:47,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:47,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103398675] [2022-01-18 06:09:47,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:47,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:47,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:47,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103398675] [2022-01-18 06:09:47,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103398675] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:47,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582175164] [2022-01-18 06:09:47,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:09:47,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:47,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:47,686 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 06:09:47,692 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 06:09:47,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:09:47,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:09:47,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:09:47,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:47,844 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 18 treesize of output 14 [2022-01-18 06:09:47,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2022-01-18 06:09:47,878 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 17 treesize of output 13 [2022-01-18 06:09:47,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:47,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:48,054 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 29 treesize of output 27 [2022-01-18 06:09:48,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:09:48,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:09:48,125 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 13 treesize of output 18 [2022-01-18 06:09:48,144 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 12 treesize of output 5 [2022-01-18 06:09:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:48,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582175164] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:48,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:48,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-18 06:09:48,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55417834] [2022-01-18 06:09:48,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:48,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:09:48,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:48,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:09:48,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:09:48,221 INFO L87 Difference]: Start difference. First operand 294 states and 874 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 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 06:09:48,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:48,995 INFO L93 Difference]: Finished difference Result 820 states and 2540 transitions. [2022-01-18 06:09:48,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 06:09:48,996 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 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 23 [2022-01-18 06:09:48,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:48,999 INFO L225 Difference]: With dead ends: 820 [2022-01-18 06:09:48,999 INFO L226 Difference]: Without dead ends: 793 [2022-01-18 06:09:49,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2022-01-18 06:09:49,000 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 224 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:49,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 135 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:09:49,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-01-18 06:09:49,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 314. [2022-01-18 06:09:49,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.073482428115016) internal successors, (962), 313 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:49,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 962 transitions. [2022-01-18 06:09:49,009 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 962 transitions. Word has length 23 [2022-01-18 06:09:49,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:49,010 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 962 transitions. [2022-01-18 06:09:49,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 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 06:09:49,010 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 962 transitions. [2022-01-18 06:09:49,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 06:09:49,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:49,010 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:09:49,029 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 06:09:49,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:49,223 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:09:49,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:49,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1351743519, now seen corresponding path program 3 times [2022-01-18 06:09:49,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:49,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811940418] [2022-01-18 06:09:49,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:49,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:49,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:49,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:49,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811940418] [2022-01-18 06:09:49,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811940418] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:49,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217924626] [2022-01-18 06:09:49,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:09:49,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:49,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:49,328 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 06:09:49,333 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 06:09:49,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:09:49,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:09:49,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:09:49,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:49,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-18 06:09:49,470 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 19 treesize of output 15 [2022-01-18 06:09:49,505 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 20 treesize of output 16 [2022-01-18 06:09:49,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:49,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:49,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:09:49,686 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 25 [2022-01-18 06:09:49,689 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 29 treesize of output 27 [2022-01-18 06:09:49,710 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 19 treesize of output 15 [2022-01-18 06:09:49,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:09:49,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:49,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217924626] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:49,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:49,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-18 06:09:49,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379405100] [2022-01-18 06:09:49,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:49,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:09:49,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:49,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:09:49,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:09:49,826 INFO L87 Difference]: Start difference. First operand 314 states and 962 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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 06:09:50,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:50,145 INFO L93 Difference]: Finished difference Result 582 states and 1803 transitions. [2022-01-18 06:09:50,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 06:09:50,146 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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 23 [2022-01-18 06:09:50,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:50,148 INFO L225 Difference]: With dead ends: 582 [2022-01-18 06:09:50,148 INFO L226 Difference]: Without dead ends: 555 [2022-01-18 06:09:50,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:09:50,149 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 102 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:50,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 102 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:09:50,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-01-18 06:09:50,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 366. [2022-01-18 06:09:50,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:50,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2022-01-18 06:09:50,157 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2022-01-18 06:09:50,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:50,157 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2022-01-18 06:09:50,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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 06:09:50,158 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2022-01-18 06:09:50,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 06:09:50,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:50,158 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:09:50,177 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 06:09:50,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:50,359 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:09:50,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:50,360 INFO L85 PathProgramCache]: Analyzing trace with hash -68708093, now seen corresponding path program 4 times [2022-01-18 06:09:50,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:50,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318335933] [2022-01-18 06:09:50,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:50,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:50,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:50,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:50,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318335933] [2022-01-18 06:09:50,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318335933] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:50,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141997735] [2022-01-18 06:09:50,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:09:50,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:50,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:50,460 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 06:09:50,461 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 06:09:50,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:09:50,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:09:50,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:09:50,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:50,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-18 06:09:50,616 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 17 treesize of output 13 [2022-01-18 06:09:50,636 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 13 treesize of output 9 [2022-01-18 06:09:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:50,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:50,794 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:09:50,794 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 25 [2022-01-18 06:09:50,797 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 29 treesize of output 27 [2022-01-18 06:09:50,836 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 19 treesize of output 15 [2022-01-18 06:09:50,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:09:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:50,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141997735] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:50,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:50,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-18 06:09:50,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424001759] [2022-01-18 06:09:50,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:50,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:09:50,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:50,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:09:50,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:09:50,956 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 06:09:51,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:51,662 INFO L93 Difference]: Finished difference Result 1010 states and 3145 transitions. [2022-01-18 06:09:51,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 06:09:51,662 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 23 [2022-01-18 06:09:51,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:51,666 INFO L225 Difference]: With dead ends: 1010 [2022-01-18 06:09:51,666 INFO L226 Difference]: Without dead ends: 956 [2022-01-18 06:09:51,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:09:51,667 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 193 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:51,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 109 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:09:51,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-01-18 06:09:51,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 406. [2022-01-18 06:09:51,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.1703703703703705) internal successors, (1284), 405 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:51,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1284 transitions. [2022-01-18 06:09:51,678 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1284 transitions. Word has length 23 [2022-01-18 06:09:51,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:51,678 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1284 transitions. [2022-01-18 06:09:51,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 06:09:51,679 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1284 transitions. [2022-01-18 06:09:51,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 06:09:51,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:51,680 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, 1] [2022-01-18 06:09:51,698 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 06:09:51,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:51,895 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:09:51,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:51,896 INFO L85 PathProgramCache]: Analyzing trace with hash 784698867, now seen corresponding path program 5 times [2022-01-18 06:09:51,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:51,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252137103] [2022-01-18 06:09:51,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:51,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:51,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:51,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252137103] [2022-01-18 06:09:51,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252137103] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:51,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622757672] [2022-01-18 06:09:51,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:09:51,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:51,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:51,921 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 06:09:51,922 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 06:09:51,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:09:51,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:09:51,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:09:51,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:51,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:51,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:52,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622757672] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:52,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:52,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 06:09:52,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410347654] [2022-01-18 06:09:52,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:52,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 06:09:52,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:52,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 06:09:52,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:09:52,036 INFO L87 Difference]: Start difference. First operand 406 states and 1284 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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 06:09:52,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:52,143 INFO L93 Difference]: Finished difference Result 909 states and 2785 transitions. [2022-01-18 06:09:52,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 06:09:52,143 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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 25 [2022-01-18 06:09:52,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:52,147 INFO L225 Difference]: With dead ends: 909 [2022-01-18 06:09:52,147 INFO L226 Difference]: Without dead ends: 909 [2022-01-18 06:09:52,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-01-18 06:09:52,148 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 93 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:52,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 69 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:09:52,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-01-18 06:09:52,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 460. [2022-01-18 06:09:52,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.252723311546841) internal successors, (1493), 459 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:52,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1493 transitions. [2022-01-18 06:09:52,160 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1493 transitions. Word has length 25 [2022-01-18 06:09:52,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:52,161 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 1493 transitions. [2022-01-18 06:09:52,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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 06:09:52,161 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1493 transitions. [2022-01-18 06:09:52,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 06:09:52,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:52,162 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, 1] [2022-01-18 06:09:52,180 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 06:09:52,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:52,378 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:09:52,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:52,378 INFO L85 PathProgramCache]: Analyzing trace with hash -817798605, now seen corresponding path program 6 times [2022-01-18 06:09:52,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:52,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071323812] [2022-01-18 06:09:52,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:52,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:52,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:52,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071323812] [2022-01-18 06:09:52,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071323812] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:52,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86023267] [2022-01-18 06:09:52,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:09:52,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:52,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:52,405 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 06:09:52,406 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 06:09:52,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:09:52,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:09:52,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 06:09:52,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:09:52,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:09:52,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86023267] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:52,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:52,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-01-18 06:09:52,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627956572] [2022-01-18 06:09:52,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:52,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 06:09:52,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:52,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 06:09:52,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-18 06:09:52,518 INFO L87 Difference]: Start difference. First operand 460 states and 1493 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 06:09:53,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:53,304 INFO L93 Difference]: Finished difference Result 2206 states and 6830 transitions. [2022-01-18 06:09:53,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 06:09:53,304 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 25 [2022-01-18 06:09:53,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:53,313 INFO L225 Difference]: With dead ends: 2206 [2022-01-18 06:09:53,314 INFO L226 Difference]: Without dead ends: 2206 [2022-01-18 06:09:53,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=677, Invalid=2745, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 06:09:53,315 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 440 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:53,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 125 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:09:53,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2206 states. [2022-01-18 06:09:53,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2206 to 841. [2022-01-18 06:09:53,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.5) internal successors, (2940), 840 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:53,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2940 transitions. [2022-01-18 06:09:53,345 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2940 transitions. Word has length 25 [2022-01-18 06:09:53,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:53,346 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 2940 transitions. [2022-01-18 06:09:53,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 06:09:53,346 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2940 transitions. [2022-01-18 06:09:53,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 06:09:53,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:53,349 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, 1] [2022-01-18 06:09:53,365 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 06:09:53,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-18 06:09:53,565 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:09:53,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:53,565 INFO L85 PathProgramCache]: Analyzing trace with hash 136398371, now seen corresponding path program 7 times [2022-01-18 06:09:53,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:53,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881076563] [2022-01-18 06:09:53,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:53,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:53,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:53,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881076563] [2022-01-18 06:09:53,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881076563] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:53,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371001572] [2022-01-18 06:09:53,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:09:53,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:53,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:53,591 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 06:09:53,592 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 06:09:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:53,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:09:53,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:53,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:53,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:53,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:53,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371001572] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:53,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:53,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 06:09:53,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598880865] [2022-01-18 06:09:53,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:53,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 06:09:53,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:53,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 06:09:53,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 06:09:53,691 INFO L87 Difference]: Start difference. First operand 841 states and 2940 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:53,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:53,771 INFO L93 Difference]: Finished difference Result 1241 states and 4180 transitions. [2022-01-18 06:09:53,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 06:09:53,772 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 06:09:53,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:53,778 INFO L225 Difference]: With dead ends: 1241 [2022-01-18 06:09:53,778 INFO L226 Difference]: Without dead ends: 1235 [2022-01-18 06:09:53,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 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 06:09:53,779 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 90 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:53,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 41 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:09:53,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2022-01-18 06:09:53,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 840. [2022-01-18 06:09:53,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 3.4803337306317044) internal successors, (2920), 839 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:53,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2920 transitions. [2022-01-18 06:09:53,801 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2920 transitions. Word has length 25 [2022-01-18 06:09:53,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:53,801 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 2920 transitions. [2022-01-18 06:09:53,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:53,802 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2920 transitions. [2022-01-18 06:09:53,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 06:09:53,803 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:53,803 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, 1] [2022-01-18 06:09:53,822 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 06:09:54,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:54,019 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:09:54,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:54,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1382698947, now seen corresponding path program 8 times [2022-01-18 06:09:54,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:54,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826446144] [2022-01-18 06:09:54,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:54,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:54,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:54,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826446144] [2022-01-18 06:09:54,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826446144] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:54,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438317766] [2022-01-18 06:09:54,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:09:54,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:54,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:54,059 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 06:09:54,060 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 06:09:54,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:09:54,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:09:54,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:09:54,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:09:54,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:09:54,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438317766] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:54,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:54,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-18 06:09:54,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486395347] [2022-01-18 06:09:54,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:54,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 06:09:54,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:54,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 06:09:54,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:09:54,152 INFO L87 Difference]: Start difference. First operand 840 states and 2920 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:54,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:54,521 INFO L93 Difference]: Finished difference Result 2629 states and 9167 transitions. [2022-01-18 06:09:54,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 06:09:54,522 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 06:09:54,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:54,532 INFO L225 Difference]: With dead ends: 2629 [2022-01-18 06:09:54,532 INFO L226 Difference]: Without dead ends: 2587 [2022-01-18 06:09:54,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 06:09:54,533 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 341 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:54,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 60 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:09:54,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2022-01-18 06:09:54,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 1338. [2022-01-18 06:09:54,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.6738967838444276) internal successors, (4912), 1337 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 06:09:54,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4912 transitions. [2022-01-18 06:09:54,568 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4912 transitions. Word has length 25 [2022-01-18 06:09:54,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:54,568 INFO L470 AbstractCegarLoop]: Abstraction has 1338 states and 4912 transitions. [2022-01-18 06:09:54,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:54,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4912 transitions. [2022-01-18 06:09:54,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:09:54,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:54,572 INFO L514 BasicCegarLoop]: trace histogram [2, 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 06:09:54,615 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 06:09:54,787 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,SelfDestructingSolverStorable12 [2022-01-18 06:09:54,787 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:09:54,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:54,788 INFO L85 PathProgramCache]: Analyzing trace with hash 849469189, now seen corresponding path program 9 times [2022-01-18 06:09:54,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:54,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271891069] [2022-01-18 06:09:54,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:54,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:54,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:54,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:54,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271891069] [2022-01-18 06:09:54,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271891069] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:54,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874602806] [2022-01-18 06:09:54,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:09:54,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:54,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:54,853 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 06:09:54,866 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 06:09:54,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:09:54,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:09:54,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 06:09:54,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:09:54,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:09:54,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874602806] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:54,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:54,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-18 06:09:54,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293540] [2022-01-18 06:09:54,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:54,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 06:09:54,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:54,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 06:09:54,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:09:54,972 INFO L87 Difference]: Start difference. First operand 1338 states and 4912 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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 06:09:55,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:55,283 INFO L93 Difference]: Finished difference Result 2926 states and 9834 transitions. [2022-01-18 06:09:55,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 06:09:55,283 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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 26 [2022-01-18 06:09:55,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:55,293 INFO L225 Difference]: With dead ends: 2926 [2022-01-18 06:09:55,293 INFO L226 Difference]: Without dead ends: 2537 [2022-01-18 06:09:55,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:09:55,294 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 280 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:55,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 101 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:09:55,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2022-01-18 06:09:55,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 1717. [2022-01-18 06:09:55,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1716 states have (on average 3.518065268065268) internal successors, (6037), 1716 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:55,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 6037 transitions. [2022-01-18 06:09:55,330 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 6037 transitions. Word has length 26 [2022-01-18 06:09:55,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:55,330 INFO L470 AbstractCegarLoop]: Abstraction has 1717 states and 6037 transitions. [2022-01-18 06:09:55,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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 06:09:55,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 6037 transitions. [2022-01-18 06:09:55,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:09:55,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:55,334 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:09:55,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-01-18 06:09:55,549 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,SelfDestructingSolverStorable13 [2022-01-18 06:09:55,550 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:09:55,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:55,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1971117019, now seen corresponding path program 10 times [2022-01-18 06:09:55,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:55,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248224099] [2022-01-18 06:09:55,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:55,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:55,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:55,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248224099] [2022-01-18 06:09:55,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248224099] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:55,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485590292] [2022-01-18 06:09:55,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:09:55,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:55,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:55,577 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 06:09:55,578 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 06:09:55,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:09:55,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:09:55,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:09:55,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:09:55,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:09:55,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485590292] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:55,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:55,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-18 06:09:55,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105471247] [2022-01-18 06:09:55,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:55,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 06:09:55,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:55,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 06:09:55,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:09:55,700 INFO L87 Difference]: Start difference. First operand 1717 states and 6037 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:56,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:56,135 INFO L93 Difference]: Finished difference Result 7005 states and 23425 transitions. [2022-01-18 06:09:56,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 06:09:56,136 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:09:56,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:56,158 INFO L225 Difference]: With dead ends: 7005 [2022-01-18 06:09:56,158 INFO L226 Difference]: Without dead ends: 6920 [2022-01-18 06:09:56,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 06:09:56,159 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 308 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:56,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 128 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:09:56,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6920 states. [2022-01-18 06:09:56,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6920 to 3961. [2022-01-18 06:09:56,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3961 states, 3960 states have (on average 3.6626262626262625) internal successors, (14504), 3960 states have internal predecessors, (14504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:56,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3961 states to 3961 states and 14504 transitions. [2022-01-18 06:09:56,279 INFO L78 Accepts]: Start accepts. Automaton has 3961 states and 14504 transitions. Word has length 28 [2022-01-18 06:09:56,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:56,280 INFO L470 AbstractCegarLoop]: Abstraction has 3961 states and 14504 transitions. [2022-01-18 06:09:56,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:56,280 INFO L276 IsEmpty]: Start isEmpty. Operand 3961 states and 14504 transitions. [2022-01-18 06:09:56,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:09:56,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:56,288 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:09:56,306 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 06:09:56,503 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,SelfDestructingSolverStorable14 [2022-01-18 06:09:56,503 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:09:56,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:56,504 INFO L85 PathProgramCache]: Analyzing trace with hash -191772803, now seen corresponding path program 11 times [2022-01-18 06:09:56,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:56,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525094219] [2022-01-18 06:09:56,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:56,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:56,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:56,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:56,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:56,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525094219] [2022-01-18 06:09:56,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525094219] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:56,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318035988] [2022-01-18 06:09:56,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:09:56,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:56,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:56,530 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 06:09:56,531 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 06:09:56,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:09:56,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:09:56,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 06:09:56,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:56,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:56,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:56,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318035988] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:56,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:56,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 8 [2022-01-18 06:09:56,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993257202] [2022-01-18 06:09:56,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:56,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 06:09:56,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:56,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 06:09:56,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:09:56,656 INFO L87 Difference]: Start difference. First operand 3961 states and 14504 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:56,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:56,881 INFO L93 Difference]: Finished difference Result 7306 states and 25843 transitions. [2022-01-18 06:09:56,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 06:09:56,882 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:09:56,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:56,901 INFO L225 Difference]: With dead ends: 7306 [2022-01-18 06:09:56,901 INFO L226 Difference]: Without dead ends: 7222 [2022-01-18 06:09:56,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-01-18 06:09:56,902 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 131 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:56,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 75 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:09:56,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7222 states. [2022-01-18 06:09:57,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7222 to 5516. [2022-01-18 06:09:57,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5516 states, 5515 states have (on average 3.7071622846781507) internal successors, (20445), 5515 states have internal predecessors, (20445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:57,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5516 states to 5516 states and 20445 transitions. [2022-01-18 06:09:57,040 INFO L78 Accepts]: Start accepts. Automaton has 5516 states and 20445 transitions. Word has length 28 [2022-01-18 06:09:57,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:57,040 INFO L470 AbstractCegarLoop]: Abstraction has 5516 states and 20445 transitions. [2022-01-18 06:09:57,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:57,040 INFO L276 IsEmpty]: Start isEmpty. Operand 5516 states and 20445 transitions. [2022-01-18 06:09:57,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:09:57,051 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:57,051 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:09:57,073 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 06:09:57,267 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,SelfDestructingSolverStorable15 [2022-01-18 06:09:57,267 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:09:57,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:57,268 INFO L85 PathProgramCache]: Analyzing trace with hash -489727391, now seen corresponding path program 12 times [2022-01-18 06:09:57,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:57,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342892828] [2022-01-18 06:09:57,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:57,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:57,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:57,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342892828] [2022-01-18 06:09:57,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342892828] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:57,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514174353] [2022-01-18 06:09:57,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:09:57,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:57,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:57,303 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 06:09:57,304 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 06:09:57,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:09:57,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:09:57,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:09:57,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:57,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:57,426 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:57,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514174353] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:57,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:57,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-01-18 06:09:57,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137698876] [2022-01-18 06:09:57,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:57,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 06:09:57,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:57,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 06:09:57,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:09:57,429 INFO L87 Difference]: Start difference. First operand 5516 states and 20445 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:57,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:09:57,750 INFO L93 Difference]: Finished difference Result 8819 states and 29845 transitions. [2022-01-18 06:09:57,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 06:09:57,750 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:09:57,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:09:57,772 INFO L225 Difference]: With dead ends: 8819 [2022-01-18 06:09:57,772 INFO L226 Difference]: Without dead ends: 8707 [2022-01-18 06:09:57,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:09:57,772 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 248 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:09:57,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 143 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:09:57,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8707 states. [2022-01-18 06:09:57,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8707 to 6491. [2022-01-18 06:09:57,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6491 states, 6490 states have (on average 3.6280431432973805) internal successors, (23546), 6490 states have internal predecessors, (23546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:57,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6491 states to 6491 states and 23546 transitions. [2022-01-18 06:09:57,938 INFO L78 Accepts]: Start accepts. Automaton has 6491 states and 23546 transitions. Word has length 28 [2022-01-18 06:09:57,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:09:57,938 INFO L470 AbstractCegarLoop]: Abstraction has 6491 states and 23546 transitions. [2022-01-18 06:09:57,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:09:57,939 INFO L276 IsEmpty]: Start isEmpty. Operand 6491 states and 23546 transitions. [2022-01-18 06:09:57,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:09:57,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:09:57,956 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:09:57,974 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 06:09:58,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:58,171 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:09:58,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:09:58,172 INFO L85 PathProgramCache]: Analyzing trace with hash -655766583, now seen corresponding path program 13 times [2022-01-18 06:09:58,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:09:58,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41357478] [2022-01-18 06:09:58,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:09:58,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:09:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:58,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:09:58,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41357478] [2022-01-18 06:09:58,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41357478] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:09:58,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478129398] [2022-01-18 06:09:58,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:09:58,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:09:58,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:09:58,458 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 06:09:58,459 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 06:09:58,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:09:58,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:09:58,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:09:58,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-18 06:09:58,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:09:58,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 06:09:58,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-01-18 06:09:58,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-01-18 06:09:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:58,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:09:59,105 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:09:59,106 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 458 treesize of output 426 [2022-01-18 06:09:59,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:09:59,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:09:59,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:09:59,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:09:59,326 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:09:59,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 22 treesize of output 47 [2022-01-18 06:09:59,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:09:59,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:09:59,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:09:59,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 5 [2022-01-18 06:09:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:09:59,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478129398] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:09:59,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:09:59,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2022-01-18 06:09:59,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161827878] [2022-01-18 06:09:59,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:09:59,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 06:09:59,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:09:59,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 06:09:59,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:09:59,443 INFO L87 Difference]: Start difference. First operand 6491 states and 23546 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:01,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:10:01,200 INFO L93 Difference]: Finished difference Result 13830 states and 48778 transitions. [2022-01-18 06:10:01,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 06:10:01,201 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:10:01,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:10:01,288 INFO L225 Difference]: With dead ends: 13830 [2022-01-18 06:10:01,288 INFO L226 Difference]: Without dead ends: 13788 [2022-01-18 06:10:01,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=382, Invalid=2270, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 06:10:01,289 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 292 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 1938 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 2311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:10:01,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 357 Invalid, 2311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1938 Invalid, 0 Unknown, 333 Unchecked, 0.9s Time] [2022-01-18 06:10:01,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13788 states. [2022-01-18 06:10:01,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13788 to 6636. [2022-01-18 06:10:01,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6636 states, 6635 states have (on average 3.619894498869631) internal successors, (24018), 6635 states have internal predecessors, (24018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:01,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6636 states to 6636 states and 24018 transitions. [2022-01-18 06:10:01,457 INFO L78 Accepts]: Start accepts. Automaton has 6636 states and 24018 transitions. Word has length 30 [2022-01-18 06:10:01,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:10:01,457 INFO L470 AbstractCegarLoop]: Abstraction has 6636 states and 24018 transitions. [2022-01-18 06:10:01,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:01,457 INFO L276 IsEmpty]: Start isEmpty. Operand 6636 states and 24018 transitions. [2022-01-18 06:10:01,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:10:01,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:10:01,470 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:10:01,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-18 06:10:01,683 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,SelfDestructingSolverStorable17 [2022-01-18 06:10:01,691 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:10:01,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:10:01,692 INFO L85 PathProgramCache]: Analyzing trace with hash 2048908809, now seen corresponding path program 14 times [2022-01-18 06:10:01,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:10:01,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137771298] [2022-01-18 06:10:01,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:10:01,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:10:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:02,037 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:02,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:10:02,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137771298] [2022-01-18 06:10:02,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137771298] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:10:02,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179059012] [2022-01-18 06:10:02,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:10:02,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:02,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:10:02,038 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 06:10:02,039 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 06:10:02,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:10:02,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:10:02,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:10:02,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:10:02,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-18 06:10:02,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-01-18 06:10:02,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-01-18 06:10:02,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-01-18 06:10:02,550 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:02,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:10:02,684 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:10:02,684 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 1878 treesize of output 1782 [2022-01-18 06:10:03,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:03,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:03,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:03,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:03,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:03,752 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:10:03,752 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 22 treesize of output 47 [2022-01-18 06:10:03,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:03,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:03,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:03,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 5 [2022-01-18 06:10:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:03,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179059012] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:10:03,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:10:03,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 29 [2022-01-18 06:10:03,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403808755] [2022-01-18 06:10:03,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:10:03,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 06:10:03,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:10:03,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 06:10:03,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:10:03,876 INFO L87 Difference]: Start difference. First operand 6636 states and 24018 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:06,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:10:06,461 INFO L93 Difference]: Finished difference Result 13741 states and 48255 transitions. [2022-01-18 06:10:06,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 06:10:06,462 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:10:06,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:10:06,492 INFO L225 Difference]: With dead ends: 13741 [2022-01-18 06:10:06,492 INFO L226 Difference]: Without dead ends: 13699 [2022-01-18 06:10:06,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=460, Invalid=3200, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 06:10:06,493 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 315 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 2307 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 2358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:10:06,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 353 Invalid, 2358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2307 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 06:10:06,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13699 states. [2022-01-18 06:10:06,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13699 to 6695. [2022-01-18 06:10:06,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6695 states, 6694 states have (on average 3.6118912458918433) internal successors, (24178), 6694 states have internal predecessors, (24178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:06,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6695 states to 6695 states and 24178 transitions. [2022-01-18 06:10:06,649 INFO L78 Accepts]: Start accepts. Automaton has 6695 states and 24178 transitions. Word has length 30 [2022-01-18 06:10:06,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:10:06,649 INFO L470 AbstractCegarLoop]: Abstraction has 6695 states and 24178 transitions. [2022-01-18 06:10:06,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:06,650 INFO L276 IsEmpty]: Start isEmpty. Operand 6695 states and 24178 transitions. [2022-01-18 06:10:06,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:10:06,662 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:10:06,662 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:10:06,678 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 06:10:06,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:06,876 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:10:06,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:10:06,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1054839645, now seen corresponding path program 15 times [2022-01-18 06:10:06,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:10:06,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971924998] [2022-01-18 06:10:06,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:10:06,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:10:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:07,095 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:07,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:10:07,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971924998] [2022-01-18 06:10:07,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971924998] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:10:07,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938789646] [2022-01-18 06:10:07,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:10:07,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:07,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:10:07,097 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 06:10:07,098 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 06:10:07,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:10:07,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:10:07,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:10:07,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:10:07,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-18 06:10:07,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:07,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:07,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:07,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-01-18 06:10:07,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:07,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-01-18 06:10:07,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-01-18 06:10:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:07,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:10:07,851 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:10:07,852 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 1866 treesize of output 1770 [2022-01-18 06:10:08,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:08,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:08,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:08,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:08,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:08,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:08,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:08,176 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:10:08,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-18 06:10:08,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:08,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:08,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:08,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:08,215 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 22 treesize of output 5 [2022-01-18 06:10:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:08,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938789646] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:10:08,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:10:08,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 06:10:08,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331853500] [2022-01-18 06:10:08,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:10:08,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 06:10:08,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:10:08,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 06:10:08,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-01-18 06:10:08,288 INFO L87 Difference]: Start difference. First operand 6695 states and 24178 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:10,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:10:10,112 INFO L93 Difference]: Finished difference Result 16566 states and 56696 transitions. [2022-01-18 06:10:10,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 06:10:10,123 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:10:10,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:10:10,161 INFO L225 Difference]: With dead ends: 16566 [2022-01-18 06:10:10,161 INFO L226 Difference]: Without dead ends: 16482 [2022-01-18 06:10:10,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=436, Invalid=3470, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 06:10:10,163 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 356 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 1609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:10:10,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 285 Invalid, 1609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1296 Invalid, 0 Unknown, 260 Unchecked, 0.7s Time] [2022-01-18 06:10:10,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16482 states. [2022-01-18 06:10:10,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16482 to 7235. [2022-01-18 06:10:10,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7235 states, 7234 states have (on average 3.6300801769422173) internal successors, (26260), 7234 states have internal predecessors, (26260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:10,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7235 states to 7235 states and 26260 transitions. [2022-01-18 06:10:10,365 INFO L78 Accepts]: Start accepts. Automaton has 7235 states and 26260 transitions. Word has length 30 [2022-01-18 06:10:10,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:10:10,365 INFO L470 AbstractCegarLoop]: Abstraction has 7235 states and 26260 transitions. [2022-01-18 06:10:10,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:10,365 INFO L276 IsEmpty]: Start isEmpty. Operand 7235 states and 26260 transitions. [2022-01-18 06:10:10,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:10:10,379 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:10:10,379 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:10:10,398 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 06:10:10,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:10,595 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:10:10,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:10:10,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1811677887, now seen corresponding path program 16 times [2022-01-18 06:10:10,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:10:10,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858581649] [2022-01-18 06:10:10,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:10:10,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:10:10,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:10,829 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:10,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:10:10,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858581649] [2022-01-18 06:10:10,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858581649] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:10:10,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107200091] [2022-01-18 06:10:10,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:10:10,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:10,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:10:10,830 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 06:10:10,831 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 06:10:10,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:10:10,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:10:10,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:10:10,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:10:11,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-18 06:10:11,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:11,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:11,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-01-18 06:10:11,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:11,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 06:10:11,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 35 [2022-01-18 06:10:11,425 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:11,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:10:11,573 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:10:11,573 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 1878 treesize of output 1782 [2022-01-18 06:10:11,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:11,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:11,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:11,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:11,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:11,992 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:10:11,992 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:10:12,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:12,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:12,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:12,051 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 22 treesize of output 5 [2022-01-18 06:10:12,096 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:12,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107200091] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:10:12,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:10:12,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 06:10:12,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831450400] [2022-01-18 06:10:12,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:10:12,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 06:10:12,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:10:12,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 06:10:12,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-01-18 06:10:12,097 INFO L87 Difference]: Start difference. First operand 7235 states and 26260 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:12,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:10:12,955 INFO L93 Difference]: Finished difference Result 15739 states and 55669 transitions. [2022-01-18 06:10:12,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 06:10:12,957 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:10:12,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:10:12,999 INFO L225 Difference]: With dead ends: 15739 [2022-01-18 06:10:12,999 INFO L226 Difference]: Without dead ends: 15712 [2022-01-18 06:10:12,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 06:10:13,000 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 180 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 473 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:10:13,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 243 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1076 Invalid, 0 Unknown, 473 Unchecked, 0.5s Time] [2022-01-18 06:10:13,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15712 states. [2022-01-18 06:10:13,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15712 to 7238. [2022-01-18 06:10:13,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7238 states, 7237 states have (on average 3.630233522177698) internal successors, (26272), 7237 states have internal predecessors, (26272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:13,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7238 states to 7238 states and 26272 transitions. [2022-01-18 06:10:13,193 INFO L78 Accepts]: Start accepts. Automaton has 7238 states and 26272 transitions. Word has length 30 [2022-01-18 06:10:13,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:10:13,194 INFO L470 AbstractCegarLoop]: Abstraction has 7238 states and 26272 transitions. [2022-01-18 06:10:13,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:13,194 INFO L276 IsEmpty]: Start isEmpty. Operand 7238 states and 26272 transitions. [2022-01-18 06:10:13,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:10:13,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:10:13,208 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:10:13,226 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 06:10:13,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:13,423 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:10:13,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:10:13,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1682132343, now seen corresponding path program 17 times [2022-01-18 06:10:13,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:10:13,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430609927] [2022-01-18 06:10:13,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:10:13,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:10:13,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:13,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:10:13,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430609927] [2022-01-18 06:10:13,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430609927] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:10:13,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818124767] [2022-01-18 06:10:13,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:10:13,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:13,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:10:13,622 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 06:10:13,623 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 06:10:13,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:10:13,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:10:13,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-18 06:10:13,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:10:13,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-18 06:10:13,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:13,912 INFO L353 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-01-18 06:10:13,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 34 [2022-01-18 06:10:13,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:13,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-01-18 06:10:14,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2022-01-18 06:10:14,086 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:14,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:10:14,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:14,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:14,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:14,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:14,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:14,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:14,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:14,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:14,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:14,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:14,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:14,444 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:10:14,445 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 22 treesize of output 41 [2022-01-18 06:10:14,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:14,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:14,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:14,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:14,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 5 [2022-01-18 06:10:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:14,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818124767] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:10:14,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:10:14,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 27 [2022-01-18 06:10:14,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300869761] [2022-01-18 06:10:14,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:10:14,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 06:10:14,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:10:14,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 06:10:14,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:10:14,566 INFO L87 Difference]: Start difference. First operand 7238 states and 26272 transitions. Second operand has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:19,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:10:19,560 INFO L93 Difference]: Finished difference Result 11143 states and 38720 transitions. [2022-01-18 06:10:19,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-18 06:10:19,561 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:10:19,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:10:19,585 INFO L225 Difference]: With dead ends: 11143 [2022-01-18 06:10:19,586 INFO L226 Difference]: Without dead ends: 11059 [2022-01-18 06:10:19,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4005 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1414, Invalid=10358, Unknown=0, NotChecked=0, Total=11772 [2022-01-18 06:10:19,588 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 318 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 2262 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 2535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:10:19,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 573 Invalid, 2535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2262 Invalid, 0 Unknown, 216 Unchecked, 1.2s Time] [2022-01-18 06:10:19,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11059 states. [2022-01-18 06:10:19,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11059 to 7638. [2022-01-18 06:10:19,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7638 states, 7637 states have (on average 3.646458033259133) internal successors, (27848), 7637 states have internal predecessors, (27848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:19,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7638 states to 7638 states and 27848 transitions. [2022-01-18 06:10:19,740 INFO L78 Accepts]: Start accepts. Automaton has 7638 states and 27848 transitions. Word has length 30 [2022-01-18 06:10:19,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:10:19,740 INFO L470 AbstractCegarLoop]: Abstraction has 7638 states and 27848 transitions. [2022-01-18 06:10:19,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:19,740 INFO L276 IsEmpty]: Start isEmpty. Operand 7638 states and 27848 transitions. [2022-01-18 06:10:19,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:10:19,754 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:10:19,754 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:10:19,770 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 06:10:19,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:19,955 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:10:19,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:10:19,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1060251933, now seen corresponding path program 18 times [2022-01-18 06:10:19,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:10:19,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906736971] [2022-01-18 06:10:19,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:10:19,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:10:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:20,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:20,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:10:20,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906736971] [2022-01-18 06:10:20,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906736971] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:10:20,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382828510] [2022-01-18 06:10:20,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:10:20,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:20,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:10:20,160 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 06:10:20,161 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 06:10:20,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:10:20,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:10:20,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 06:10:20,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:10:20,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-18 06:10:20,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:20,472 INFO L353 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-01-18 06:10:20,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 34 [2022-01-18 06:10:20,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:20,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-01-18 06:10:20,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:10:20,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 49 [2022-01-18 06:10:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:20,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:10:21,197 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:10:21,197 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 1667 treesize of output 1612 [2022-01-18 06:10:30,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:30,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:30,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:30,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:30,841 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 44 treesize of output 14 [2022-01-18 06:10:30,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:30,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:30,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:10:30,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2022-01-18 06:10:30,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:30,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:30,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:30,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:30,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:10:30,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:30,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:30,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:30,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:30,867 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 17 [2022-01-18 06:10:30,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:30,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:30,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2022-01-18 06:10:30,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:30,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:30,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:30,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:30,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 14 [2022-01-18 06:10:30,956 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:30,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382828510] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:10:30,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:10:30,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-01-18 06:10:30,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485781023] [2022-01-18 06:10:30,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:10:30,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 06:10:30,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:10:30,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 06:10:30,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:10:30,957 INFO L87 Difference]: Start difference. First operand 7638 states and 27848 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:35,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:10:35,016 INFO L93 Difference]: Finished difference Result 18582 states and 65753 transitions. [2022-01-18 06:10:35,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 06:10:35,016 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:10:35,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:10:35,063 INFO L225 Difference]: With dead ends: 18582 [2022-01-18 06:10:35,063 INFO L226 Difference]: Without dead ends: 18528 [2022-01-18 06:10:35,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=545, Invalid=3877, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 06:10:35,064 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 196 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 897 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:10:35,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 372 Invalid, 1823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 902 Invalid, 0 Unknown, 897 Unchecked, 0.5s Time] [2022-01-18 06:10:35,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18528 states. [2022-01-18 06:10:35,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18528 to 7683. [2022-01-18 06:10:35,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7683 states, 7682 states have (on average 3.6517833897422545) internal successors, (28053), 7682 states have internal predecessors, (28053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:35,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7683 states to 7683 states and 28053 transitions. [2022-01-18 06:10:35,291 INFO L78 Accepts]: Start accepts. Automaton has 7683 states and 28053 transitions. Word has length 30 [2022-01-18 06:10:35,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:10:35,291 INFO L470 AbstractCegarLoop]: Abstraction has 7683 states and 28053 transitions. [2022-01-18 06:10:35,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:35,291 INFO L276 IsEmpty]: Start isEmpty. Operand 7683 states and 28053 transitions. [2022-01-18 06:10:35,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:10:35,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:10:35,306 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:10:35,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-01-18 06:10:35,506 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,SelfDestructingSolverStorable22 [2022-01-18 06:10:35,506 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:10:35,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:10:35,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1321740765, now seen corresponding path program 19 times [2022-01-18 06:10:35,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:10:35,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032441820] [2022-01-18 06:10:35,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:10:35,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:10:35,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:35,690 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:35,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:10:35,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032441820] [2022-01-18 06:10:35,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032441820] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:10:35,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957564800] [2022-01-18 06:10:35,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:10:35,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:35,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:10:35,691 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 06:10:35,692 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 06:10:35,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:35,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:10:35,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:10:35,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-18 06:10:35,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:35,966 INFO L353 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-01-18 06:10:35,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 36 [2022-01-18 06:10:35,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:35,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-01-18 06:10:36,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2022-01-18 06:10:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:36,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:10:36,287 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:10:36,287 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 1878 treesize of output 1782 [2022-01-18 06:10:36,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:36,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:36,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:36,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:36,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:36,626 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:10:36,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 22 treesize of output 47 [2022-01-18 06:10:36,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:36,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:36,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:36,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 5 [2022-01-18 06:10:36,738 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:36,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957564800] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:10:36,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:10:36,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 06:10:36,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861269807] [2022-01-18 06:10:36,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:10:36,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:10:36,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:10:36,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:10:36,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:10:36,739 INFO L87 Difference]: Start difference. First operand 7683 states and 28053 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:40,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:10:40,058 INFO L93 Difference]: Finished difference Result 19248 states and 66888 transitions. [2022-01-18 06:10:40,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 06:10:40,059 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:10:40,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:10:40,109 INFO L225 Difference]: With dead ends: 19248 [2022-01-18 06:10:40,109 INFO L226 Difference]: Without dead ends: 19215 [2022-01-18 06:10:40,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=707, Invalid=3985, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 06:10:40,110 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 259 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 2550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:10:40,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 434 Invalid, 2550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2393 Invalid, 0 Unknown, 93 Unchecked, 1.1s Time] [2022-01-18 06:10:40,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19215 states. [2022-01-18 06:10:40,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19215 to 7708. [2022-01-18 06:10:40,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7708 states, 7707 states have (on average 3.6522641754249383) internal successors, (28148), 7707 states have internal predecessors, (28148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:40,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7708 states to 7708 states and 28148 transitions. [2022-01-18 06:10:40,350 INFO L78 Accepts]: Start accepts. Automaton has 7708 states and 28148 transitions. Word has length 30 [2022-01-18 06:10:40,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:10:40,350 INFO L470 AbstractCegarLoop]: Abstraction has 7708 states and 28148 transitions. [2022-01-18 06:10:40,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:40,350 INFO L276 IsEmpty]: Start isEmpty. Operand 7708 states and 28148 transitions. [2022-01-18 06:10:40,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:10:40,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:10:40,363 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:10:40,379 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 06:10:40,565 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,SelfDestructingSolverStorable23 [2022-01-18 06:10:40,565 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:10:40,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:10:40,566 INFO L85 PathProgramCache]: Analyzing trace with hash -577320523, now seen corresponding path program 20 times [2022-01-18 06:10:40,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:10:40,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133599065] [2022-01-18 06:10:40,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:10:40,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:10:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:40,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:10:40,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133599065] [2022-01-18 06:10:40,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133599065] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:10:40,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030364812] [2022-01-18 06:10:40,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:10:40,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:40,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:10:40,777 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 06:10:40,779 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 06:10:40,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:10:40,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:10:40,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:10:40,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:10:40,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-18 06:10:41,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:41,068 INFO L353 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-01-18 06:10:41,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 34 [2022-01-18 06:10:41,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:41,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-01-18 06:10:41,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2022-01-18 06:10:41,218 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:41,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:10:41,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:41,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1878 treesize of output 1782 [2022-01-18 06:10:41,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:41,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:41,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:41,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:41,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:41,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:41,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:41,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:10:41,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-18 06:10:41,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:41,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:41,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:41,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:41,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 5 [2022-01-18 06:10:41,893 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:41,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030364812] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:10:41,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:10:41,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 06:10:41,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020829366] [2022-01-18 06:10:41,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:10:41,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:10:41,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:10:41,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:10:41,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:10:41,894 INFO L87 Difference]: Start difference. First operand 7708 states and 28148 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:43,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:10:43,028 INFO L93 Difference]: Finished difference Result 12582 states and 45616 transitions. [2022-01-18 06:10:43,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 06:10:43,029 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:10:43,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:10:43,059 INFO L225 Difference]: With dead ends: 12582 [2022-01-18 06:10:43,059 INFO L226 Difference]: Without dead ends: 12528 [2022-01-18 06:10:43,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=252, Invalid=1554, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 06:10:43,060 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 196 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:10:43,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 193 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1224 Invalid, 0 Unknown, 206 Unchecked, 0.6s Time] [2022-01-18 06:10:43,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12528 states. [2022-01-18 06:10:43,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12528 to 8262. [2022-01-18 06:10:43,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8262 states, 8261 states have (on average 3.669894685873381) internal successors, (30317), 8261 states have internal predecessors, (30317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:43,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8262 states to 8262 states and 30317 transitions. [2022-01-18 06:10:43,231 INFO L78 Accepts]: Start accepts. Automaton has 8262 states and 30317 transitions. Word has length 30 [2022-01-18 06:10:43,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:10:43,231 INFO L470 AbstractCegarLoop]: Abstraction has 8262 states and 30317 transitions. [2022-01-18 06:10:43,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:43,231 INFO L276 IsEmpty]: Start isEmpty. Operand 8262 states and 30317 transitions. [2022-01-18 06:10:43,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:10:43,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:10:43,247 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:10:43,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 06:10:43,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:43,452 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:10:43,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:10:43,453 INFO L85 PathProgramCache]: Analyzing trace with hash 2027651609, now seen corresponding path program 21 times [2022-01-18 06:10:43,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:10:43,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158183124] [2022-01-18 06:10:43,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:10:43,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:10:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:43,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:10:43,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158183124] [2022-01-18 06:10:43,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158183124] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:10:43,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504899058] [2022-01-18 06:10:43,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:10:43,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:43,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:10:43,656 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 06:10:43,656 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 06:10:43,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:10:43,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:10:43,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:10:43,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:10:43,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-18 06:10:43,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:43,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:10:43,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 48 [2022-01-18 06:10:43,949 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 06:10:43,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 37 [2022-01-18 06:10:44,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:10:44,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 53 [2022-01-18 06:10:44,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:44,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:10:45,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:45,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:45,118 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 35 treesize of output 33 [2022-01-18 06:10:45,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:45,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:45,151 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 35 treesize of output 33 [2022-01-18 06:10:45,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:45,567 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:10:45,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 treesize of output 59 [2022-01-18 06:10:45,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:45,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:45,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:45,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:45,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 11 [2022-01-18 06:10:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:45,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504899058] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:10:45,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:10:45,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2022-01-18 06:10:45,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791775534] [2022-01-18 06:10:45,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:10:45,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 06:10:45,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:10:45,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 06:10:45,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 06:10:45,802 INFO L87 Difference]: Start difference. First operand 8262 states and 30317 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:51,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:10:51,511 INFO L93 Difference]: Finished difference Result 22020 states and 77830 transitions. [2022-01-18 06:10:51,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-18 06:10:51,511 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:10:51,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:10:51,561 INFO L225 Difference]: With dead ends: 22020 [2022-01-18 06:10:51,561 INFO L226 Difference]: Without dead ends: 21882 [2022-01-18 06:10:51,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4638 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2319, Invalid=12443, Unknown=0, NotChecked=0, Total=14762 [2022-01-18 06:10:51,564 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 541 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 3653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2646 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:10:51,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 621 Invalid, 3653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 920 Invalid, 0 Unknown, 2646 Unchecked, 0.5s Time] [2022-01-18 06:10:51,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21882 states. [2022-01-18 06:10:51,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21882 to 8357. [2022-01-18 06:10:51,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8357 states, 8356 states have (on average 3.669100047869794) internal successors, (30659), 8356 states have internal predecessors, (30659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:51,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8357 states to 8357 states and 30659 transitions. [2022-01-18 06:10:51,826 INFO L78 Accepts]: Start accepts. Automaton has 8357 states and 30659 transitions. Word has length 30 [2022-01-18 06:10:51,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:10:51,826 INFO L470 AbstractCegarLoop]: Abstraction has 8357 states and 30659 transitions. [2022-01-18 06:10:51,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:51,826 INFO L276 IsEmpty]: Start isEmpty. Operand 8357 states and 30659 transitions. [2022-01-18 06:10:51,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:10:51,841 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:10:51,841 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:10:51,858 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 06:10:52,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:52,041 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:10:52,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:10:52,042 INFO L85 PathProgramCache]: Analyzing trace with hash -2089941737, now seen corresponding path program 22 times [2022-01-18 06:10:52,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:10:52,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864741612] [2022-01-18 06:10:52,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:10:52,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:10:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:52,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:10:52,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864741612] [2022-01-18 06:10:52,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864741612] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:10:52,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712249678] [2022-01-18 06:10:52,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:10:52,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:52,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:10:52,264 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 06:10:52,265 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 06:10:52,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:10:52,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:10:52,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 06:10:52,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:10:52,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-01-18 06:10:52,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:52,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:52,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:52,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-01-18 06:10:52,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:52,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 06:10:52,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 35 [2022-01-18 06:10:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:52,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:10:52,958 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:10:52,958 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 1878 treesize of output 1782 [2022-01-18 06:10:53,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:53,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:53,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:53,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:53,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:53,769 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:10:53,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 22 treesize of output 47 [2022-01-18 06:10:53,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:53,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:53,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:53,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 5 [2022-01-18 06:10:53,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:53,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712249678] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:10:53,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:10:53,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 06:10:53,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591235786] [2022-01-18 06:10:53,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:10:53,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 06:10:53,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:10:53,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 06:10:53,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-01-18 06:10:53,875 INFO L87 Difference]: Start difference. First operand 8357 states and 30659 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:55,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:10:55,048 INFO L93 Difference]: Finished difference Result 13897 states and 50065 transitions. [2022-01-18 06:10:55,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 06:10:55,048 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:10:55,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:10:55,089 INFO L225 Difference]: With dead ends: 13897 [2022-01-18 06:10:55,090 INFO L226 Difference]: Without dead ends: 13868 [2022-01-18 06:10:55,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=262, Invalid=1460, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:10:55,090 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 201 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:10:55,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 253 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1385 Invalid, 0 Unknown, 114 Unchecked, 0.6s Time] [2022-01-18 06:10:55,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13868 states. [2022-01-18 06:10:55,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13868 to 8326. [2022-01-18 06:10:55,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8326 states, 8325 states have (on average 3.669069069069069) internal successors, (30545), 8325 states have internal predecessors, (30545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:55,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8326 states to 8326 states and 30545 transitions. [2022-01-18 06:10:55,297 INFO L78 Accepts]: Start accepts. Automaton has 8326 states and 30545 transitions. Word has length 30 [2022-01-18 06:10:55,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:10:55,298 INFO L470 AbstractCegarLoop]: Abstraction has 8326 states and 30545 transitions. [2022-01-18 06:10:55,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:10:55,298 INFO L276 IsEmpty]: Start isEmpty. Operand 8326 states and 30545 transitions. [2022-01-18 06:10:55,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:10:55,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:10:55,313 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:10:55,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 06:10:55,514 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,SelfDestructingSolverStorable26 [2022-01-18 06:10:55,514 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:10:55,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:10:55,514 INFO L85 PathProgramCache]: Analyzing trace with hash 2003223385, now seen corresponding path program 23 times [2022-01-18 06:10:55,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:10:55,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287832087] [2022-01-18 06:10:55,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:10:55,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:10:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:10:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:55,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:10:55,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287832087] [2022-01-18 06:10:55,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287832087] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:10:55,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266981760] [2022-01-18 06:10:55,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:10:55,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:10:55,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:10:55,735 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 06:10:55,736 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 06:10:55,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:10:55,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:10:55,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 06:10:55,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:10:55,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-18 06:10:56,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:56,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:56,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:56,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:56,035 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 36 treesize of output 24 [2022-01-18 06:10:56,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:56,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2022-01-18 06:10:56,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:56,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:56,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:56,135 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 26 treesize of output 16 [2022-01-18 06:10:56,220 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:56,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:10:56,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:56,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:56,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 454 treesize of output 422 [2022-01-18 06:10:56,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:56,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:56,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:56,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:56,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:56,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:56,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:56,703 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:10:56,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-18 06:10:56,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:56,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:56,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:10:56,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:10:56,729 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 22 treesize of output 5 [2022-01-18 06:10:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:10:56,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266981760] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:10:56,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:10:56,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2022-01-18 06:10:56,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492247249] [2022-01-18 06:10:56,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:10:56,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 06:10:56,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:10:56,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 06:10:56,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:10:56,822 INFO L87 Difference]: Start difference. First operand 8326 states and 30545 transitions. Second operand has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:01,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:11:01,914 INFO L93 Difference]: Finished difference Result 20845 states and 73188 transitions. [2022-01-18 06:11:01,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-18 06:11:01,914 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 06:11:01,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:11:01,971 INFO L225 Difference]: With dead ends: 20845 [2022-01-18 06:11:01,971 INFO L226 Difference]: Without dead ends: 20755 [2022-01-18 06:11:01,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3871 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1276, Invalid=11380, Unknown=0, NotChecked=0, Total=12656 [2022-01-18 06:11:01,973 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 535 mSDsluCounter, 1432 mSDsCounter, 0 mSdLazyCounter, 2588 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 3389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 715 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:11:01,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 962 Invalid, 3389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2588 Invalid, 0 Unknown, 715 Unchecked, 1.4s Time] [2022-01-18 06:11:01,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20755 states. [2022-01-18 06:11:02,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20755 to 10144. [2022-01-18 06:11:02,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10144 states, 10143 states have (on average 3.7418909592822636) internal successors, (37954), 10143 states have internal predecessors, (37954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:02,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10144 states to 10144 states and 37954 transitions. [2022-01-18 06:11:02,265 INFO L78 Accepts]: Start accepts. Automaton has 10144 states and 37954 transitions. Word has length 30 [2022-01-18 06:11:02,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:11:02,266 INFO L470 AbstractCegarLoop]: Abstraction has 10144 states and 37954 transitions. [2022-01-18 06:11:02,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:11:02,266 INFO L276 IsEmpty]: Start isEmpty. Operand 10144 states and 37954 transitions. [2022-01-18 06:11:02,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 06:11:02,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:11:02,283 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:11:02,301 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 06:11:02,494 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,SelfDestructingSolverStorable27 [2022-01-18 06:11:02,494 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:11:02,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:11:02,494 INFO L85 PathProgramCache]: Analyzing trace with hash -547324907, now seen corresponding path program 24 times [2022-01-18 06:11:02,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:11:02,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99238442] [2022-01-18 06:11:02,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:11:02,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:11:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:11:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:02,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:11:02,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99238442] [2022-01-18 06:11:02,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99238442] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:11:02,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67276630] [2022-01-18 06:11:02,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:11:02,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:11:02,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:11:02,681 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 06:11:02,682 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 06:11:02,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:11:02,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:11:02,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 06:11:02,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:11:02,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-18 06:11:02,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:11:02,974 INFO L353 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-01-18 06:11:02,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 36 [2022-01-18 06:11:02,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:11:02,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 06:11:03,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:11:03,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 38 [2022-01-18 06:11:03,268 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:11:03,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:11:03,759 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:11:03,759 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 2504 treesize of output 2417 [2022-01-18 06:11:03,767 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2022-01-18 06:11:03,787 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 06:11:03,971 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,SelfDestructingSolverStorable28 [2022-01-18 06:11:03,972 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArithmeticException: BigInteger out of long range at java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.computeDerApplicabilityScore(QuantifierPusher.java:685) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.selectBestEliminatee(QuantifierPusher.java:668) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:604) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:446) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-01-18 06:11:03,975 INFO L158 Benchmark]: Toolchain (without parser) took 79784.23ms. Allocated memory was 371.2MB in the beginning and 1.5GB in the end (delta: 1.2GB). Free memory was 331.4MB in the beginning and 1.5GB in the end (delta: -1.1GB). Peak memory consumption was 919.9MB. Max. memory is 16.0GB. [2022-01-18 06:11:03,975 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 371.2MB. Free memory is still 332.6MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 06:11:03,975 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.08ms. Allocated memory is still 371.2MB. Free memory was 331.4MB in the beginning and 329.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 06:11:03,976 INFO L158 Benchmark]: Boogie Preprocessor took 17.69ms. Allocated memory is still 371.2MB. Free memory was 329.8MB in the beginning and 328.9MB in the end (delta: 912.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 06:11:03,976 INFO L158 Benchmark]: RCFGBuilder took 237.13ms. Allocated memory is still 371.2MB. Free memory was 328.8MB in the beginning and 319.5MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 06:11:03,976 INFO L158 Benchmark]: TraceAbstraction took 79505.80ms. Allocated memory was 371.2MB in the beginning and 1.5GB in the end (delta: 1.2GB). Free memory was 319.0MB in the beginning and 1.5GB in the end (delta: -1.1GB). Peak memory consumption was 907.3MB. Max. memory is 16.0GB. [2022-01-18 06:11:03,976 INFO L339 ainManager$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 371.2MB. Free memory is still 332.6MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 18.08ms. Allocated memory is still 371.2MB. Free memory was 331.4MB in the beginning and 329.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 17.69ms. Allocated memory is still 371.2MB. Free memory was 329.8MB in the beginning and 328.9MB in the end (delta: 912.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 237.13ms. Allocated memory is still 371.2MB. Free memory was 328.8MB in the beginning and 319.5MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 79505.80ms. Allocated memory was 371.2MB in the beginning and 1.5GB in the end (delta: 1.2GB). Free memory was 319.0MB in the beginning and 1.5GB in the end (delta: -1.1GB). Peak memory consumption was 907.3MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: ArithmeticException: BigInteger out of long range de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArithmeticException: BigInteger out of long range: java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-01-18 06:11:04,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...